Calculators

Age Calculator

Calculate your exact age in years, months, weeks, days, hours, and minutes.

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Fast, secure & processed 100% locally in your browser

About This Age Calculator

This free online age calculator computes your exact age in years, months, and days based on your date of birth. Unlike basic calculators, it also shows your age in weeks, total days, hours, minutes, and seconds, and displays a live countdown to your next birthday. Whether you are filling out a form, checking milestone eligibility, or simply curious about how many days you have been alive, this tool provides precise, instant results with a beautiful, easy-to-read dashboard.

The tool is designed for anyone who needs to know their age — students, professionals, parents, researchers, or anyone curious about time. It works entirely in your browser, so your birth date is never uploaded, stored, or shared. You can switch to the Date Difference mode to calculate the exact duration between any two dates, which is handy for project timelines, anniversaries, or historical research.

How to Use the Age Calculator

Enter your date of birth in the first field.
Optionally add your time of birth for hour-level precision.
Change the "Calculate Age As Of" date if you want your age on a specific day (today is used by default).
Click Calculate Age. Your results appear instantly, along with detailed metrics, milestones, and a birthday countdown.
Use the Copy, Share, or Print buttons to save your result, or check the History section to compare multiple dates.

Key Features

Precise age calculation in years, months, and days — using accurate calendar math, not rough averages.
Multiple time units: total months, weeks, days, hours, minutes, and seconds you have been alive.
Next birthday countdown showing the exact days until your next birthday celebration.
Zodiac sign, birth day of the week, and other fun facts about your birth date.
Date Difference mode to measure the duration between any two dates for any purpose.
Session history that keeps your recent calculations handy for comparison.
100% private — all calculations run locally in your browser, no data is ever sent anywhere.

Frequently Asked Questions

How is age calculated exactly?

Age is calculated by comparing your date of birth to the target date, accounting for the varying number of days in each month and leap years. The tool determines completed years first, then completed months, then remaining days — the same way official age is determined in most countries.

Does the calculator account for leap years?

Yes. Leap years are handled precisely, so if you were born on February 29, the calculator correctly adjusts and reports your age accurately for non-leap years as well. Total days-alive calculations also include all leap days between the two dates.

Can I calculate the age between two arbitrary dates?

Absolutely. Switch to Date Difference mode and enter any two dates — the calculator will return the exact duration between them in years, months, days, and other units. This is useful for project timelines, anniversaries, and historical research.

Is my birth date stored anywhere?

No. Everything runs entirely in your browser using JavaScript. Nothing is uploaded, saved on a server, or shared with third parties. Even the History panel only exists for the current browser session and disappears when you reload the page.