Age Calculator
Calculate exact age in years, months, days and more.
Exact age
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Continue your work
- Date Difference Calculator — Count days between other calendar dates.
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Clear instructions
Find steps, examples and limitations below.
Use online
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Free to use
No sign-up required. Tool-specific limits may apply.
How to use the Age Calculator
Calculate a calendar age between a birth date and a selected comparison date.
- 1 Enter Date of birth.
- 2 Set Age at the date of to today or another date.
- 3 Read Exact age and the totals shown below it.
Example and practical tips
Compare a birth date of 2000-01-01 with 2026-01-01 to obtain 26 calendar years.
Frequently asked questions
Does it calculate the exact time since birth?
The controls take dates rather than a birth time. Hour totals are date-based estimates, not a time-of-day record.
Can I use this to decide a legal age deadline?
Check the applicable official rules. This utility calculates date differences and does not determine jurisdiction-specific eligibility.