Exact Age Calculator (Years, Months & Days)
Local ProcessingCalculate exact international age in completed years, total elapsed months, and total elapsed days from birthdate.
How It Works & Processing Standards
Calculate exact international age in completed years, total elapsed months, and total elapsed days from birthdate.
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Current Limits
- Maximum input length: 100,000 characters
Enter a birth date to get the age on the reference date (today by default). Age increases only after the birthday, and total months and days are shown too.
What You Can Do
- Exact age
- Accounts for whether the birthday has passed on the reference date.
- Total months and days
- Months and days elapsed since birth.
How to Use Exact Age Calculator (Years, Months & Days)
- 1Enter birth dateAs YYYY-MM-DD.
- 2Set the reference dateChange it for the age on a specific date.
- 3Read the resultSee the age and total months and days.
Examples
Born 1990-05-15, on 2026-09-27
Input: 1990-05-15 / 2026-09-27
Result: Age 36, 436 months, 13,284 days
Born 29 February, on 28 February of a common year
Input: 2000-02-29 / 2026-02-28
Result: Age 26
Common Use Cases
- Checking age for forms and contracts
- Age eligibility on a specific date such as enrolment or an exam
- Counting how many days or months old a baby is
Frequently Asked Questions (FAQ)
When does someone born on 29 February age in a common year?
This tool treats 28 February as the birthday in common years. Some laws and institutions use 1 March instead, so check the rule that applies to you.