Age / Date Calculator
Calculate your exact age or the difference between two dates in years, months, and days, plus total days. Free, instant, and private.
Work out an exact age or the gap between any two dates, broken down into years, months, and days, plus the total number of days. It's ideal for birthdays, anniversaries, deadlines, and eligibility checks. The calculation happens instantly in your browser.
How to use Age / Date Calculator
- Pick a start date, such as a birthday.
- Leave the end date as today, or choose a different date.
- See the result in years, months, and days, along with the total days.
Frequently asked questions
How is the age calculated?
The tool counts complete years and months from the start date, then the remaining days — the same way you'd naturally say someone is "34 years, 2 months, and 5 days" old.
Does it handle leap years?
Yes. Month lengths and leap days are accounted for, so results stay correct across February and leap years.
Can I calculate a future date difference?
Yes. Set the end date later than the start date to count down to an event, or use any two dates to measure the span between them.
Is my date information private?
Yes. The dates you enter are processed locally in your browser and never sent anywhere.