Age Calculator
Calculate your exact age in years, months, days, hours, minutes, and seconds
Calculate Your Age
Enter your birth date and the date to calculate your age on
Common Use Cases
Current Age
Calculate how old you are today
Future Age
Find out how old you'll be in 2030, 2050, etc.
Age on Specific Date
Calculate age on birthdays, anniversaries, or important dates
Precise Calculations
Include birth time for exact age in hours, minutes, seconds
Age Conversion Reference
Quick Tips
Enable time calculation for precise age down to the second
Change the "Calculate On" date to find your age on any future or past date
Perfect for planning birthday celebrations and milestones
The calculator accounts for leap years and varying month lengths
Understanding Age Calculation
How Age is Calculated
Age calculation involves computing the time elapsed between your birth date and a target date. Our calculator uses precise date arithmetic to account for leap years, varying month lengths, and exact time differences.
Calculation Method
- Start with your birth date
- Add complete years until reaching the last birthday before the target date
- Add complete months from that point
- Add remaining days
- For time-based calculations, include hours, minutes, and seconds
Leap Year Considerations
The calculator automatically accounts for leap years (years divisible by 4, except century years not divisible by 400). This ensures accurate calculations even across leap year boundaries.
Example Calculation
Born: March 15, 1990
Calculate on: August 10, 2025
Step 1: From March 15, 1990 to March 15, 2025 = 35 years
Step 2: From March 15, 2025 to August 15, 2025 = 5 months
Step 3: August 15 to August 10 = -5 days (so 4 months, 26 days)
Result: 35 years, 4 months, 26 days
Alternative Units
Total Days: ~12,932 days
Total Hours: ~310,368 hours
Total Minutes: ~18,622,080 minutes
Total Seconds: ~1,117,324,800 seconds
Note: Month and year averages are used for total calculations (30.4375 days/month, 365.25 days/year) to account for varying month lengths and leap years.