Age Calculator
Type your date of birth to see your exact age in years, months and days, your age in weeks and days, and how long until your next birthday.
Free, no sign-up. Everything runs in your browser.
Enter your date of birth.
Step by step
How to use Age Calculator
- 1
Enter your date of birth
Pick the date in the calendar, or type it if your browser shows a text box.
- 2
Keep today or pick a date
The age is counted on today. Change the second date to find your age on any other day.
- 3
Read your age
See years, months and days, the totals in months, weeks and days, and your next birthday.
Overview
About Age Calculator
Your age is counted in completed years, then completed months, then the days left over. If you were born on 15 March 2000, on 2 November 2026 you are 26 years, 7 months and 18 days old: 26 birthdays have passed, 7 more months since the last one, and 18 days since the 15th.
Months have different lengths, so the leftover days are counted back from the month just before the age date, the way people and offices count age by hand. Total days are counted exactly, with every leap year included.
Set the second date to any day to see how old someone was or will be then, for example on the last date of a form. For age limits in government job notices, with category relaxation, use the Government Exam Age Calculator.
Everything runs in your browser. Your date of birth is not stored or sent anywhere.
When it helps
- Checking your exact age for a form that asks for years, months and days
- Finding a child's age in months for school admission or vaccination
- Counting the days to a birthday
- Finding the day of the week you were born on
Specs
Supported files and limits
- Shows
- Years, months and days; total months, weeks and days; day of birth; next birthday
- Dates
- Any date from the year 1900; the age date can be in the past or future
- Leap years
- Counted exactly. Born on 29 February, the birthday is 1 March in other years
- Where it runs
- In your browser. Nothing is uploaded.
Good to know
- It uses your device's date for today. If your phone's date is wrong, change the second date by hand.
- Some offices count a 29 February birthday on 28 February in non-leap years; this tool uses 1 March.
- It does not check age limits for jobs or exams. Use the Government Exam Age Calculator for that.
Fix a problem
Troubleshooting
It says the date of birth is after the age date
Check the year. Date boxes sometimes keep the current year when you pick only the day and month.
My age is one day different from another site
Sites count leftover days differently around month ends. This tool counts back from the month before the age date, as offices usually do.
The date box is hard to use on my phone
Tap the year at the top of the date picker to jump straight to your birth year.
FAQ
Frequently asked questions
How do I calculate my age from my date of birth?
Count your completed years, then the months since your last birthday, then the days since that date in the month. The calculator does this for you.
How old am I if I was born on 15 March 2000?
On 2 November 2026 you are 26 years, 7 months and 18 days old. That is 319 months, 1,389 weeks and 5 days, or 9,728 days.
Which day of the week was I born?
The calculator shows it under your age. For example, 15 March 2000 was a Wednesday.
How many days until my birthday?
It is shown with your next birthday. Born on 15 March, on 2 November 2026 your next birthday is in 133 days, on Monday 15 March 2027.
What if I was born on 29 February?
In years without 29 February the calculator counts your birthday on 1 March. Your total age in days is always exact.
Can I find my age on a past or future date?
Yes. Change the Age on date to any day, such as a form's last date.
Is my date of birth saved?
No. The calculation happens in your browser and nothing is stored or sent.