Your age
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About the Age Calculator
Age appears on every form, application, and eligibility rule you will ever encounter — yet calculating it precisely is surprisingly fiddly. Months have different lengths, leap years insert an extra day, and the "correct" age depends on a counting convention. This calculator applies the standard convention: complete years first, then leftover months, then leftover days, borrowing the actual length of the previous month when needed.
Beyond the headline age, the tool totals your time in months, weeks, days, and hours — numbers that surprise people. It also counts down to your next birthday and lets you compute age at any historical or future date, which is exactly what exam boards and visa officers do when they apply a cutoff date.
Everything runs locally in your browser. Your date of birth is sensitive personal data; it never leaves your device.
How to use the Age Calculator
- 1 Enter the date of birth in the first field.
- 2 Leave the second field as today, or set any target date to compute age at that date (useful for cutoff-based eligibility).
- 3 Read the exact age in years, months, and days, plus totals in months, weeks, days, and hours.
- 4 Check the next-birthday card for the countdown and the age being turned.
Key features
Calendar-exact arithmetic
Borrows real month lengths, so results match civil counting rather than approximations.
Age at any date
Compute eligibility ages against exam cutoffs, visa dates, or historical events.
Next birthday countdown
Shows the exact date, weekday context, and days remaining until the next birthday.
Total-lived statistics
Months, weeks, days, and hours lived — fun, occasionally shocking, numbers.
Who uses the Age Calculator?
- Competitive exam and school admission forms with precise age-as-on-date cutoffs.
- Passport, visa, and driving-licence applications that state minimum or maximum ages.
- Parents tracking child milestones in months for vaccinations and paediatric visits.
- HR onboarding and retirement-date computations.
- Genealogy research, placing ancestors’ ages at historical events.
- Anyone curious exactly how many days they have been alive.
Tips and best practices
- For eligibility checks, always compute age as on the official cutoff date, not today — a one-day difference has disqualified applicants.
- Age counting conventions differ by country (Korea’s traditional system adds a year at birth). This tool uses the international convention used on Indian and most Western documents.
- When a form asks for age in "completed years", use the years figure only — it is your age on your most recent birthday.
- Feb-29 birthdays are observed on March 1 in non-leap years here, matching common legal practice.
- For insurance and pension planning, remember ages are often taken as "age nearer birthday" — check the insurer’s definition.
Frequently asked questions
By counting complete calendar years between the date of birth and the target date, then leftover full months, then leftover days — borrowing days from the previous month where needed. This matches how ages are conventionally stated on documents.
Months vary from 28 to 31 days. This calculator borrows the actual number of days in the previous calendar month, which can differ from assuming every month has 30.
For people born on February 29, the birthday is observed on March 1 in non-leap years, and the next-birthday countdown follows that convention.
No. All computation runs locally in your browser; the date never leaves your device.
Yes — set the second field to any date, past or future. The tool computes the age as on that date instantly.