Enter dates

Age calculator input

Format: YYYY-MM-DD (e.g. 1990-06-15)
Format: YYYY-MM-DD · or use the Today button
Results

Enter your date of birth to see your exact age and interesting facts about your life.

How does the age calculator work?

Simple, precise and instant – no button clicking required

Enter your date of birth

Choose your birth date – year, month and day. The calculator accepts any date from 1900 to today.

Choose the target date

Today's date is used by default. You can change it to calculate your age at any other point in time.

View your results

You'll see your exact age to the day, the day of the week you were born, your zodiac signs, your next birthday countdown and much more.

Share your result

Hit the Share button – your result will be copied to the clipboard or the native share dialog will open.

Zodiac signs & Chinese horoscope

The calculator automatically determines your Western zodiac sign and your Chinese zodiac animal based on your date of birth.

Western zodiac

12 signs from Aries to Pisces. Determined by your birth month and day. Each sign carries unique traits and symbolism.

Chinese zodiac

A 12-year cycle based on your birth year. Dragon, Tiger, Monkey and others – every year has its own animal symbol.

Next birthday

The calculator shows exactly how many days remain until your next birthday, with the precise date and day of the week.

Frequently asked questions about age calculation

Answers to the most common questions about age and life statistics

Your age is calculated from your date of birth to the selected date, measuring the exact difference in years, months and days. The calculator automatically accounts for leap years and the different lengths of each month.
Your Western zodiac sign is determined by your birth month and day – each sign covers a specific date range (e.g. Aries: March 21 – April 19). The Chinese zodiac animal is based on your birth year in a 12-year cycle starting from 1900.
Life facts are calculated using statistical averages: the average person breathes ~20,000 times/day, the heart beats ~100,000 times/day, eyes blink ~15,000 times/day, ~2 kg of food is consumed per day, and average sleep is 8 hours/day. These figures are statistical estimates and individual results will vary.
The life progress bar shows what percentage of the average statistical life expectancy (~80 years globally) you have already lived. It's a visual and philosophical indicator – a reminder of how much of your life has passed and how much may still lie ahead.
No. The calculator runs entirely in your browser – no data is sent to any server. Your date of birth is never stored or shared anywhere.
Simply enter your date of birth – the result will instantly show the day of the week (e.g. "You were born on a Wednesday"). The calculator uses the precise Zeller algorithm to determine the weekday.
The calculator automatically shows how many days remain until your next birthday, along with the exact date. If today is your birthday – that's recognised too and highlighted in your results.

Age calculation – everything you need to know

An age calculator is a simple and fast tool that lets you find your exact age down to the day. Unlike a simple year subtraction, a precise age calculation accounts for leap years, varying month lengths and your exact date of birth.

Beyond your exact age, our age calculator reveals a wealth of interesting facts: how many days, weeks, months or even hours you have been alive, what day of the week you were born, your zodiac sign and your Chinese zodiac animal.

The Chinese zodiac follows a 12-year cycle – each year is assigned one animal (Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, Pig). The cycle is counted from 1900.

The Western zodiac works differently – it is based on birth month and day, not the year. There are 12 signs: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces – each covering roughly 30 days.

Life statistics are a fascinating way to grasp the scale of your own existence. Over an average human lifetime, the heart beats around 2.9 billion times, the lungs take in more than 580 million breaths, and the eyes blink over 430 million times.