Wondering exactly how old you are or how old someone will be on a future date? The Age Calculator makes it easy. Just enter a date of birth and a target date, and you’ll instantly get the person’s age in years, months, days, and even down to the seconds. Whether it’s for official records, planning events, or personal curiosity, this tool delivers fast, accurate results in just a click.

What Is the Age Calculator?

The Age Calculator is a precision tool designed to calculate a person’s age from their date of birth to a specific date, most often the current date. With just two inputs, the tool gives an instant and highly accurate result in: Years, Months, Days, Hours, Minutes, Seconds.

Whether you’re calculating someone’s age for school enrollment, documentation, personal milestones, or official records, this tool ensures clarity and convenience. For other time-related calculations, like figuring out durations between events, check out Time Calculator.

Notable Features of the Age Calculator

Calculates exact age between two dates
Displays age in years, months, days, hours, minutes, and seconds
Easy-to-use interface with calendar input
Works with future or past date comparisons
Compatible with all devices – no downloads needed
100% free and browser-based

Age Calculation Example:

If you were born on April 3, 2020 and the current date is May 13, 2025, the calculator shows:

Your age is: 5 years

= 5.10883 years

= 61.30595 months

= 266.57143 weeks

= 1,866.00000 days

= 44,784.00000 hours

= 2,687,040.00000 minutes

= 161,222,400.00000 seconds

= 5 years, 1 month, 9 days

How Does the Age Calculator Work?

Select “Date of Birth”: Choose the birth date using the calendar or enter it manually.
Select “Age at the Date of”: Choose today’s date or any specific future/past date.
Click "Calculate": The tool instantly displays your full age with detailed breakdowns.
Click “Today” to instantly fill in the current date.You can reset and repeat the process anytime for different inputs.

Tips for Avoid Mistakes

Tip 1: The calculator accounts for leap years (like Feb 29), ensuring accuracy even in complex cases.

Tip 2: Ensure the date format follows MM/DD/YYYY or DD/MM/YYYY depending on your regional setting.

Tip 3: For important documents, verify the result with a physical calendar or alternative method.

Age & Cultural Differences

Age is calculated differently around the world. This Age Calculator uses the Western method, where age increases on each birthday. For example, someone born on April 3, 2020, turns five on April 3, 2025.

In contrast, East Asian cultures often follow a traditional system where a person is considered 1 year old at birth, and age increases by one every Lunar New Year. This can make someone appear one or two years older than in Western systems.

To maintain global consistency, this tool uses the Western age-counting method, which is widely accepted in international and legal contexts.

Explore more ways to work with age and time using our Time and Date Calculators. Whether you’re tracking early milestones with the Baby Age Calculator, checking eligibility with the School Age Calculator, diving into cultural traditions with the Lunar Age Calculator, or comparing ages with the Age Difference Calculator, we’ve got tools to make every calculation simple and precise.

Alternative Methods to Calculate Age

Manual Method

Subtract the birth year from the current year. Adjust based on whether the birthday has passed or not.

Example: Born Dec 1, 2000 → Jan 1, 2024 = 24 years old if the birthday hasn’t occurred yet this year.

East Asian Method

Add 1 year at birth and increment age every Lunar New Year.

Example: Dec 1, 2000 → Jan 1, 2024 = 25 years old

Calculate Age in Spreadsheets

Great for schools, HR, and records management.

Here’s how to do it in Excel or Google Sheets:

Step 1: Enter birthdate in A2

Step 2: Enter current date or =TODAY() in B2

Step 3: Use these formulas:

Age in years: =INT((TODAY()-A2)/365)

Months after full years: =DATEDIF(A2,B2,"YM")

Days after full months: =DATEDIF(A2,B2,"MD")

Common Uses of the Age Calculator

School Admissions: Quickly check age eligibility for enrollment.
Medical Records: Input accurate patient age in health databases.
Birthday Planning: Know exactly how old someone is turning.
Event Scheduling: Use age milestones to plan anniversaries or parties.
Official Documentation: Determine legal age for licenses, IDs, etc.

The Age Calculator is one of the simplest and most powerful tools to determine someone's exact age in multiple formats. Whether you're planning a celebration, completing paperwork, or just curious, this tool gives you an instant and error-free result down to the second.

Try the Age Calculator today and take the guesswork out of age calculations!