Age Calculator
Find your exact age from your birth date
Free Online Age Calculator
Calculate your exact age in years, months and days
"How old am I?" has a subtler answer than you'd think: your age is one year lower until your birthday passes, months have different lengths, and leap years complicate the math. This tool calculates your exact age in years, months and days with calendar precision — and with the "as of" date field, you can check your age on any past or future date. Alongside the result you'll see the days left until your next birthday, the weekday you were born on, and your age expressed in total months, weeks, days and even hours — perfect for catching fun milestones like your 10,000th day. The same calendar rules apply when you need a precise age for official paperwork such as visa applications, school enrollment or sports licenses.
Features
Exact Age
Get your precise age in years, months and days, not just a rounded number.
Any Reference Date
Calculate your age as of today or any past or future date you choose.
Total Time Lived
See your life in total months, weeks, days and hours at a glance.
100% Private
All calculations happen locally in your browser. Nothing is uploaded.
Age Calculation Guide
How it's calculated
- Age is computed as calendar years-months-days
- The year doesn't count until your birthday has passed
- Leap years (Feb 29) are included automatically
- The day component varies because months differ in length
Fun age milestones
- 10,000 days ≈ 27.4 years
- 1 billion seconds ≈ 31.7 years
- 500 months ≈ 41.7 years
- 25,000 days ≈ 68.4 years
Frequently Asked Questions
How exactly is age calculated?
By counting along the calendar from your birth date: full years first, then full months, then remaining days. If your birthday hasn't occurred yet this year, your age shows one lower — which is correct.
How do people born on February 29 count their age?
In non-leap years, leap-day birthdays are treated as February 28 or March 1 depending on the country. This tool computes calendar differences from real dates, so the result is always consistent.
Why can the months/days part differ between calculators?
Because months range from 28 to 31 days, the definition of a 'month' can create small differences between tools. The standard calendar-based method (used here) anchors to the same day of the following month.
Can I see my age on a specific date?
Yes — enter any date in the "as of" field. It's handy for checking your age on a past exam date or a future visa application day.
How are the total days and hours computed?
Real calendar days since your birth are counted and multiplied by 24 for hours. Leap years are included, which is why the result can differ by a few days from a rough '365 × age' estimate.
Which age counts for official purposes?
In most countries your legal age increases the moment your birthday is completed — the same rule this tool applies. Some contexts (e.g. sports federations) only look at the birth year, so check the rules of the institution involved.