Age Calculator
Use this Age Calculator to calculate age, birthdays, retirement timeline, and total time lived in one place.
Use this Age Calculator to calculate age, birthdays, retirement timeline, and total time lived in one place.
Use this Age Calculator to calculate age from date of birth instantly. Enter your birth date and a reference date to find your exact age in years, months, weeks, days, hours, minutes, and seconds.
The calculator also shows your next birthday countdown, half-birthday, birthday weekday, total time lived, and retirement estimates.
Using our age conversion tool is simple. All you have to do is follow these steps:
You can use future dates to calculate your age at a later point or historical dates to determine age in the past.
After entering your dates, the calculator provides a complete breakdown.
Shows your age in years, months, and days.
Displays the date used as the reference point for calculation.
Shows the birth date entered for calculation.
Displays when your birthday occurs during the selected year and identifies the weekday.
Shows the date exactly six months after your birthday.
Displays the countdown until your next birthday.
Retirement estimates are based on a default retirement age of 65. Actual retirement ages vary by country, employer, and personal circumstances. The calculator shows:
Shows total time lived in:
Users choose this calculator because it offers more than a standard age result.
Calculate age accurately between any two dates with automatic handling of month lengths and leap years.
View age and date differences in years, months, weeks, days, hours, minutes, and seconds.
See when your birthday occurs in the selected year, how many days remain until your next birthday, and your half-birthday date.
Estimate how much time remains until retirement using a retirement age of 65 and see the projected retirement year.
Enter two dates, click Calculate, and instantly view all results.
Use the calculator directly in your browser.
This calculator works as both an age calculator and a date duration calculator.
You can use it to answer questions like:
You can also use the calculator to answer more specific questions, such as:
Since results are available in multiple units, you can analyze both short and long periods of time.
Age calculation is based on the difference between the starting date and the ending date. Now, most age calculators are quite simple and therefore give wrong answers due to not accounting for leap years and 31-day months.
Our age calculator accounts for such specifics. For example, it accounts for:
This allows the results to remain accurate even when calculating across leap years and different month lengths.
Time duration can be represented in different ways depending on what you want to measure.
For example, a duration can appear as:
Each format describes the same period but provides a different perspective. Our age calculator shows all of them simultaneously, so you don’t have to do different conversions inside your head.
This calculator is useful for many personal and professional situations. It can be useful in the following situations:
Besides age calculation, the tool helps track meaningful milestones in life. These are mostly related to your birthdate. Here are some examples:
These insights make the calculator useful beyond simple date subtraction.
To give you a better idea of how our tool works, we have curated some examples that you can test and verify yourself.
Date of Birth: March 12, 2001
Find Age On: December 15, 2025
Result of Age Calculation:
Age in Standard Format: 24 years 9 months 3 days
Months lived: 297
Weeks lived: 1,292
Days lived: 9,044
Date of Birth: July 5, 1995
Find Age On: July 5, 2030
Result of Age Calculation:
Age in Standard Format: 35 years
Days left to birthday: 0
Months Lived: 420
Weeks Lived: 1,826
Days Lived: 12,784
Yes. You can calculate the age for any date. You can directly input a date rather than select it from a calendar dropdown menu, which makes it easy to add any date of your choice.
Yes. Leap years are automatically included in calculations. Aside from that, months with 28, 29, 30, and 31 days are also correctly accounted for.
Yes. The calculator works for age calculations and general date duration calculations. It will still give the answers in the context of age, but you can easily interpret them as the difference between two specific dates.
The retirement estimate uses a fixed retirement age of 65. For now, you cannot change it, so all relevant calculations are still based on that number.
A half-birthday is the date that occurs six months after your birthday. Alternatively, you can say that the date six months before your next birthday is known as the half-birthday.
While the standard age format is useful, viewing your age in total months, weeks, days, hours, or minutes provides additional insight into how much time has passed.
Yes. The calculator provides age in weeks as part of the total time lived breakdown. Aside from that, you also get it in years, months, hours, minutes, and seconds.
The ending date defaults to the current date but can be changed to any date.
You can calculate that easily by entering today's date and the date of birth in 2006 into the age calculator. In 2026, the answer to that will be 19-20 years, depending on the exact date of birth.