Date & Time Calculators
Count days, business days, hours and exact ages without errors from leap years, month lengths or overnight shifts.
- 6 tested calculators
- Formulas explained
- Private and free
Age Calculator
Exact age and days to next birthday.
Days Between Dates Calculator
Days, weeks and months between two dates.
Date Calculator
Add or subtract time from a date.
Time Duration Calculator
Hours and minutes between two times.
Hours Worked Calculator
Weekly timesheet with breaks and pay.
Business Days Calculator
Working days between dates, excluding holidays.
Count time without mistakes
Leap years, months of different lengths, overnight shifts and public holidays make date math surprisingly error-prone. These calculators handle every edge case — including February 29 birthdays and holidays that fall on weekends — and explain the rules they follow.