Age Calculator
Calculate your exact age in years, months, days, hours, minutes, and seconds. Discover your zodiac sign, Chinese zodiac, birthstone, and more.
Leave empty for current date/time
How Age Calculation Works
Calculating exact age involves more than simple subtraction due to varying month lengths and leap years. Our calculator handles these complexities automatically.
Calculation Method
- Years are calculated from year to year
- Months account for the varying days in each month
- Days are adjusted when the current day is less than birth day
- Leap years are automatically factored in
Related Tools
- Date Difference Calculator - Days between two dates
- Reading Time Calculator - Estimate reading duration
- Percentage Calculator - Calculate percentages
Why Calculate Your Exact Age?
Official Documents
Many forms require exact age in years, months, and days for legal, medical, or insurance purposes.
Birthday Countdowns
Know exactly how many days until your next birthday for planning celebrations.
Child Development
Pediatricians track development using exact age in months and weeks, especially for infants.
Sports Categories
Athletic competitions often have strict age cutoffs requiring exact age calculations.
School Enrollment
School admission often depends on being a certain age by a specific cutoff date.
Fun Facts
Discover interesting facts like how many seconds you've been alive or your 10,000th day.
Frequently Asked Questions
How is age calculated exactly?▼
Age is calculated by counting complete years, months, and days from your birth date. A year is complete on the same date each year, a month when the same day passes, and days are the remainder. The calculator accounts for varying month lengths and leap years.
Does this calculator account for leap years?▼
Yes! The calculator automatically handles leap years in all calculations. If you were born on February 29, the calculator correctly computes your age and identifies when your birthday falls in non-leap years.
What is the 10,000 day milestone?▼
10,000 days is approximately 27 years and 4 months. Many people celebrate this milestone as a unique life event. Similarly, 1 billion seconds occurs at around 31 years and 8 months.
How accurate is the zodiac sign calculation?▼
The zodiac signs are based on traditional Western astrology date ranges. The exact boundaries can vary by a day depending on the year, but our calculator uses the most commonly accepted ranges.
Can I calculate age for a future date?▼
Yes! Use the "Calculate Age On" field to see how old you'll be on any future date. This is useful for planning events or checking eligibility requirements.
Why does the seconds counter update live?▼
When calculating age to "today," the seconds counter updates in real-time to show your exact age at this moment. This feature is disabled when calculating age to a specific past or future date.