Date & Time Calculator
Age Difference Calculator
Calculate the calendar age difference between two dates of birth.
Calculator
Results
Age difference
5 years, 3 months, 5 days
Total days1923
Earlier dateMay 20, 1990
Later dateAug 25, 1995
Results are calculated instantly in your browser using the inputs shown. Date and time calculations follow the stated assumptions below.
How it works
Calculate the calendar age difference between two dates of birth.
Age difference uses calendar years, months and days after ordering the two dates.
Example
| Example | Result |
|---|---|
| May 20, 1990 to Aug 25, 1995 | 5 years, 3 months, 5 days. |
Important notes
- Calendar calculations use Gregorian calendar rules.
- Business-day calculations exclude Saturday and Sunday unless stated otherwise.
- Time-zone calculations depend on the browser's IANA time-zone data.
- For planning purposes, verify dates and times when a contractual or legal deadline is involved.
Frequently Asked Questions
Does order matter?
No. The calculator reports the absolute difference.
How to use this calculator
What to enter
Enter or select the following as requested: First date of birth; Second date of birth. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The date or duration result is calculated from the entered dates, times, calendar rules, and exclusions. Check inclusive versus exclusive counting, time zone, daylight-saving changes, and whether weekends or holidays are excluded.
When to use it
Use this to plan a date, measure elapsed time, or estimate a deadline. Verify the relevant calendar, location, and legal or workplace rules when they affect the answer.