Age Calculator

Written byOleh Soloninupdated 25 September 2026

Birth Date

Advanced options

On date

Leave empty to calculate for today.

Result

Years31
Months3
Days21
Days lived11,436
Next birthdayin 252 days, 15 June 2027: turning 32

Precise to the day, not rounded to the year

Work out an exact age from a date of birth, including leap years. Also shows total days lived and the next birthday.

Age in whole years is fine socially and useless on a form. Visa applications, insurance and school enrolment all want the exact figure.

The calculation has to respect calendar reality: months are different lengths and February has 29 days in years divisible by 4, except century years not divisible by 400. Approximating with 365 days drifts by a day per leap year.

How to use

Enter the date of birth.
If you need the age on a particular date — for a form, a school place or a contract — open the extra fields and set that date.
Read off the whole years, months and days, the total days lived and how long remains until the next birthday.

Age on 1 September 2026

Schools, forms and contracts ask for age on a fixed date. Each row is a separate run of this calculator for 1 September 2026.

Every row comes from the calculator on this page.
Date of birth	Age	Days lived	Next birthday
2019-09-02	6 years 11 months 30 days	2,556	in 1 day: turning 7
2008-09-01	18 years 0 months 0 days	6,574	today: turning 18
2000-02-29	26 years 6 months 3 days	9,681	in 180 days, 28 February 2027: turning 27
1990-05-15	36 years 3 months 17 days	13,258	in 256 days: turning 37
1961-04-12	65 years 4 months 20 days	23,883	in 223 days: turning 66

What this calculator shows

Age in years, months and days as of today
Total days lived
How long until the next birthday

What to keep in mind

Uses calendar arithmetic including leap years, not a fixed 365-day year.
Age increments on the birthday itself, following the convention used in most countries.

FAQs

How do you count age across a leap year?

By calendar date, not day count. Someone born on 10 May turns a year older each 10 May regardless of whether 366 or 365 days passed.

Why does my age in days seem higher than expected?

Leap days accumulate. Over 40 years you collect ten extra days that a 365-per-year estimate quietly loses.

What about people born on 29 February?

In common years the calculator uses 28 February as the birthday. Laws differ between countries on whether it is 28 February or 1 March; the count of days lived is unaffected either way.

Does it use my local timezone?

It works from calendar dates, so results do not shift with the clock. Right around midnight a different timezone could differ by a day.

How old will a child be on 1 September?

Set 1 September of that year as the date to calculate on. A child born on 2 September 2019 is 6 years, 11 months and 30 days old on 1 September 2026, and turns seven the next day.

On which day do you turn 18?

On the birthday itself. For someone born on 1 September 2008 the calculator shows exactly 18 years, 0 months and 0 days on 1 September 2026.

Worked example

Born on 29 February

Input: Born 29 February 2000, age on 1 September 2026

Output: 26 years, 6 months, 3 days; 9,681 days lived

Note: A true 29 February comes round once in four years. In common years the calculator treats 28 February as the birthday, so the next one is 28 February 2027, 180 days away.

Useful links

All tools in Date & Time World Clock Time Difference

Age Calculator

Result

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