How to Calculate Age
Calculating your exact age involves finding the difference between your date of birth and the current date. While it may seem straightforward, accurate age calculation must account for varying month lengths (28, 29, 30, or 31 days), leap years, and the specific day of the month. Our calculator handles all of these edge cases automatically, giving you a precise breakdown of years, months, and days.
Age Calculation Method
The most common age calculation method works as follows:
Step 1: Years
Subtract the birth year from the current year. If the birth month and day have not yet occurred this year, subtract one from the result to get complete years.
Step 2: Months
Count the number of complete months from the birth month to the current month, adjusting if the current day is before the birth day.
Step 3: Days
Count the remaining days after the last complete month. If the current day is less than the birth day, borrow days from the previous month.
Zodiac Signs by Date
| Sign | Symbol | Dates | Element |
|---|---|---|---|
| Aries | ♈ | March 21 - April 19 | Fire |
| Taurus | ♉ | April 20 - May 20 | Earth |
| Gemini | ♊ | May 21 - June 20 | Air |
| Cancer | ♋ | June 21 - July 22 | Water |
| Leo | ♌ | July 23 - August 22 | Fire |
| Virgo | ♍ | August 23 - September 22 | Earth |
| Libra | ♎ | September 23 - October 22 | Air |
| Scorpio | ♏ | October 23 - November 21 | Water |
| Sagittarius | ♐ | November 22 - December 21 | Fire |
| Capricorn | ♑ | December 22 - January 19 | Earth |
| Aquarius | ♒ | January 20 - February 18 | Air |
| Pisces | ♓ | February 19 - March 20 | Water |
Fun Age Facts
Heartbeats
The average human heart beats about 100,000 times per day. By age 30, your heart will have beaten over 1 billion times.
Breaths
A person takes about 20,000 breaths per day. Over a lifetime of 80 years, that adds up to roughly 600 million breaths.
Sleep
By age 75, the average person will have spent about 25 years sleeping. That is one-third of an entire lifetime.
Blinking
You blink about 15-20 times per minute. Over a year, that is about 10 million blinks. Over a lifetime, you will blink over 700 million times.
Earth Orbits
Every year you complete one full orbit around the Sun, traveling about 940 million kilometers (584 million miles) through space.
Hair Growth
Your hair grows about 15 cm (6 inches) per year. Over 70 years, a single strand could theoretically grow to over 10 meters (33 feet).
Frequently Asked Questions
The calculator finds the difference between your date of birth and the current date (or a custom date you specify). It computes the exact number of complete years, months, and remaining days, then derives totals for months, weeks, days, hours, and minutes.
Yes. The calculator uses JavaScript's built-in Date object which accounts for leap years, varying month lengths (28, 29, 30, or 31 days), and daylight saving time transitions automatically.
Starting from the birth date, we count complete calendar months forward to the 'as of' date. The remaining days after the last complete month are counted as the 'days' portion. For example, from January 15 to March 10 is 1 month and 23 days (Jan 15 to Feb 15 is 1 month, Feb 15 to Mar 10 is 23 days).
Enter your date of birth in the date picker and the calculator will instantly show your exact age in years, months, and days, as well as your total age in months, weeks, days, hours, and minutes.
Yes. By default the calculator uses today's date, but you can change the 'Calculate as of' field to any date. This lets you find the age or time difference between any two dates.
The zodiac sign is determined by the month and day of your birth using standard Western astrology date ranges. For example, if you were born between March 21 and April 19, your sign is Aries.
The calculator finds the next occurrence of your birth month and day after the 'as of' date, then counts the days between. If today is your birthday, it shows the days until your next one.
Absolutely. This age calculator runs 100% in your browser using client-side JavaScript. No data is sent to any server. Your date of birth is never stored or transmitted anywhere.