Age Calculator
Calculate your exact age in years, months, weeks, days, hours, and minutes. Find age on any date, calculate age difference between people, discover your zodiac sign, and track life milestones.
Enter Your Date of Birth
Select your birth date to see your age updating in real-time, with detailed breakdowns, birthday countdown, and zodiac signs.
Calculate Your Exact Age in Seconds
Have you ever wondered exactly how many days you've been alive? Or how old you'll be on a specific future date? Age is more than just a number—it's a collection of years, months, weeks, and days that tell the story of your life journey. Our Age Calculator goes beyond simple year counting to show you your precise age in multiple formats, helping you understand and celebrate every moment of your existence.
Whether you're planning a milestone birthday party, calculating retirement eligibility, tracking your baby's development in months, or simply curious about your age in days or hours, this calculator provides instant, accurate results. Enter your birth date and discover fascinating details about your age, including how many total days you've lived, when your next birthday is, your zodiac signs, and even calculate the age difference between you and loved ones.
How to Calculate Your Age
Enter Your Birth Date
Select your date of birth using the date picker or type it manually. Include the day, month, and year. The more accurate your birth date, the more precise your age calculation will be, including exact hours if you know your birth time.
Choose Calculation Type
Select whether you want your current age, your age on a specific date (past or future), or calculate the age difference between two people. Each option provides different insights into age and time.
View Detailed Results
See your age displayed in multiple formats: years and months, total months, total weeks, total days, total hours, and total minutes. The calculator also shows which day of the week you were born on and counts down to your next birthday.
Discover Extra Insights
Learn your Western zodiac sign, Chinese zodiac animal, birth stone, and see how your age compares to important life milestones. You can also calculate and compare ages with family members or friends.
Comprehensive Age Calculation Features
Exact Age Calculation
Calculate your precise age in years, months, weeks, days, hours, and minutes. Accurate to the second with leap year handling.
Birthday Countdown
See exactly how many days, hours, and minutes until your next birthday. Plan celebrations and never miss an important date.
Age on Any Date
Find out how old you were or will be on any specific date. Perfect for planning milestone birthdays or historical reference.
Age Difference
Calculate the exact age gap between two people in years, months, and days. Great for couples, siblings, or friends.
Zodiac Signs
Discover your Western zodiac sign and Chinese zodiac animal based on your birth date. Learn what your signs mean.
Birth Day Info
Find out which day of the week you were born on and interesting facts about your birth year and generation.
Understanding Your Age in Different Units
| Current Age | Age in Months | Age in Weeks | Age in Days |
|---|---|---|---|
| 1 year old | 12 months | 52 weeks | 365 days |
| 5 years old | 60 months | 261 weeks | 1,826 days |
| 10 years old | 120 months | 522 weeks | 3,652 days |
| 18 years old | 216 months | 939 weeks | 6,574 days |
| 25 years old | 300 months | 1,304 weeks | 9,131 days |
| 30 years old | 360 months | 1,565 weeks | 10,957 days |
| 50 years old | 600 months | 2,609 weeks | 18,262 days |
| 65 years old | 780 months | 3,391 weeks | 23,740 days |
| 75 years old | 900 months | 3,913 weeks | 27,393 days |
| 100 years old | 1,200 months | 5,217 weeks | 36,524 days |
Note: Values are approximate and include leap years. Exact calculations depend on the specific birth date and account for leap years every 4 years.
When You Need an Age Calculator
Birthday Planning
- Plan milestone birthday celebrations (16th, 18th, 21st, 30th, 50th)
- Count down days until your next birthday
- Calculate exact age for birthday party themes
- Find out which day of the week your birthday falls on
- Organize surprise parties with accurate age information
Baby & Child Development
- Track baby's age in weeks and months
- Monitor developmental milestones by age
- Calculate age for pediatrician appointments
- Determine age for school enrollment eligibility
- Track age gaps between siblings
Legal & Official Documents
- Verify age for legal requirements (voting, driving)
- Calculate age for retirement planning
- Determine eligibility for senior benefits
- Confirm age for passport and visa applications
- Verify age for insurance and financial services
Relationships & Family
- Calculate age difference between partners
- Compare ages of family members
- Track children's ages and milestones
- Remember ages of relatives for cards and gifts
- Create family age timelines
Discover Your Zodiac Sign
Your birth date determines both your Western zodiac sign and Chinese zodiac animal. These ancient systems have been used for thousands of years to understand personality traits and life patterns.
Western Zodiac Signs (Astrology)
| Zodiac Sign | Date Range | Element | Symbol |
|---|---|---|---|
| Aries | March 21 - April 19 | Fire | ♈ Ram |
| Taurus | April 20 - May 20 | Earth | ♉ Bull |
| Gemini | May 21 - June 20 | Air | ♊ Twins |
| Cancer | June 21 - July 22 | Water | ♋ Crab |
| Leo | July 23 - August 22 | Fire | ♌ Lion |
| Virgo | August 23 - September 22 | Earth | ♍ Maiden |
| Libra | September 23 - October 22 | Air | ♎ Scales |
| Scorpio | October 23 - November 21 | Water | ♏ Scorpion |
| Sagittarius | November 22 - December 21 | Fire | ♐ Archer |
| Capricorn | December 22 - January 19 | Earth | ♑ Goat |
| Aquarius | January 20 - February 18 | Air | ♒ Water Bearer |
| Pisces | February 19 - March 20 | Water | ♓ Fish |
Chinese Zodiac Animals
The Chinese zodiac follows a 12-year cycle, with each year represented by an animal. Your Chinese zodiac sign is determined by your birth year:
- Rat: 1924, 1936, 1948, 1960, 1972, 1984, 1996, 2008, 2020
- Ox: 1925, 1937, 1949, 1961, 1973, 1985, 1997, 2009, 2021
- Tiger: 1926, 1938, 1950, 1962, 1974, 1986, 1998, 2010, 2022
- Rabbit: 1927, 1939, 1951, 1963, 1975, 1987, 1999, 2011, 2023
- Dragon: 1928, 1940, 1952, 1964, 1976, 1988, 2000, 2012, 2024
- Snake: 1929, 1941, 1953, 1965, 1977, 1989, 2001, 2013, 2025
- Horse: 1930, 1942, 1954, 1966, 1978, 1990, 2002, 2014, 2026
- Goat: 1931, 1943, 1955, 1967, 1979, 1991, 2003, 2015, 2027
- Monkey: 1932, 1944, 1956, 1968, 1980, 1992, 2004, 2016, 2028
- Rooster: 1933, 1945, 1957, 1969, 1981, 1993, 2005, 2017, 2029
- Dog: 1934, 1946, 1958, 1970, 1982, 1994, 2006, 2018, 2030
- Pig: 1935, 1947, 1959, 1971, 1983, 1995, 2007, 2019, 2031
Double-Check Your Birth Date
Ensure you enter the correct day, month, and year. A single digit error can make decades of difference in your calculated age. If you're unsure, check your birth certificate or official documents.
Use Age on Specific Date for Planning
Planning retirement? Calculate your age on your planned retirement date. Organizing a milestone birthday? See your exact age on that future date to plan accordingly.
Save Important Calculations
Screenshot or write down important age calculations, especially for official purposes like retirement planning, college applications, or legal requirements where exact age matters.
Consider Time Zones for Exact Age
If you need extremely precise age calculation (down to hours), remember that time zones affect exact birth time. Your birth certificate should show the local time when you were born.
Use Months for Young Children
For babies and toddlers under 2 years old, age in months is more meaningful than years. Pediatricians and child development experts use months to track early milestones.
Check Leap Year Birthdays
If you were born on February 29 (leap day), you only have a "real" birthday every 4 years. Most leap year babies celebrate on February 28 or March 1 in non-leap years.
Important Life Milestones by Age
Different ages mark important milestones, legal rights, and cultural celebrations. Here are significant ages in many countries:
Childhood & Teen Milestones
- 1 year: First birthday, walking and talking milestones
- 5-6 years: Starting kindergarten or primary school
- 10 years: Entering double digits, moving to tween years
- 13 years: Officially a teenager, bar/bat mitzvah in Jewish tradition
- 16 years: Sweet 16, driving age in many countries, work permit eligibility
- 18 years: Legal adulthood in most countries, voting rights, full legal responsibility
Adult Milestones
- 21 years: Legal drinking age in USA, entering true adulthood milestone
- 25 years: Quarter century, car insurance rates often decrease
- 30 years: The big 3-0, leaving twenties behind
- 40 years: Over the hill celebrations, midlife milestone
- 50 years: Half century, golden birthday, AARP eligibility in USA
- 60 years: Diamond jubilee, senior discounts begin in many places
Senior Milestones
- 65 years: Traditional retirement age, Medicare eligibility in USA
- 70 years: Three score and ten, platinum jubilee
- 75 years: Diamond wedding anniversary age range
- 80 years: Octogenarian milestone
- 90 years: Nonagenarian achievement
- 100 years: Centenarian—often receives recognition from government
Understanding Age Differences
Age differences matter in various relationships and situations. Our age difference calculator shows the exact gap between two people in years, months, and days.
Common Age Gap Scenarios
Couples: Many couples wonder about their age difference. While age is just a number in adult relationships, knowing the exact gap can be interesting. Our calculator shows not just years but months and days too.
Siblings: Parents often track the age gap between children. Common gaps include Irish twins (less than 12 months), close spacing (1-2 years), average spacing (2-4 years), or larger gaps (5+ years).
Generations: Typical generational gaps are about 20-30 years between parents and children, 40-60 years between grandparents and grandchildren.
Famous Age Gaps
- Small gaps (1-5 years) are most common in friendships and partnerships
- Medium gaps (10-20 years) are common between colleagues or mentor relationships
- Large gaps (30+ years) typically represent generational differences
- Sibling gaps vary widely—some families have children 15-20 years apart
Special Case: Leap Year Birthdays (February 29)
Being born on February 29 makes you a "leapling" or "leaper"—someone with a birthday that only comes around every 4 years. About 5 million people worldwide share this rare birth date.
How Leap Year Birthdays Work
Leap years occur every 4 years to keep our calendar aligned with Earth's orbit around the sun. This means:
- If you're born on Feb 29, you have a "real" birthday only in leap years
- In non-leap years, you celebrate on Feb 28 or March 1
- Legally, you age like everyone else—you don't stay young forever!
- By age 20, you've only had 5 actual February 29 birthdays
- Recent leap years: 2020, 2024; Next leap years: 2028, 2032
Fun Leap Day Facts
- Odds of being born on Feb 29: about 1 in 1,461
- Ireland has a tradition where women can propose to men on leap day
- Some cultures consider leap day lucky, others unlucky
- The town of Anthony, Texas calls itself the "Leap Year Capital of the World"
Fascinating Age Facts
Here are some interesting facts about age and aging that you might not know:
Age-Related Records
- Oldest verified person: Jeanne Calment of France lived 122 years and 164 days (1875-1997)
- Life expectancy: Global average is around 73 years, but varies by country (80+ in Japan, Monaco)
- Centenarians: Over 500,000 people worldwide are 100+ years old
- Birthday probability: In a group of 23 people, there's a 50% chance two share a birthday
Age in Different Cultures
- Korean age: Koreans are considered 1 year old at birth and gain a year every New Year's Day
- Coming of age: Varies globally—13 (bar/bat mitzvah), 15 (quinceañera), 18-21 (legal adulthood)
- Respect for elders: Many Asian cultures show special respect to age 60, 70, 80 milestones
- Lucky ages: In Chinese culture, ages 18, 28, 38, etc. are considered lucky (8 is lucky number)
Your Body Through the Ages
- Your heart beats about 100,000 times per day—over 3 billion times by age 80
- You blink about 15-20 times per minute—over 250 million times by age 30
- You breathe about 20,000 times per day—over 600 million breaths by age 80
- Your brain reaches full maturity around age 25