Age Calculator
Calculate your exact age in years, months, and days, and find out when your next birthday is.
How this is calculated
Subtracts birth date from target date (or today), adjusting for month/day boundaries.
Frequently Asked Questions About Age Calculator
An age calculator determines your exact age in years, months, and days from your birth date. It also shows your total days lived and counts down to your next birthday.
How is exact age calculated?
Age is calculated by subtracting your birth date from today's (or a target) date, accounting for month and day boundaries. For example, if born January 15, 1990, and it's December 20, 2024, you're 34 years, 11 months, and 5 days old. This is more precise than just using the year.
Why does the calculator show months and days separately?
While we typically say our age in years, the months and days component matters for precision. Knowing you're 34 years 11 months old tells you you're almost 35, which is more informative than just "34 years old."
What is my total days lived used for?
Total days lived is interesting for perspective and milestones. For example, "I've lived 12,784 days" can motivate reflection. It's also useful for age calculations in scientific contexts or tracking specific health/wellness timelines.
How accurate is the birthday countdown?
The countdown is accurate to the day. It accounts for leap years, different month lengths, and today's exact date. If today is March 10 and your birthday is May 5, the countdown is exactly 56 days.
Can I calculate someone else's age?
Yes, just enter their birth date. You can also enter a target date to calculate what their age was on a specific date in the past or future. This is useful for historical information or age verification.
Does this account for leap years and February 29?
Yes, the calculator accounts for leap years. If you were born on February 29 (a leap day), the calculator handles this correctly and will show accurate ages even in non-leap years.