Age Calculator
Find your exact age in years, months and days, plus total days, weeks and the countdown to your next birthday.
Forms, visas, school admissions and insurance often ask for an exact age on a specific date. Enter a date of birth and this calculator gives the precise answer, along with totals and a countdown to the next birthday.
How to use the Age Calculator
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Enter the date of birth
Pick the date using the calendar or type it in.
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Choose the second date
It starts as today. Change it to find someone’s age on a past or future date.
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Read the results
See years, months and days, plus totals and the next birthday.
Features
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Exact age
Years, months and days, taking real month lengths and leap years into account.
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Age on any date
Check eligibility for a deadline, exam or retirement date.
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Totals
Total months, weeks, days and hours lived.
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Birthday countdown
Days until the next birthday, including leap day birthdays.
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Day of the week
Find out which day of the week you were born on.
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Private
Dates are calculated in your browser and never stored.
When to use it
Application forms
Many forms ask for age on a cut off date, for example 1 January.
School admissions
Check whether a child meets the minimum age by the start of term.
Milestones
Find out when you turn 10,000 days old, or plan a birthday surprise.
Records and paperwork
Work out age at the time of an event for reports and documents.
How exact age is calculated
The calculator counts full years first, then full months, then the remaining days. When the day of the month has not been reached yet, it borrows the length of the previous month, so the result matches how people normally state their age.
Born on 29 February?
In years without a 29 February, the countdown uses 28 February as the birthday. Legal rules about leap day birthdays differ between countries, so check the local rule for official purposes.
Age rules that catch people out
Many applications ask for your age “as on” a cut off date rather than today. A candidate born on 15 March 2004 is 21 years old on 1 January 2026 but 22 on 1 April 2026, which can decide whether they are eligible. Set the second date to the cut off to check.
Some systems count age differently. In parts of East Asia a traditional age system starts at one at birth, and some legal rules count a person as reaching an age the day before their birthday. For official documents, follow the rule stated by the organisation asking.
When planning a celebration, the total days figure is handy: 10,000 days is just over 27 years and 4 months, a fun milestone that most people never notice. Total weeks is useful for tracking a baby’s age in the first year, when doctors and parents often count in weeks rather than months.
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth. The calculator shows your age in years, months and days as of today.
Can I calculate age on a specific date?
Yes. Change the second date to any past or future day.
How many days old am I?
The Total days figure shows exactly that, counted from your date of birth to the second date.
Does it handle leap years?
Yes. Real month lengths and leap years are used in every calculation.
What day of the week was I born?
It is shown in the results as Day you were born.
Is my date of birth stored?
No. Everything is calculated in your browser and nothing is saved.