Age Calculator
Age in years, months, and days. Age on a date, find a birth date, or compare two dates.
Age today
Years
26
Months
7
Days
20
Born on Saturday, 1 January 2000
9729 days · 1389 weeks
Next birthday Friday, 1 January 2027 · 133 days
How it works
Pick a mode
Age today from a birth date. Age on another date. Find a birth date from an age. Or the gap between two dates.
Enter dates
Results update as you change the fields. Years and months in Find birth date accept digits only.
Copy the result
Copy sits on the result. Age today also shows weekday of birth, days lived, and the next birthday.
What is an age calculator?
An age calculator counts completed years, months, and days between a birth date and another date. That is calendar age, the figure on forms and ID, not an average year of 365.25 days. This page also answers how old someone was or will be on a chosen date, what birth date matches a given age, and how far apart two dates are.
Why use this tool
- Years, months, and days, not a 365.25-day average
- Age on a past or future date
- Find a birth date from years and months
- Gap between two dates, with days and weeks
- Copy on the result. No account. Unlimited on the free plan
Questions
What does Age Calculator do?
It turns dates into calendar age: years, months, and days. You can also ask age on a chosen date, reverse an age into a birth date, or compare two dates.
How do I use Age Calculator?
Pick a mode and enter dates. The result updates as you type. Copy sits on the result.
How is age counted?
Calendar age, not total days divided by 365.25. Months have 28–31 days, so the day count follows the previous month when the birthday day has not arrived yet.
What about 29 February?
In a non-leap year the next birthday uses 28 February. Age still steps up on that day.
Can I see age on a future date?
Yes. Open On a date and pick a date after the birth date. That is how old someone will be then.
How does Find birth date work?
Enter how old someone is (years and months) as of a date. The tool subtracts that span and shows the birth date.
What is Age difference?
It is the calendar gap between two dates, in years, months, and days, plus total days and weeks. Order does not matter.
Is there a daily limit?
No. There is no daily cap on this tool.
Do I need an account?
No. Open the page and use it.
Does it work on a phone?
Yes. It runs in the mobile browser.
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