Age and Date Difference Calculator
Find an exact age, or count the days, weeks and working days between two dates.
Age
31 years, 3 months, 3 days
Total months
375
Total weeks
1,631
Total days
11,418
Next birthday in
270 days
How to use Age & Date Difference Calculator
- 01Enter a birth date to get an exact age, or two dates to measure the gap.
- 02Read the result in years, months and days, plus a total in days and weeks.
- 03Switch on working days to exclude weekends.
About Age & Date Difference Calculator
Age is counted in calendar terms rather than fixed-length units, so the calculator walks forward whole years and months before counting the remaining days. That is why an age can be five years and zero months on a birthday.
Leap years are handled properly: a year is a leap year if it divides by four, except centuries, unless they divide by 400 — which is why 2000 was a leap year and 1900 was not.
Frequently asked questions
- Does it handle leap years?
- Yes, including the century rule.
- Can it count working days?
- Yes, weekends can be excluded from the total. Public holidays are not included.
- How is age worked out?
- In whole years and months first, then the leftover days, exactly as people say their age.
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