Enter your date of birth and find your exact age in years, months and days — plus how many days you have lived and when your next birthday is.
1. Select your date of birth from the calendar. 2. Click Calculate Age. 3. Your exact age appears in years, months and days.
An age calculator tells you your exact age from your date of birth. Instead of guessing or counting on your fingers, you enter the day, month and year you were born, and this free age calculator works out your age in years, months and days in one second. It is useful for everyone: parents checking a child's age for school admission, adults filling in a form, job seekers checking an age limit, and anyone who wants to know how many days they have lived.
Age matters in many parts of life. Schools, driving licences, passports, visas, insurance plans, pension schemes and job applications all ask for your age or your date of birth. A small mistake can cause a form to be rejected, so it is worth checking your exact age before you write it down. This age calculator is also fun to use: many people like to see their total days lived, or to count down the days to their next birthday.
Take a person born on 15 June 1990. On 10 November 2026, this age calculator gives an age of 36 years, 4 months and 26 days. That is because 36 full years passed on 15 June 2026, and then 4 months and 26 days passed after that. The same person has lived for about 13,297 days in total, and their next birthday, on 15 June 2027, is 217 days away. Try it yourself: enter any date of birth above and compare the result with your own calculation.
Age is counted in full calendar years, months and days. First, the calculator finds the number of full years between your date of birth and today. Then it counts the full months that have passed since your last birthday, and finally the remaining days. Leap years are handled correctly: a person born on 29 February has a birthday on 28 February in non-leap years for most official purposes, and the calculator counts the extra leap days in the total days lived.
Use your official date of birth. Always use the date shown on your birth certificate, passport or national ID card, because forms are checked against official records. Double-check the year. Most age mistakes come from typing the wrong year, so read the result once before you use it. Count months for babies. For a baby under one year old, the months and days result is often more useful than the years result. Plan ahead. Use the days to your next birthday to plan a party, a holiday or a gift in good time. Check age limits early. If a job, exam or licence has a minimum or maximum age, check your exact age well before the last date to apply.
Take a person born on 1 January 2000. On 10 November 2026, this age calculator gives an age of 26 years, 10 months and 9 days. That is because 26 full years passed on 1 January 2026, then 10 months passed, and then 9 more days. The same person has lived for 9,810 days in total, which is 322 months, and their next birthday on 1 January 2027 is 52 days away. Try it yourself: enter 1 January 2000 as the date of birth and check that your result matches.
Typing the wrong year. Most age errors come from one wrong digit in the year, so always double-check it. Mixing up day and month. In some countries dates are written month first and in others day first, so check which order your browser expects. Forgetting leap years. A rough count of 365 days per year misses the extra leap days; this calculator counts them for you. Using an approximate age on official forms. Always use your exact age from your birth certificate or ID card, because forms are checked against official records. Counting age from the wrong date. Age is counted from the date of birth, not from a registration or admission date.
Pro Tip: If you need someone's age on a future date, such as an exam date, calculate their age today and add the days between today and that date.
Note: This calculator uses your device's current date. If your device date is wrong, the result will be wrong too, so check your device clock first.
Is this age calculator accurate? Yes. It uses your device's current date and counts full calendar months and days, including leap years, so the result is exact for the day you check it.
How is age in months calculated? The calculator counts the full months since your last birthday and adds 12 months for every full year. For example, a person who is 36 years and 4 months old has lived for 436 months.
What if I was born on 29 February? In leap years your birthday falls on 29 February. In other years most people celebrate on 28 February or 1 March, and official records usually use 28 February. The total days lived is still counted correctly.
Can I calculate the age of someone else? Yes. Enter their date of birth and the calculator will show their exact age, total days lived and days to their next birthday.
Does this tool save my date of birth? No. The calculation happens in your browser only. Your date of birth is never sent to our servers or stored anywhere.
Can I calculate age for a future date? This tool calculates your age as of today. If you need your age on a future date, add the days between today and that date to the result shown here.
How many days are there in 26 years? It depends on the leap years inside them. A person born on 1 January 2000 had lived 9,810 days by 10 November 2026, because 26 years contain 7 leap days.
Can I use this calculator for a baby? Yes. For a baby under one year old, the result shows 0 years with the months and days, which is exactly what parents and doctors need.