Whether you need your precise age for a passport application, pension calculation, medical form, or you're simply curious how many days you've been alive — this free age calculator gives you the exact answer instantly.
Enter your date of birth and click Calculate. You'll see your age in years, total months lived, total days lived, and how many days until your next birthday.
Enter your date of birth and see your exact age in years, months and days
Enter your date of birth and click Calculate. You'll instantly see your exact age in years, the total number of months you have lived, the total number of days you have been alive (correctly accounting for leap years), and a countdown to your next birthday.
Your exact age matters more often than you might think. State Pension eligibility in the UK is based on reaching a precise age threshold. Many health screening programmes — including NHS bowel cancer screening, breast screening, and AAA screening — trigger at specific ages. Insurance premiums, mortgage applications, and HR calculations all sometimes require your exact age in years and months rather than just the year you were born.
This calculator is also useful for anyone curious about milestones — how many days have you been alive, when is your 10,000th day, or exactly how long until your next birthday?
Your age in complete years is the number of full birthday anniversaries since your date of birth. Total days lived is calculated precisely, including all leap years — a leap year adds one extra day every four years (with exceptions for century years). The next birthday countdown shows the number of days remaining until your next birthday in the current calendar year, or next year if your birthday has already passed this year.
Last updated: May 2026