Age Calculator
Find your exact age in years, months, days, hours and minutes. Calculate the time between any two dates, find what day you were born, and see your next birthday countdown.
How Old Am I Today?
Age Between Two Dates
Age in Days Calculator
Age in Weeks Calculator
Age in Hours Calculator
What Date Will I Be X Years Old?
You will turn 25 years old on:
January 15, 2015
Thursday
Day of the Week I Was Born
You were born on a:
Monday
January 15, 1990
Next Birthday Countdown
Fun Facts About Your Birthday
How Age Is Calculated
Years, months, and days are calculated using calendar-aware logic — not just dividing milliseconds. The tool counts complete years elapsed, then complete months within the current year, then remaining days within the current month. This matches how age is conventionally and legally measured.
Total days is the exact number of calendar days between the two dates, including leap days.
Leap yearsare handled throughout — every February 29 is counted in the day total, and the "What date will I be X years old?" calculator correctly maps Feb 29 birthdays to Feb 28 in non-leap target years.
How to use Age Calculator
- 1Enter your date of birth
Use the date picker in the first section. A sample date is pre-filled so you can see results immediately — replace it with your own date of birth.
- 2See your exact age
Your age in years, months, days, hours, and minutes is calculated instantly and updates automatically as time passes.
- 3Explore other formats
Scroll down to see your age in total days, total weeks, or total hours lived. Each section is independent — enter a birth time for the hours calculator.
- 4Check your birthday countdown
The countdown section shows days, hours, minutes, and seconds until your next birthday, ticking live every second.
- 5Discover fun facts
Scroll to the fun facts section to see your Western zodiac sign, Chinese zodiac animal, birth month flower, birthstone, and how many leap years you have lived through.
- 6Share your age
Click the 'Share my age' button to copy a URL with your date of birth encoded in it. Anyone who opens the link will see your age results automatically.
Frequently Asked Questions
How is my exact age calculated?
- Age is calculated using calendar-aware logic, not just dividing milliseconds. The tool counts full years elapsed, then full months within the current year, and finally the remaining days within the current month. This matches the way age is legally and conventionally measured in most countries.
Does the tool account for leap years?
- Yes. Leap years are handled correctly throughout. For 'age in days', every day including February 29 in leap years is counted. For the 'What date will I be X years old?' calculator, if you were born on February 29 and the target year is not a leap year, the result is given as February 28 — the conventional treatment in most jurisdictions.
What day of the week was I born?
- The 'Day of the week I was born' section computes this using the browser's built-in date library, which correctly accounts for the Gregorian calendar reform and all historical month/year lengths. The result is accurate for any date from the year 1900 onwards.
How do you calculate age between two dates?
- Enter a start date and end date in the 'Age between two dates' section. The tool computes the exact number of years, months, and days between them using the same calendar-aware algorithm as the main age calculator. You can use any two dates — past, present, or future.
Is my date of birth stored anywhere?
- No. All calculations happen entirely in your browser. Your date of birth is never sent to any server. The 'Share my age' feature encodes your date of birth directly into the URL as a query parameter — no data is stored on our systems.
What does the 'days lived' progress bar represent?
- The progress bar shows what percentage of 80 years (29,200 days) you have lived. 80 years is a commonly cited global average life expectancy. The bar is purely illustrative — it is clamped at 100% for ages over 80, and the exact days count is always shown in the label regardless of the bar's position.