Age Calculator
Calculate an exact age in years, months, and days, plus the next birthday countdown.
About the tool
What it does and what to expect
About the tool
What it does and what to expect
Exact age for forms and milestones
People use an age calculator for applications, school admissions, insurance forms, birthdays, and any situation where completed years alone are not precise enough. It reports calendar years, months, and days rather than dividing an approximate number of days.
A worked example
For a birth date of 15 March 2000 and an “age on” date of 20 July 2026, the result is 26 years, 4 months, and 5 days. It also shows total elapsed days and the countdown to the next birthday.
How it works
A simple, local workflow
How it works
A simple, local workflow
- 1Select the date of birth and the date on which you want the age calculated.
- 2The tool borrows calendar days and months where needed to produce an exact calendar age.
- 3It also calculates total elapsed days and finds the next occurrence of the birthday.
FAQs
Common questions
FAQs
Common questions
Why can age in days differ from years multiplied by 365?
Leap years contain an extra day, and calendar months have different lengths, so exact elapsed days will vary.
Does the calculator include today?
It calculates the elapsed duration between the two selected calendar dates; the starting instant itself is not counted as a full elapsed day.
Can I calculate age on a past date?
Yes. Set “Age on date” to any date on or after the birth date to calculate age at that time.
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Comments & feedback
Help make this tool better
Found an edge case or have a useful idea? Send a private note to the team. Your email app opens only after you choose to send.