Use this free age calculator to find your exact age in years, months, days, hours, and minutes. Enter your date of birth to instantly calculate your precise age and see your next birthday countdown.
Age Calculator
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How to use this Age Calculator
1. Enter your date of birth using the date picker.
2. Click Calculate My Age to see your exact age in years, months, and days, plus your total age expressed in months, weeks, days, and hours.
3. The calculator also shows your next birthday date and how many days until it arrives. If today is your birthday, a special message appears instead.
Frequently asked questions
Q: How is exact age calculated?
A: Exact age is calculated by finding the difference between your date of birth and today's date in years, then calculating the remaining months and days. The calculator accounts for varying month lengths and leap years to give you a precise count. For example, someone born on January 31 who reaches February 28 has completed one month, not a partial month.
Q: What is a leap year and how does it affect age calculation?
A: A leap year occurs every four years and adds an extra day (February 29) to the calendar. People born on February 29 technically only have a birthday every four years. For age calculation purposes, leap year birthdays are typically celebrated on February 28 or March 1 in non-leap years, depending on preference. This calculator uses the actual calendar date for all calculations.
Q: How many days old am I?
A: Your total number of days alive is calculated by finding the difference between your birth date and today, counting each calendar day including leap years. For example, someone who is 30 years old has lived approximately 10,950 to 10,958 days depending on how many leap years fell within their lifetime.
Q: Can I use this to calculate someone else's age?
A: Yes — simply enter their date of birth instead of your own. This calculator works for any date of birth in the past. It is commonly used to quickly calculate ages for official forms, medical records, legal documents, or simple curiosity.
Q: What if I do not know my exact birth date?
A: If you only know the birth year, enter January 1 of that year as an approximation. The calculated age will be accurate to within one year. For the most accurate results, use the complete date of birth including the day and month.