Age Calculator — Exact Age in Years, Months & Days
A percentage calculator works out percentages in seconds — what percent one number is of another, a percentage of a number, or how much a value has increased or decreased.
How it works
- Enter your date of birth.
- Your exact age is calculated instantly, including leap years.
- You also get your total days lived, weeks lived and next birthday.
Formula
Worked example
Someone born on 1 January 1995 is 31 years, 10 months and 5 days old on 6 November 2026, and has lived 11,632 days. Try your own date above for your exact age.
Frequently asked questions
How old am I today?
Enter your date of birth above and the calculator shows your exact age today in years, months and days.
How do I calculate age from a date of birth?
Subtract the birth year from the current year, then adjust for whether your birthday has happened yet this year. The calculator does this automatically, including leap years.
How many days old am I?
The calculator shows your total days lived as well as your age in years, months and days.
What is my exact age in years, months and days?
Your exact age counts full years first, then the whole months since your last birthday, then the remaining days.
Does the age calculator handle leap years?
Yes. It uses real calendar dates, so 29 February birthdays and leap years are handled correctly.
When is my next birthday?
The calculator shows the date of your next birthday and how many days are left until it.