Date & Time Calculators
Find an exact age, add or subtract days from a date, count days between two dates and add up hours and minutes.
Date & Time Calculators list
Working with dates and durations
The Age Calculator counts complete years, months and days the way people celebrate birthdays, including leap-day birthdays. The Days Between Dates Calculator counts calendar days or weekdays between two dates, and the Date Calculator moves forward or backward from a date by years, months, weeks or days.
The Time Calculator adds or subtracts durations in hours, minutes and seconds — handy for timesheets, workouts and travel planning.
How calendar math is handled
Dates are processed as calendar days, independent of your time zone and daylight saving changes. When adding months lands on a day that doesn’t exist, such as February 30, the result moves to the last day of that month.