Age Calculator
Calculate your exact age, find age on any date, count days until your next birthday, compare two ages, and more — all with precise calendar math.
Enter your date of birth to calculate your exact current age.
Calculate your age on any past or future date.
Find out how many days until your next birthday and what age you'll turn.
See the total time you've lived in years, months, weeks, days, hours, and more.
Compare two dates or birth dates to find the exact difference.
Reverse-calculate: enter an age and a reference date to estimate the date of birth.
Age Timeline
Enter a date of birth above to see your life timeline.
Your birthday countdown will appear here.
How Age Calculation Works
Calendar-Based Math
This calculator uses real calendar dates — not a simplified 365-day year. Each month's actual length (28–31 days) is used for precise results.
Leap Year Handling
Leap years (every 4 years, with century exceptions) are fully accounted for. If you were born on February 29, your birthday in non-leap years is treated as March 1.
Date vs. Date+Time
When only a date is provided, calculations are based on full days. If you also enter a birth time, hours/minutes/seconds become more precise — but are still approximate due to timezone differences.
Common Use Cases
Check if a child meets the age cutoff for school enrollment on a specific date.
Determine exact age for voting eligibility, driving licenses, or legal contracts.
Many forms require your exact age in years and months — get it right instantly.
Find out exactly how many days until your next birthday or a friend's birthday.
Calculate the exact age gap between siblings, partners, or colleagues.
Find out how old you'll be on a future milestone — retirement, anniversary, or event.
Frequently Asked Questions
How is exact age calculated?
Age is calculated by counting complete years, months, and days from your date of birth to the reference date. Each month's real length is used, and leap years are fully considered.
Does this calculator account for leap years?
Yes. February 29 birthdays are handled correctly. In non-leap years, the next birthday is treated as March 1.
Can I calculate my age on a future date?
Yes — use the 'Age on Date' mode and enter any future date. The calculator will show your exact age on that day.
How many days until my next birthday?
Use the 'Next Birthday' mode. Enter your date of birth and the calculator instantly shows the remaining days and what age you will turn.
Can I compare the ages of two people?
Yes — the 'Age Difference' mode lets you enter two dates of birth and shows the exact gap in years, months, and days.
Can I find my date of birth from my age?
Yes — the 'Find DOB' mode lets you enter your age (years, months, days) and a reference date to reverse-calculate your estimated date of birth.