Age Calculator: Find Out Exactly How Old You Are

What Does the Age Calculator Show?

Our age calculator provides a comprehensive breakdown of your age and related information:

• Exact age — Years, months, and days since your birth date.
• Total time alive — Your age expressed in months, weeks, days, and hours.
• Western zodiac sign — Your astrological sign with emoji (Aries through Pisces).
• Chinese zodiac animal — Based on your birth year (Rat, Ox, Tiger, etc.).
• Next birthday countdown — Exactly how many days until your next birthday.
• Birth details — The day of the week you were born, whether it was a leap year, and what season.

When Is an Age Calculator Useful?

You might think you always know your age, but precise age calculations matter more than you'd expect:

• Visa & immigration applications — Many require age as of a specific date, not just years.
• Insurance & retirement planning — Your exact age in months can affect premiums and eligibility.
• Medical records — Pediatric age is often measured in months and weeks.
• Legal milestones — Turning 18, 21, or retirement age on an exact date.
• Birthday planning — Know exactly how many days until the big day.
• Curiosity — "How many days have I been alive?" is a surprisingly fun question.

How to Use

1. Open the Age Calculator
2. Select your date of birth using the date picker
3. Optionally, set a custom "Calculate to" date (defaults to today)
4. Click "Calculate Age" or just change the date — results appear instantly
5. View your full age breakdown, zodiac signs, and birthday countdown

Pro tip: Use the "Calculate to" field to find out how old you'll be on a future date — like a wedding day, graduation, or retirement date.

How Accurate Is It?

Our calculator uses calendar-accurate math that properly accounts for:

• Varying month lengths (28, 29, 30, or 31 days)
• Leap years (including the century exceptions)
• Timezone-independent date calculation

The result is correct to the day. For hours and minutes, it uses the current local time on your device.

Zodiac Sign Guide

The calculator automatically determines your Western zodiac sign based on your birth month and day. It covers all 12 signs from Aries (March 21 – April 19) through Pisces (February 19 – March 20), using the standard tropical zodiac date ranges.

For Chinese zodiac, it's based on your birth year in a 12-year cycle: Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, and Pig.

Privacy

Your date of birth never leaves your browser. All calculations happen locally in JavaScript. No data is sent to any server, no cookies are set, and nothing is stored. Close the tab and it's gone.