Age Calculator (Years, Months, Days)
Result
Age Calculator (Years, Months, Days) The Age Calculator (Years, Months, Days) shows your exact age split into years, months and days from your date of birth, plus a combined 'exact age' line. Enter your birth date to see how old you are today. — free online calculator.
Formula
- Exact age in years, months and days calculator. This page explains the stated calculation method and provides a worked example.
- The main inputs are Date of birth, Calculate age on. Enter them in the units and format shown in the calculator.
- Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Age Calculator (Years, Months, Days)
- Date of birth: 1990-01-01
- Calculate age on: 2026-10-31
From 2000-01-15 to 2026-03-20 the elapsed calendar age is 26 years, 2 months, 5 days.
Sample result: Calculating…
Frequently asked questions
What does the Age Calculator (Years, Months, Days) calculate?
Month lengths and leap years are handled by calendar-date difference.
Which values should I enter?
Enter Date of birth, Calculate age on using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Exact age = Calendar difference between birth date and target date.
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.