Enter Two Calendar Dates
Exact Age
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Choose a date of birth
Total Months
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Total Weeks
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Total Days
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Next Birthday
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How to Calculate Age
Calculate your exact age in years, months, and days between two dates.
1
Enter Date of Birth
Select your birth date from the date picker.
2
Select Reference Date
Choose the date you want to calculate age on (defaults to today).
3
View Results
See your exact age, total days, weeks, months, and next birthday countdown.
Frequently Asked Questions
Does the calculator use today's date automatically?
Yes. The age-on field defaults to today according to your device's local calendar, and you can replace it with any valid date.
Why is total months not the same as days divided by 30?
Total months counts completed calendar months. Calendar months contain 28, 29, 30, or 31 days, so dividing by 30 would only be an approximation.
How are leap-day birthdays handled?
A 29 February anniversary clamps to 28 February in a non-leap year for this calculator's calendar arithmetic.