Dates & Time
How much time is between these?
Dates and time are deceptively hard by hand: months vary in length, leap years add a day, and the clock counts in base 60. These tools handle all of it, so the answer is always exact and never off by one.
- Age Calculator Exact age in years, months and days from a birth date. Open calculator
- Date Calculator Days between two dates, or add/subtract days from a date. Open calculator
- Time Calculator Add or subtract durations in days, hours, minutes, seconds. Open calculator
- Hours Calculator Hours worked between two clock times, minus breaks. Open calculator
Guides on this topic
- Calculating Days Between Dates How to count the days between two dates and add or subtract days for deadlines and due dates — with the leap-year and month-length details handled for you.
- How to Calculate Your Exact Age Working out an exact age in years, months and days is trickier than it looks — here's why leap years and month lengths matter, and how to get it right every time.
- How to Calculate Hours Worked Turn clock-in and clock-out times into hours and decimal hours for payroll — including breaks and overnight shifts — without the arithmetic headaches.