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Calculate your exact age in years, months, and days. Find your next birthday, zodiac sign, generation, and how old you'd be on other planets.
Enter your date of birth above to see your exact age breakdown.
How does it work?
The calculator computes the exact difference between your date of birth and the target date, accounting for varying month lengths and leap years. The result shows complete years, remaining months, and remaining days.
Leap years
Leap years add an extra day (29 February) every 4 years, except for years divisible by 100 unless also divisible by 400. The total days calculation accounts for this automatically.
Zodiac signs
The Western zodiac divides the year into 12 signs based on the position of the Sun at the time of birth. Each sign spans roughly 30 days.
This calculator determines your exact age by computing the difference between your date of birth and today (or any date you choose). It handles varying month lengths and leap years correctly, so the years, months, and days shown are always precise. The total days figure uses the actual elapsed time between the two dates, not an approximation.
Use the age calculator to find out exactly how old you are for official forms, check eligibility for age-based services, count down to your next birthday, or discover fun facts like your zodiac sign, Chinese zodiac animal, what generation you belong to, and how old you'd be on Mars or Jupiter. It's also handy for working out the age difference between two people by comparing results.