Age Calculator
Calculate an exact age in years, months and days from a date of birth — plus totals in weeks and days.
Age
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Enter a date of birth to begin.
About the age calculator
This age calculator works out an exact age from a date of birth, expressed in years, months and days, and also shows the total elapsed time in months, weeks and days.
Leave the second date blank to calculate age as of today, or enter a specific date to find how old someone was — or will be — on that day.
Frequently asked questions
How is age calculated in years, months and days?
The calculator counts complete years, then complete months, then remaining days between the two dates, adjusting for months of different lengths and leap years.
Does it account for leap years?
Yes. Day and month calculations use the actual calendar, so leap years and months of different lengths are handled correctly.
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