Age Calculator
Calculate your current age from your date of birth. The result is expressed in completed years, months and days using the current calendar date.
Calculator
What is the Age Calculator?
Age is a calendar calculation rather than a simple division of days by 365. The number of days in a month and leap years affect the exact years-months-days result.
How the calculation works
The calculator compares the birth date with today's date, borrowing a month or year when the day or month difference is negative. Leap years and varying month lengths are handled by the browser's calendar functions.
Worked example
If the date of birth is 1 January 2000 and today's date is later in 2026, the calculator reports the completed years plus the remaining months and days. Changing the birth date changes the result immediately.
How to use this calculator
- Enter the values that apply to your situation.
- Check the rate, period and other assumptions before calculating.
- Click Calculate and review each part of the result, not only the headline number.
- Change one input at a time if you want to compare different scenarios.
How to interpret the result
Age is a calendar calculation rather than a simple division of days by 365. The number of days in a month and leap years affect the exact years-months-days result. Use the result as a planning estimate and compare it with the terms, rates or rules that actually apply to you.
Practical tips
- Enter the correct date of birth.
- Use the date picker on mobile where available.
- For official age verification, follow the document and eligibility rules of the relevant institution.
- Use the result as an everyday calculation rather than legal proof of age.
Important limitations
- The tool does not verify identity documents.
- Different institutions may define eligibility cut-off dates differently.
- It does not determine legal eligibility for a particular benefit or exam.
Frequently Asked Questions
How is age calculated?
It is calculated as the calendar difference between the date of birth and today's date.
Does it account for leap years?
Yes.
Is this an official government age calculator?
No.
Can I use it for an eligibility decision?
Use it only as a date calculation; check the institution's official eligibility rule.
Last reviewed: August 2026. Rate-sensitive rules and institutional terms can change; verify current information before making an important decision.