Age Calculator
Use this free age calculator to find exact age in years, months, and days from a date of birth. You can also calculate age on a target date or compare two birthdays to find the age difference. This online age calculator is fast, clear, and useful for everyday date questions, school forms, legal age checks, and birthday planning.
Choose an age calculator method
This age calculator supports exact age from date of birth, age on a future or past date, and age difference between two people so you can solve date-of-birth questions in the format you already have.
Age calculation steps used
This tool shows the date logic behind the result so the age answer is easier to understand, not just verify.
Age calculator formulas used
What this age calculator can do
This online age calculator helps you calculate exact age from date of birth without counting dates by hand. It works well for birthday checks, form filling, school age rules, insurance paperwork, travel forms, and general date-of-birth questions. You can use it as an exact age calculator, date of birth calculator, or birthday age calculator depending on your need.
FAQ
How does this age calculator work?
It compares a birth date with a target date and breaks the difference into years, months, and days. It also shows total months and total days for a more complete age view.
Can I calculate age on a future date?
Yes. Use the Age on Date tab to calculate how old someone will be on any future or past date.
Does this age calculator handle leap years?
Yes. It uses real calendar dates, so leap years and month lengths are included automatically.
Why might two age formats look different?
Total days, total months, and years-months-days describe the same time span in different ways. The exact age format is usually the easiest for everyday use.