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Calculators

Professional calculators for finance, mathematics, geometry, and everyday calculations.

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Financial Calculators

Comprehensive financial tools for loans, investments, taxes, and retirement planning.

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VAT Calculator

Advanced VAT/GST calculator with rates for 170+ countries, custom rates, reverse calculation, multiple items support, and comprehensive tax breakdown. Perfect for businesses and international commerce.

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US Sales Tax Calculator

Advanced US sales tax calculator with rates for all 50 states, local taxes, special districts, nexus rules, and exemptions. Calculate taxes for multiple items, e-commerce, and interstate sales.

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Mortgage Calculator

Advanced mortgage calculator with detailed amortization schedules, extra payment analysis, PMI calculations, tax benefits, and comprehensive loan analysis. Perfect for home buyers and refinancing decisions.

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Loan Calculator

Advanced loan calculator for personal, auto, business, and student loans with amortization schedules, extra payments, and comprehensive analysis. Compare loan types and optimize payment strategies.

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Student Loan Calculator

Specialized education loan calculator with federal/private loan analysis, income-driven repayment plans, loan forgiveness scenarios, and student debt optimization strategies.

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Personal Loan Calculator

Unsecured loan calculator with debt consolidation analysis, credit score impact modeling, rate comparisons, and personal financing optimization tools.

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Auto Loan Calculator

Vehicle financing calculator with new/used car analysis, trade-in value modeling, dealer vs bank financing comparisons, and auto loan optimization.

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Business Loan Calculator

Commercial financing calculator with SBA loan modeling, equipment financing analysis, working capital planning, and business debt strategies.

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Interest Calculator

Advanced interest calculator for simple and compound interest with inflation adjustments, tax calculations, periodic contributions, and comprehensive investment analysis. Calculate savings growth, investment returns, and compare different compounding frequencies.

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Debt Ratio Calculator

Calculate your debt-to-income ratio with detailed breakdown by debt categories. Features front-end/back-end ratios, visual indicators, recommendations, and export functionality.

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Salary Calculator

Professional salary calculator with tax calculations, benefits analysis, overtime pay, bonuses, deductions, and comprehensive compensation breakdown. Calculate take-home pay, hourly rates, and annual salary conversions with detailed payroll analysis.

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Inflation Calculator

Professional inflation calculator with historical inflation rates, purchasing power analysis, cost of living adjustments, and comprehensive economic impact assessment. Calculate real value, inflation-adjusted returns, and future cost projections with detailed analysis.

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Currency Calculator

Professional currency converter with real-time exchange rates, historical data, currency trends, and comprehensive foreign exchange analysis. Convert between 170+ world currencies with live rates, cross-rate calculations, and detailed market insights.

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Amortization Calculator

Professional amortization calculator with detailed payment schedules, extra payment analysis, refinancing scenarios, and comprehensive loan amortization tables. Calculate monthly payments, total interest, and optimize loan payoff strategies with advanced features.

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Rent vs Buy Calculator

Professional rent vs buy calculator with comprehensive analysis, total cost of ownership, opportunity cost analysis, and detailed financial projections. Compare renting vs buying with tax benefits, appreciation, maintenance costs, and investment alternatives.

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Lease Calculator

Professional vehicle lease calculator with comprehensive cost analysis, lease vs buy comparison, residual value calculations, and detailed payment breakdowns. Calculate monthly payments, total lease costs, and analyze lease deals with money factor, capitalized cost, and trade-in analysis.

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APR Calculator

Calculate the true Annual Percentage Rate (APR) including all fees and costs. Features multiple calculation methods, fee analysis, payment schedules with charts, and comparison tools.

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GPA Calculator

Advanced GPA calculator with cumulative GPA tracking, semester management, grade planning, and comprehensive academic performance analysis for students. Calculate GPA with multiple grading scales, prior GPA integration, and target GPA planning.

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401k Calculator

Professional 401k retirement calculator with comprehensive analysis, employer matching, contribution limits, tax benefits, and detailed retirement projections. Calculate retirement savings, optimize contributions, and plan for financial independence with advanced 401k planning tools.

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Marriage Tax Calculator

Professional marriage tax calculator analyzing tax implications, cost savings, living expenses, and financial benefits of marriage vs staying single. Compare married vs single filing status, shared expenses, healthcare costs, and comprehensive financial planning for couples.

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Credit Card Calculator

Professional credit card payoff calculator with multiple card management, debt avalanche vs snowball strategies, balance transfer analysis, and comprehensive payment planning. Calculate payoff times, interest savings, and optimize your credit card debt elimination strategy.

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Retirement Calculator

Professional retirement planning calculator with comprehensive analysis including 401k, IRA, Social Security optimization, withdrawal strategies, and inflation-adjusted projections. Plan your retirement savings, calculate required monthly contributions, and analyze multiple retirement scenarios.

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Social Security Calculator

Professional Social Security benefits calculator with comprehensive analysis including optimal claiming strategies, spousal benefits, survivor benefits, and lifetime value optimization. Calculate your estimated benefits, compare claiming ages, and maximize your Social Security income.

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IRA Calculator

Professional IRA calculator with Traditional vs Roth IRA comparison, contribution limits analysis, tax benefits optimization, and required minimum distribution planning. Calculate IRA growth, compare tax strategies, and maximize your retirement savings with detailed projections.

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Estate Tax Calculator

Professional estate tax calculator with federal and state tax analysis, 2025 exemptions, gift tax integration, and wealth transfer optimization. Calculate estate taxes, explore tax-saving strategies, and plan efficient inheritance with advanced estate planning tools.

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RMD Calculator

Professional Required Minimum Distribution calculator with comprehensive analysis including IRS life expectancy tables, multiple account management, tax planning strategies, and penalty avoidance. Calculate RMDs for Traditional IRAs, 401(k)s, and inherited accounts with detailed projections and optimization strategies.

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Tax Return Calculator

Advanced federal and state tax return calculator with 2024 tax brackets, deductions, credits, filing status optimization, and comprehensive tax planning analysis. Calculate tax liability, refunds, effective tax rates, and optimize your tax strategy with professional-grade tools.

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Business Calculators

Essential business financial calculators for entrepreneurs, small businesses, and corporate finance.

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ROAS Calculator

Professional Return on Ad Spend calculator with advanced metrics analysis, industry benchmarks, campaign comparison, and profit optimization. Calculate ROAS for Google Ads, Facebook Ads, and all digital marketing channels with comprehensive performance insights.

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YouTube Revenue Calculator

Professional YouTube revenue calculator with advanced CPM/RPM analysis, niche-specific calculations, geographic targeting, and comprehensive earning projections. Calculate potential YouTube earnings with industry-leading accuracy.

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Website Valuation Tool

Professional website valuation calculator using proven marketplace methodologies. Calculate your website's worth with multiple factors including business model, revenue, growth, and risk assessment. Get accurate estimates based on Empire Flippers and Flippa data.

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Employee Turnover Calculator

Professional employee turnover rate calculator with industry benchmarks, cost analysis, and comprehensive HR metrics. Calculate voluntary, involuntary, and overall turnover rates with detailed insights and performance comparisons.

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Website Ad Revenue Calculator

Professional website ad revenue calculator with advanced CPM/CPC analysis, ad network comparison, geographic targeting, and comprehensive earning projections. Calculate potential website ad earnings with industry-leading accuracy.

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Tenure Calculator

Professional tenure calculator for employees, real estate, academic positions, and business relationships. Calculate work tenure, employment duration, property ownership periods, and academic career progression with comprehensive analysis.

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Time Value of Money Calculator

Advanced time value of money calculator with present value, future value, annuities, inflation analysis, and investment scenario modeling. Professional TVM calculator with comprehensive financial analysis and interactive visualizations.

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Year-over-Year Growth Calculator

Advanced year-over-year growth calculator with multi-metric analysis, trend visualization, industry benchmarking, and comprehensive growth rate calculations. Professional YoY growth analysis with forecasting and comparative insights.

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Sales Commission Calculator

Professional sales commission calculator with tiered structures, team splits, bonus programs, and draw management. Calculate simple commissions, progressive rates, team performance, and multi-period analysis with comprehensive compensation planning tools.

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SaaS Metrics Calculator

Comprehensive SaaS KPI dashboard with health scoring, unit economics analysis, churn metrics, and growth tracking. Calculate MRR, ARR, LTV/CAC, retention rates, and 20+ key performance indicators with industry benchmarks for data-driven decisions.

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Price Quantity Calculator

Advanced price-quantity calculator with demand analysis, price elasticity modeling, revenue optimization, and competitive positioning. Professional pricing strategy tool with break-even analysis, scenario planning, and market analysis.

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PVGO Calculator

Professional Present Value of Growth Opportunities calculator with advanced valuation models, growth analysis, and investment evaluation. Features Gordon Growth Model, Two-Stage Model, CAPM integration, and comprehensive risk assessment.

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Pre/Post Money Valuation Calculator

Advanced pre and post-money valuation calculator with equity dilution analysis, liquidation waterfall modeling, cap table calculations, and comprehensive investment terms analysis for startup funding and equity evaluation.

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Payback Period Calculator

Professional payback period calculator with NPV analysis, IRR calculations, discounted payback, risk assessment, and comprehensive investment evaluation. Advanced capital budgeting tool with scenario analysis and decision framework.

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Investment Return Calculator

Advanced investment return calculator with performance analysis, risk-adjusted metrics, benchmark comparison, Sharpe ratio calculation, Alpha/Beta analysis, and comprehensive portfolio evaluation with professional grading system.

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3D Printer Buy vs Outsource Calculator

Advanced manufacturing decision calculator with total cost of ownership analysis, ROI calculations, strategic factor assessment, printer type database, and comprehensive investment evaluation. Calculate break-even points, operational costs, and make informed manufacturing decisions.

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Absence Percentage Calculator

Comprehensive workforce analytics calculator with absence rate analysis, cost impact assessment, department comparison, intervention ROI, and benchmarking tools. Professional HR dashboard with risk levels and strategic recommendations for workforce management.

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Accumulated Depreciation Calculator

Professional asset depreciation calculator with multiple methods including straight-line, declining balance, MACRS, sum-of-years, and units of production. Features tax optimization with Section 179 and bonus depreciation for comprehensive asset management.

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AFN Calculator (Additional Funds Needed)

Advanced financial forecasting calculator with comprehensive growth analysis, funding optimization, scenario planning, and strategic financial management. Calculate external financing requirements with multiple methods and detailed projections.

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Average Collection Period Calculator

Professional receivables management calculator with cash flow analysis, aging schedule optimization, credit policy evaluation, and comprehensive collection strategies. Advanced tool for credit managers and financial analysts.

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Bounce Rate Calculator

Calculate website bounce rate and analyze visitor engagement metrics. Measure single-page sessions vs total sessions with industry benchmarks, performance analysis, and actionable recommendations for website optimization.

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Online Marketing ROI Calculator

Calculate return on investment for digital marketing campaigns. Analyze campaign profitability, optimize advertising spend, and measure marketing efficiency with comprehensive ROI analysis and performance insights.

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Business Budget Calculator

Plan and manage business budgets with detailed income and expense tracking. Create comprehensive financial plans, analyze profitability, and project cash flow with dynamic budget management and export capabilities.

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Build or Buy Calculator

Compare costs and benefits of building in-house versus buying solutions. Make informed business decisions with NPV analysis, time-to-value assessment, and comprehensive make-or-buy analysis.

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COGS Calculator

Calculate Cost of Goods Sold and analyze gross profit margins. Use inventory formula or detailed breakdown methods to assess business profitability, optimize pricing, and manage inventory costs.

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CPA Calculator

Calculate Cost Per Acquisition with advanced channel comparison, LTV analysis, and customer acquisition optimization strategies. Professional marketing analytics with performance insights and ROI calculations.

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CPC & CPM Calculator

Calculate Cost Per Click and Cost Per Mille with advanced bidding strategies, cross-platform comparison, and performance optimization insights for maximum advertising efficiency.

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CTR Calculator

Calculate Click-Through Rate with advanced analytics, A/B testing insights, and conversion optimization strategies for maximum engagement and campaign performance.

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CAC Calculator

Calculate Customer Acquisition Cost with comprehensive LTV analysis, payback period calculations, and marketing channel optimization strategies for sustainable business growth.

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Customer Retention Rate Calculator

Calculate customer retention rates with comprehensive cohort analysis, churn predictions, lifetime value impact, and retention optimization strategies for sustainable business growth.

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Direct Material Price Variance Calculator

Calculate direct material price variance with comprehensive cost analysis, supplier performance metrics, procurement optimization strategies, and advanced variance reporting for manufacturing cost control.

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Earned Value Management Calculator

Calculate EVM metrics with comprehensive project analytics, performance forecasting, schedule variance analysis, and advanced project management insights for optimal project control and delivery.

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Effective Corporate Tax Rate Calculator

Calculate effective corporate tax rate with comprehensive tax optimization, multi-jurisdiction analysis, deduction planning strategies, and advanced tax efficiency metrics for optimal tax management.

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EMV (Expected Monetary Value) Calculator

Calculate Expected Monetary Value with comprehensive risk analysis, decision tree modeling, portfolio optimization, and advanced probability assessment for strategic decision-making and risk management.

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Exit Rate Calculator

Calculate website exit rates with comprehensive user behavior analysis, conversion optimization insights, funnel analytics, and advanced web performance metrics for data-driven digital marketing decisions.

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Biology & Science Calculators

Professional biological and scientific calculators for research, education, and laboratory applications.

Bio Laboratory Calculators

Specialized calculators for laboratory applications, cell culture, and analytical procedures.

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Annealing Temperature Calculator

Calculate optimal annealing temperature for PCR primers with melting temperature analysis and primer optimization. Essential tool for PCR optimization and molecular biology applications.

Bio Laboratory Calculators
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Generation Time Calculator

Calculate bacterial and cell generation time with doubling time analysis for microbiology and cell culture. Essential for fermentation, cell biology, and growth kinetics research.

Bio Laboratory Calculators
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Cell Dilution Calculator

Calculate cell dilutions for cell culture, microscopy, and laboratory applications with concentration analysis. Essential tool for cell biology and laboratory research.

Bio Laboratory Calculators
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Cell Doubling Time Calculator

Calculate cell doubling time and growth rate for cell culture and proliferation studies. Essential for cell biology, cancer research, and drug testing applications.

Bio Laboratory Calculators
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DNA Concentration Calculator

Calculate DNA concentration using absorbance measurements and spectrophotometry analysis. Essential tool for molecular biology, PCR preparation, and laboratory quantification.

Bio Laboratory Calculators
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DNA Ligation Calculator

Calculate DNA ligation ratios and concentrations for molecular cloning and vector construction. Essential tool for genetic engineering and plasmid preparation.

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Log Reduction Calculator

Calculate log reduction values for antimicrobial efficacy and sterilization validation. Essential for microbiology, quality control, and disinfection studies.

Bio Laboratory Calculators
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Laboratory Dilution Calculator

Calculate solution dilutions for laboratory preparations with molarity and concentration conversions. Essential tool for analytical chemistry and biochemical assays.

Bio Laboratory Calculators
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Protein Concentration Calculator

Calculate protein concentration using Bradford, BCA, and spectrophotometry methods. Essential for protein analysis, biochemistry research, and protein purification.

Bio Laboratory Calculators
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Animal Pregnancy Calculators

Calculate gestation periods and breeding schedules for various animals and livestock.

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Cat Pregnancy Calculator

Calculate cat gestation period and pregnancy timeline. Track important milestones and prepare for kitten birth with accurate feline pregnancy calculations.

Animal Pregnancy Calculators
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Cow Gestation Calculator

Calculate cattle gestation period and breeding schedules. Essential tool for dairy and beef farmers to track bovine pregnancy and plan for calving.

Animal Pregnancy Calculators
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Dog Pregnancy Calculator

Calculate dog gestation period and pregnancy stages. Track canine pregnancy milestones and prepare for puppy birth with accurate timing.

Animal Pregnancy Calculators
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Goat Gestation Calculator

Calculate goat pregnancy timeline and kidding schedule. Essential tool for goat breeders to track caprine gestation and plan for birth.

Animal Pregnancy Calculators
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Guinea Pig Pregnancy Calculator

Calculate guinea pig gestation period and pregnancy stages. Track cavy pregnancy timeline and prepare for pup birth with accurate calculations.

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Mare Gestation Calculator - Horse Gestation

Calculate horse and mare gestation period for equine breeding. Track pregnancy timeline and foaling schedule with professional accuracy.

Animal Pregnancy Calculators
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Llama Gestation Calculator

Calculate llama pregnancy timeline and birth schedule. Essential tool for camelid breeders to track gestation and plan for cria birth.

Animal Pregnancy Calculators
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Rabbit Gestation Calculator

Calculate rabbit pregnancy period and kindling schedule. Track lagomorph gestation timeline and prepare for kit birth with accurate timing.

Animal Pregnancy Calculators
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Sheep Gestation Calculator

Calculate sheep pregnancy timeline and lambing schedule. Essential tool for shepherds and sheep farmers to track ovine gestation periods.

Animal Pregnancy Calculators
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Swine Gestation Calculator

Calculate pig pregnancy timeline and farrowing schedule. Essential tool for pig farmers to track swine gestation and plan for piglet birth.

Animal Pregnancy Calculators
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Dog Calculators

Comprehensive dog health, care, and dosage calculators for veterinarians and pet owners.

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Benadryl Dosage Calculator for Dogs

Calculate safe Benadryl dosage for dogs based on weight and condition. Veterinary-approved antihistamine dosing for canine allergies and reactions.

Dog Calculators
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Cephalexin For Dogs Dosage Calculator

Calculate proper Cephalexin antibiotic dosage for dogs. Veterinary dosing calculator for bacterial infections in canines.

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Cost of Owning a Dog Calculator

Calculate the total lifetime cost of dog ownership including food, veterinary care, grooming, and supplies. Budget planning for pet expenses.

Dog Calculators
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Dog Age Calculator

Convert dog age to human years using modern veterinary calculations. Accurate age conversion based on breed size and life stage.

Dog Calculators
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Dog BMI Calculator

Calculate your dog's Body Mass Index and assess body condition score. Canine weight management and obesity prevention tool.

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Dog Nutrition Calculator

Calculate daily nutritional requirements for dogs including calories, protein, and nutrients. Customized feeding recommendations by age and activity.

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Dog Chocolate Toxicity Calculator

Calculate chocolate toxicity risk for dogs based on type and amount consumed. Emergency assessment tool for theobromine poisoning.

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Dog Crate Size Calculator

Calculate the ideal crate size for your dog based on measurements and growth predictions. Proper crate sizing for training and comfort.

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Dog Food Calculator

Calculate daily dog food portions and feeding amounts. Customized feeding recommendations based on weight, age, and activity level.

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Dog Harness Size Calculator

Calculate the correct harness size for your dog using chest and neck measurements. Proper fitting guide for comfortable and secure harnesses.

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Dog Heat Cycle Calculator

Track and predict dog heat cycles and estrus timing. Essential tool for breeding planning and reproductive health monitoring.

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Dog Life Expectancy Calculator

Calculate dog life expectancy based on breed, size, and health factors. Longevity predictions and senior care planning.

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Metacam Dosage Calculator for Dogs

Calculate safe Metacam (meloxicam) dosage for dogs. Veterinary NSAID dosing for canine pain and inflammation management.

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Dog Onion Toxicity Calculator

Calculate onion toxicity risk for dogs based on amount consumed. Emergency assessment tool for allium poisoning in canines.

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Dog Quality of Life Calculator

Assess dog quality of life using veterinary scales. Objective evaluation tool for senior dogs and end-of-life decision making.

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Dog Raisin Toxicity Calculator

Calculate raisin and grape toxicity risk for dogs. Emergency assessment tool for potentially fatal grape poisoning in canines.

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Dog Size Calculator

Predict adult dog size based on puppy measurements and breed. Growth calculator for estimating final weight and dimensions.

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Dog Water Intake Calculator

Calculate daily water requirements for dogs based on weight, activity, and environment. Hydration needs for optimal canine health.

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Omega-3 For Dogs Calculator

Calculate optimal Omega-3 dosage for dogs. Fish oil and fatty acid supplementation for canine joint health and coat condition.

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Raw Dog Food Calculator

Calculate raw food portions and nutritional balance for dogs. BARF diet calculator with meat, organ, and bone ratios.

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Tramadol For Dogs Calculator

Calculate safe Tramadol dosage for dogs based on weight and condition. Veterinary pain medication dosing for canine pain management.

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Construction Calculators

Professional construction calculators for material estimation, structural analysis, and project planning.

Math & Geometry Calculators

Advanced mathematical and geometric calculators for education, engineering, and construction.

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Concrete Calculator

Professional concrete calculator for volume estimation, material calculations, and cost analysis. Calculate concrete needed for slabs, footings, driveways, and foundations with mixing ratios, cost estimates, and comprehensive construction planning tools.

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Area Calculator

Calculate areas of geometric shapes including rectangles, circles, triangles, parallelograms, trapezoids, ellipses, and sectors. Professional calculator with unit conversion, visual diagrams, and detailed formulas.

Math & Geometry Calculators
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Pythagorean Theorem Calculator

Calculate missing sides of right triangles using the Pythagorean theorem (a² + b² = c²). Find hypotenuse, missing sides, or verify right triangles with step-by-step solutions, visual diagrams, and construction applications.

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Volume Calculator

Calculate volumes of 3D shapes including cubes, spheres, cylinders, cones, pyramids, and prisms. Professional calculator with unit conversion, visual diagrams, and batch processing for construction, shipping, and engineering.

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Perimeter Calculator

Calculate perimeters of 2D shapes including rectangles, circles, triangles, polygons, and irregular shapes. Professional calculator with unit conversion, visual diagrams, and batch processing for construction, fencing, and landscaping.

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Triangle Calculator

Comprehensive triangle calculator for area, perimeter, angles, and sides. Calculate all triangle types including equilateral, isosceles, scalene, and right triangles with Law of Cosines, Law of Sines, visual diagrams, and professional construction applications.

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Circle Calculator

Professional circle calculator for circumference, area, diameter, radius, arc length, and sector calculations. Calculate all circle properties with visual diagrams, unit conversion, and advanced geometric features for construction, engineering, and design applications.

Math & Geometry Calculators
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Rectangle Calculator

Professional rectangle calculator for area, perimeter, diagonal, and dimension calculations. Calculate all rectangle properties with visual diagrams, unit conversion, and advanced features for construction, design, and engineering applications.

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Cubic Equation Calculator

Advanced cubic equation solver with real-time visualization, step-by-step solutions, and interactive graphing. Solve ax³ + bx² + cx + d = 0 with multiple solution methods, smooth animations, and comprehensive mathematical analysis.

Math & Geometry Calculators
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Scientific Calculator

Advanced scientific calculator with graphing capabilities, function plotting, step-by-step solutions, and comprehensive mathematical operations. Features trigonometry, logarithms, statistics, and real-time function visualization.

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Why Choose Our Calculators?

🚀 Fast & Efficient

All calculators are optimized for speed and performance, helping you get things done quickly without compromising accuracy.

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📱 Works Everywhere

Access our calculators from any device - desktop, tablet, or mobile. No installation required.

🆓 Always Free

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