Age Calculator

Our age calculator is extremely accurate and spot-on. The calculation logic correctly processes leap years and the precise number of days in each month to give you precise results.

Yes, our calculator fully supports both Gregorian and Hijri (Islamic) calendar calculations. You can easily switch between the two using the tabs at the top of the calculator.

The calculator provides your age in years, months, and even days, as well as a full breakdown in total weeks, hours, minutes, and seconds. It also includes a birthday countdown, your Western and Chinese zodiac signs, and other fun life statistics.

Absolutely. The algorithm is designed to handle leap years automatically, ensuring your age is calculated with the highest precision, whether you were born on February 29th or any other normal day.

Yes. Your privacy is paramount. All calculations are performed directly in your browser. We do not store your date of birth or any other personal information on our servers, or share with anyone.

Step 1: Write down today's date

Step 2: Write your birth date below it

Step 3: Subtract years first: 2025 (i.e. present year) - birth year

Step 4: If your birthday hasn't passed this year, subtract 1 from the result

Step 5: Calculate remaining months and days by counting forward from your last birthday

Example: Born March 15, 1990. Today is, say October 11, 2025.

Years: 2025 - 1990 = 35 years (birthday passed)

Months: March to October = 7 months

Days: 15th to 11th = subtract 4 days, so 6 months, 27 days

Result: 35 years, 6 months, 27 days old

To find your exact age in days, our calculator counts every single day from your birth date to today, including leap years.

Formula: (Current Date - Birth Date) = Total Days

Example: If you were born on January 1, 2000, and today is October 11, 2025:

• You have lived through 9,415 days
• This includes 6 leap years (2000, 2004, 2008, 2012, 2016, 2020, 2024)
• That's approximately 25.8 years of life experience

Use our calculator above to get your exact age instantly!

Your age in smaller time units reveals fascinating life statistics:

Conversion Formula:

• Minutes: Total Days × 1,440 minutes per day
• Seconds: Total Days × 86,400 seconds per day

Example for 25-year-old:

• Minutes alive: ~13,149,600 minutes
• Seconds alive: ~788,976,000 seconds
• Heartbeats: ~946,371,200 beats (avg 120 bpm from birth)

Our calculator shows these precise measurements for your birth date!

Your zodiac sign is determined by your birth date. Here are all 12 Western zodiac signs:

• Aries: March 21 - April 19 (♈ The Ram)
• Taurus: April 20 - May 20 (♉ The Bull)
• Gemini: May 21 - June 20 (♊ The Twins)
• Cancer: June 21 - July 22 (♋ The Crab)
• Leo: July 23 - August 22 (♌ The Lion)
• Virgo: August 23 - September 22 (♍ The Virgin)
• Libra: September 23 - October 22 (♎ The Scales)
• Scorpio: October 23 - November 21 (♏ The Scorpion)
• Sagittarius: November 22 - December 21 (♐ The Archer)
• Capricorn: December 22 - January 19 (♑ The Goat)
• Aquarius: January 20 - February 18 (♒ The Water Bearer)
• Pisces: February 19 - March 20 (♓ The Fish)

Our calculator displays both your Western zodiac sign and Chinese zodiac sign based on your birth year (Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, or Pig).

Age differences between calculators occur due to several technical reasons:

• 1. Leap Year Handling: Some calculators don't account for February 29th correctly, leading to 1-day errors for leap year births
• 2. Time Zone Differences: Calculations may use different reference times (UTC vs local time)
• 3. Rounding Methods: Some calculators round up or down differently for incomplete or partial days
• 4. Calendar Systems: Mixing Gregorian and Hijri calendars without proper conversion
• 5. Calculation Precision: Some use approximate month lengths (30 days) instead of exact days per month
• 6. Algorithm Differences: Different date subtraction methods can yield slightly different results

Our Solution: We use precise day-by-day counting with proper leap year handling, exact month lengths, and the Umm al-Qura algorithm for Hijri dates to ensure maximum accuracy.

To calculate the total hours you've been alive:

Formula: Total Days Alive × 24 hours per day

Example Calculations:

• 20 years old: ~7,305 days = 175,320 hours
• 30 years old: ~10,957 days = 262,968 hours
• 40 years old: ~14,610 days = 350,640 hours
• 50 years old: ~18,262 days = 438,288 hours

That's over a quarter million hours of life experience for a 30-year-old!

Fun Fact: If you've lived 262,968 hours, you've experienced:

• 15,778,080 minutes
• 946,684,800 seconds
• ~87,600 hours of sleep (assuming 8 hours/day)

Our calculator provides these exact details based on your specific birth date, accounting for all leap years and the number of days you've been alive.

Excel offers several methods to calculate age from a birth date:

Method 1: Years Only (Simple)

=DATEDIF(A1, TODAY(), "Y")

Where A1 contains the birth date. Returns age in complete years.

Method 2: Complete Age (Years, Months, Days)

=DATEDIF(A1,TODAY(),"Y")&" years, "&DATEDIF(A1,TODAY(),"YM")&" months, "&DATEDIF(A1,TODAY(),"MD")&" days"

This gives you the exact age format like "35 years, 6 months, 27 days"

Method 3: Total Days Alive

=TODAY()-A1

Returns the exact number of days you've been alive.

Method 4: Age with Decimal Years

=(TODAY()-A1)/365.25

Returns age as a decimal (e.g., 35.54 years). The 365.25 accounts for leap years.

DATEDIF Parameters Explained:

• "Y" = Complete years
• "YM" = Remaining months (after years)
• "MD" = Remaining days (after months)
• "D" = Total days between dates

Pro Tip: The DATEDIF function automatically handles leap years correctly. For exact calculations matching our online calculator, use Method 2 for the complete age breakdown.

Chronological age is your actual age based on your birth date - the number of years you've been alive. Biological age is how old your body appears to be based on your health, fitness, and cellular condition.

Example: A 40-year-old person who exercises regularly, eats well, and doesn't smoke might have a biological age of 35. Conversely, someone with poor health habits might have a biological age of 45.

Key Differences:

• Chronological: Fixed, based on birth date
• Biological: Variable, based on health and lifestyle
• Measurement: Chronological uses calendar time, biological uses health markers

Our calculator shows your chronological age - use it to track your actual time lived!

To calculate someone else's age using their birth date, follow these simple steps:

1. Get their birth date: Ask for their complete birth date (month, day, year)
2. Enter it in our calculator: Input the birth date in the "Date of Birth" field above
3. Set the calculation date: Use today's date or any specific date you want to calculate their age for
4. Get instant results: The calculator shows their exact age in years, months, and days

Example: If someone was born on March 15, 1995, and today is October 12, 2025:

• They are 30 years, 6 months, and 28 days old
• That's approximately 11,164 days of life

Perfect for: Planning surprise parties, calculating children's ages, or satisfying curiosity about celebrities' ages!

Age calculation varies between countries due to different cultural traditions, calendar systems, and counting methods developed over centuries.

Main Differences:

• Western System: Age starts at 0 at birth, increases on birthday
• Korean System (Traditional): Age starts at 1 at birth, increases on New Year's Day
• Chinese System: Traditional lunar calendar creates different age calculations
• Islamic System: Uses Hijri calendar with 354-355 days per year

Example: A baby born on December 31st in Korea would be 1 year old at birth, then turn 2 years old the next day (New Year's), while Western calculation would show 1 day old.

Our calculator uses the Western system but also supports Hijri calendar calculations for Islamic countries.

To find your exact birth time for precise age calculation, try these methods:

1. Birth Certificate: Most detailed birth certificates include the exact time of birth
2. Hospital Records: Contact the hospital where you were born - they may have detailed records
3. Ask Parents/Family: Parents often remember the birth time, especially for first children
4. Baby Book/Journal: Check family baby books or journals kept during your birth
5. Local Municipality Records Office: Contact your local birth registration office for registering and collecting your birth certificate

Why Birth Time Matters:

• More accurate age calculation down to hours, minutes, and seconds
• Important for astrological birth charts and horoscopes
• Legal documents sometimes require precise birth time

Don't have exact time? Our calculator works perfectly with just your birth date for accurate age in years, months, and days!