Age and date calculator
Enter a date of birth for the exact age and the next birthday, count the days or weekdays between two dates, or find the date that is 90 days from now. Leap years and month-ends are handled correctly.
Runs in your browser — nothing is uploaded
Result
Enter a date of birth to see the age.
How to use it
- 1Choose Age, Days between dates, or Add or subtract.
- 2Pick the dates (for Age, just your date of birth — today is used unless you choose another day).
- 3Read the answer below: the age with the next birthday, the gap in days, weeks and months, or the new date and its weekday.
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Frequently asked questions
How do I calculate my exact age?
Choose Age and enter your date of birth. You get your age in years, months and days, your age in total months, weeks, days and hours, and the day of your next birthday.
How many days are there between two dates?
Choose Days between dates and pick both dates. Tick “Count the last day too” if both the first and the last day should be included, for example when counting a hotel stay's nights versus days.
Does it count weekdays, and what about public holidays?
It shows the number of weekdays (Monday to Friday) and weekend days between the dates. Public holidays differ by country and aren't taken off.
How does it handle 29 February and the ends of months?
Adding one month to 31 January gives 28 February (or 29 in a leap year) — the last day of the shorter month. A person born on 29 February has their birthday counted on 28 February in years without a 29th.
How do I find the date 90 days from today?
Choose Add or subtract, leave the start date empty to use today, type 90 in Days and press Add. The answer includes the weekday.
Is my date of birth stored or sent anywhere?
No. Everything is worked out in your browser and nothing is saved or uploaded.