Age Calculator
Calculate exact age with fun facts, zodiac signs, planet ages, and life milestones.
Free & unlimited
Date of birth
Calculate to date
Enter your date of birth to get started.
All processing happens in your browser. No data is sent to any server.
About this tool
- 1
Enter your birthdate
Select or type your date of birth using the date picker.
- 2
Set the target date
By default it calculates age as of today. Change the target date to calculate age at any point in time.
- 3
View your exact age
See your age broken down into years, months, days, hours, and even seconds.
- The tool accounts for leap years when calculating the exact number of days.
- Set a future target date to find out your age on a specific upcoming date.
- Use two birthdates with a shared target to compare ages between two people.
- Some countries calculate legal age differently - this tool uses the standard Gregorian calendar method.
- Exact age in years, months, and days
- Total days, hours, minutes, and seconds lived
- Custom target date for historical or future age calculation
- Next birthday countdown
- Calculate exact age for legal documents and forms.
- Determine the age difference between two people.
- Find out how many days until your next birthday.
- Verify age eligibility for programs or milestones.
It uses the Gregorian calendar rules: a year is a leap year if divisible by 4, except for years divisible by 100 unless also divisible by 400. February 29 birthdays are correctly handled.
It is accurate to the day based on calendar math. The seconds count assumes a start time of midnight on your birthdate and current time on the target date.
On non-leap years, the tool considers your birthday as March 1 for age calculation purposes, which matches the convention used in most legal systems.