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Age Calculator

Age Calculator from Gizcalc helps you estimate results quickly within the Date & Time category.

  • Instant results
  • Charts & tables
  • Save & compare
  • Private – runs in your browser
Age —

Sample inputs are pre-filled so you can see a result quickly. Results are estimates only and may not be accurate because prices, interest rates, taxes, fees, fuel costs, tariffs, market returns, medical costs, and local rules can change. Please verify current values before making financial, tax, legal, medical, or business decisions.

Formula used

Age = Date − Date of birth, counted in whole years, then whole months, then days

About the Age Calculator

What is the Age Calculator?

This age calculator gives your completed age in years, months and days on any date – the format used in school admissions, exam forms and government applications.

It also shows the total days and weeks you have lived, the weekday you were born and how long until your next birthday.

How to use the Age Calculator

  1. Date of Birth (sample: 15 Jun 1995)
  2. Age on Date — set this to a cut-off date (for example 1 April for school admission or the exam's age reference date). (sample: 22 Oct 2026)
  3. Press Calculate Age (results also refresh as you type). The result card shows the Age, along with Completed years, Total months, Total weeks and Total days.

Formula used

Age = Date − Date of birth, counted in whole years, then whole months, then days

People born on 29 February celebrate on 28 February in non-leap years here.

Worked example

These are the sample values already filled in the calculator above, and the result it returns for them:

InputSample value
Date of Birth15 Jun 1995
Age on Date22 Oct 2026
ResultValue
Age31 years, 4 months, 7 days
Completed years31
Total months376
Total weeks1636 weeks, 0 days
Total days11,452
Born on aThursday
Next birthdayTue, 15 Jun 2027 (turning 32)
Days to next birthday236

Tips for using the Age Calculator

  • Exam notifications state an "age as on" date – enter that date, not today's.
  • For age down to the hour and minute, use the exact age calculator.

Frequently asked questions

Count completed years, then completed months after the last birthday, then the remaining days.

Usually your completed age in years on the date the form specifies.

The calculator shows your total days lived, counted from your date of birth to the chosen date.