Age Calculator
Calculate your exact age in years, months, days, hours, and minutes. Find out how many days until your next birthday and explore interesting age-related facts.
Enter a valid date of birth to see your age.
Interesting Age Facts
Average Human Lifespan
~79 years
Global average life expectancy (2023)
Days in a Year
365 / 366
Regular year / Leap year
Hours in a Year
8,760
8,784 in a leap year
Oldest Verified Person
122 years
Jeanne Calment (1875–1997)
How to Use the Age Calculator
- 1
Enter your date of birth using the date picker.
- 2
Optionally change the 'Age at date' field to calculate age at a specific date.
- 3
Your exact age in years, months, and days is shown instantly.
- 4
Scroll down to see your age in total days, hours, minutes, and days until your next birthday.
Age Calculation Formula
Age = (Target Date − Date of Birth)
Years = difference in calendar years (adjusted if birthday hasn't occurred yet this year)
Months = remaining months after full years
Days = remaining days after full months
Total Days = Σ days from birth date to target date (including leap years)Frequently Asked Questions
How is age calculated?
Age is calculated by finding the difference between your date of birth and today's date (or any target date). The result is expressed in years, months, and days, accounting for varying month lengths and leap years.
What is a leap year and how does it affect age?
A leap year has 366 days instead of 365, occurring every 4 years (except century years not divisible by 400). If you were born on Feb 29, your birthday is typically celebrated on Feb 28 or Mar 1 in non-leap years.
How many days old am I?
The total days calculation accounts for every calendar day from your birth date to today, including all leap years in between. Our calculator computes this automatically and precisely.
Can I calculate age between two specific dates?
Yes! Change the "Age at date" field to any date you want. This is useful for calculating age at a past event or a future milestone.
Why does age calculation differ across countries?
Most countries count age from birth (Western system). Some East Asian cultures traditionally count age differently — a person is 1 at birth and gains a year each Lunar New Year. Our calculator uses the standard Western method.
What is the legal age of majority?
The legal age of majority (adulthood) is 18 in most countries, including India. Some rights like voting, driving, and drinking have different age thresholds depending on local laws.