Date & Time Calculators
Work out intervals between dates, working days, durations and times across zones, with correct handling of leap years and daylight saving.
Date Calculator
Find the exact interval between two dates in years, months and days, or add and subtract a duration from any date. Leap years and month lengths are handled properly.
Business Days Calculator
Count working days between two dates, choose which days count as your weekend, subtract public holidays and project a deadline a given number of working days ahead.
Time Duration Calculator
Work out how long is between two times, add or subtract hours and minutes, and convert the result into decimal hours for timesheets and invoices.
Time Card Calculator
Add up a week of clock in and clock out times with unpaid breaks, split regular from overtime hours and get the total pay at your hourly rate.
Countdown Timer
Count down to any date and time with a live display in days, hours, minutes and seconds, shown in the time zone you choose.
Time Zone Converter
Convert a date and time between any two time zones, with daylight saving applied automatically and the offset for each zone shown alongside the result.
Why Choose Our Date & Time Calculators?
🚀 Fast & Efficient
All date & time calculators are optimized for speed and performance, helping you get things done quickly without compromising accuracy.
🔒 Privacy First
Your data stays in your browser. We don't store, track, or share any information you input into our date & time calculators.
📱 Works Everywhere
Access our date & time calculators from any device - desktop, tablet, or mobile. No installation required.
🆓 Always Free
No subscriptions, no hidden fees. All our date & time calculators are completely free to use, forever.