Age Calculator

How old are you exactly? Not just in years — but in months, days, hours, and minutes? An age calculator answers that question with precision. Whether you need your chronological age for a form, want to know how many days until your next birthday, or are curious about fun facts like your zodiac sign and birthstone, this free online age calculator delivers instant results. Enter your date of birth, optionally pick any "as of" date, and see your complete age breakdown update in real time — entirely client-side, with zero data sent to a server.

What Is an Age Calculator?

An age calculator computes the exact time elapsed between two dates — typically your birth date and today's date. Unlike mental math or rough estimates, it accounts for varying month lengths and leap years to give you accurate years, months, and days. Our tool also converts your age into total days, weeks, hours, and minutes lived, shows how many days remain until your next birthday, and reveals the day of the week you were born along with your Western zodiac sign and birthstone.

How to Use the Age Calculator

1. Enter your date of birth — Select the day, month, and year you were born using the date picker.
2. Set the reference date — By default, age is calculated as of today. Click "Today" to reset, or pick any past or future date.
3. Read your exact age — See years, months, and days displayed prominently on the results card.
4. Explore the breakdown — View total days, weeks, hours, and minutes, plus days until your next birthday.
5. Check fun facts — Discover your zodiac sign, birthstone, and the weekday you were born.

Key Features

• Precise Age Breakdown

  Years, months, and days calculated with leap-year accuracy.

• Custom "As Of" Date

  Calculate how old someone was on any past or future date.

• Total Days, Hours & Minutes

  See your full age expressed in multiple time units.

• Birthday Countdown

  Know exactly how many days until your next birthday.

• Zodiac & Birthstone

  Western zodiac sign and traditional birthstone for your birth month.

• 100% Private

  All calculations run locally. Your birth date never leaves your device.

Common Use Cases

• Forms & applications

  Quickly verify exact age for school enrollment, job applications, insurance, or government documents.

• Historical age lookup

  Set a past "as of" date to find out how old someone was on a specific event — a wedding, graduation, or milestone.

• Birthday planning

  Use the countdown to plan celebrations and see which day of the week your next birthday falls on.

Frequently Asked Questions