Age Calculator
Enter your date of birth and get your exact age in years, months, days — plus your next birthday countdown.
Date of Birth
💡 Definition
Age Calculation
- Age calculation involves computing the difference between two dates accounting for varying month lengths and leap years.
- This tool gives you exact age in years, months, and days, plus fun extras like total days lived and next birthday countdown.
📖 How to use
Step by Step
- Enter your date of birth using the date picker
- Your exact age appears instantly in multiple units
- See your next birthday countdown
- All calculations account for leap years
🎯 Use cases
When to use
- Finding exact age for forms and applications
- Birthday countdown tracking
- Age verification calculations
- Fun statistics about your life
Frequently Asked Questions
How is age calculated?▾
Age is calculated by counting complete years, then remaining complete months, then remaining days from your date of birth to today. Leap years are accounted for.
What is a leap year?▾
A leap year has 366 days (February 29). It occurs every 4 years, except centuries not divisible by 400. So 2000 was a leap year but 1900 was not.