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Age Calculator

Use our free online Age Calculator to find out exactly how old you are in years, months, weeks, days, hours, and even minutes. Just enter your date of birth and let our tool do the rest.

Exact Age Calculator

Gregorian precision algorithm • Leap year verified

1 Date of Birth (DOB) *
DD / MM / YYYY
Day
/
Month
/
Year

Select your birth day, month, and year

2 Calculate Age As Of *
DD / MM / YYYY
Day
/
Month
/
Year

Defaults to today; or pick any target date

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Frequently Asked Questions

Frequently Asked Questions

Clear, straightforward answers to everything you need to know about age calculation.

How do I calculate my age?

To calculate your age, simply enter your Date of Birth in our calculator. The tool will automatically use today's date as the end date and instantly show your exact age in years, months, and days.

How does an age calculator work?

Our age calculator works by subtracting your date of birth from the current date. It handles complex calendar rules, including varying days in months and leap years, to ensure 100% mathematical accuracy.

Is my date of birth kept private?

Yes, absolutely. Our calculator operates entirely in your web browser using JavaScript. Your date of birth and personal data are never sent to our servers or stored anywhere.

Can I calculate my age on a future date?

Yes, you can change the 'Age at the Date of' field to any past or future date. This is useful for finding out how old you will be in a specific year or how old you were on a historical date.

How accurate is the age calculation?

The calculation is extremely accurate. We use standard chronological calendar math that accounts for leap years and the exact number of days in each specific month between the two dates.

Why do some months have 30 or 31 days in the calculation?

The calculation looks at the specific months between your birth date and the current date. If the time span includes a 31-day month, it counts those actual days, ensuring precise day counts.

How are leap years handled?

Leap years, which occur every four years and add an extra day to February, are automatically factored into the total days calculation. If a leap day (Feb 29) falls within the calculation period, it is accurately counted.

Can I find out the day of the week I was born?

Yes! When you calculate your age, our tool also reveals the specific day of the week you were born on, adding a fun historical fact to your result.

How do you calculate the age difference between two people?

To find the age difference, we take the older person's birth date as the start date and the younger person's birth date as the end date. We then calculate the exact years, months, and days between those two points.

What is chronological age?

Chronological age is the exact amount of time you have been alive from the moment of your birth to the present day. It is strictly based on the calendar and time passed, unlike biological age which relates to physical health.