Age Calculator
Enter your birth date and see your exact age in years, months, and days. See when your next birthday falls, your life progress percentage (based on a 100-year reference), and key age milestones; all with no account required.
Smart Tips
• Enter your birth date and optionally a calculation date to get precise age
• Use the life progress feature to see what percentage of average life expectancy you've completed
• Calculate your age on future dates to plan milestones, celebrations, and important life events
• Our calculator accounts for leap years and varying month lengths for precise calculations
Formulas
| Type | Formula |
|---|---|
| Exact Age | Age = Current Date - Birth Date |
| Days Lived | Days = (Current Date - Birth Date) in days |
| Life Progress | Progress = (Current Age ÷ Life Expectancy) × 100% |
Key Insights
Leap Years & Month Lengths
Calculations use the Gregorian calendar: 28–31 days per month and leap years every 4 years (except century years). Feb 29 births age correctly on non-leap years.
Life Progress
Life Progress uses a 100-year baseline. At 25 you’re 25%; at 50, halfway. Handy for retirement planning or reflecting on long-term goals.
Future Dates
Enter any future "As Of" date to see your age then. Check retirement age (65, 67), driving eligibility, or a child’s 18th birthday.
Next Birthday Countdown
Shows days until your next birthday. Plan parties, trip dates, or age-based eligibility (e.g. insurance, benefits).
Frequently Asked Questions
Note:Age calculations are based on standard date arithmetic and calendar systems. Results account for leap years. For precise legal or medical purposes, verify with official documentation.