Time and date math
This tool does three kinds of calculation: adding or subtracting days/hours/minutes from a date, finding the exact difference between two dates, and calculating age from a date of birth. Everything is computed instantly on your device.
Frequently Asked Questions
How is age calculated?
The full years, months and days from the date of birth to today are computed, plus the total number of days.
Does the time zone matter?
The date/time values you enter are interpreted in your device's local time.