Age calculator
How do I use this page?
- Fill in the fields in the form above — the result recomputes at once, with no page reload.
- Under the result you will find the interpretation scale, if the calculator has one: it says which range your value fell into.
- The formula we use is shown lower on this page — you can check the arithmetic yourself.
- To compute the same for another game or variant, change it in the select field — prices and pools update automatically.
Further reading
Theory — how is exact age calculated?
Calculating age looks trivial, but simply subtracting birth year from the current year can be off by a year, since it ignores whether the birthday has already passed. A correct algorithm compares year, month and day in sequence against today's date, producing full years, months and days. The calculator also shows the total number of days lived and the date of the next birthday.
Frequently asked questions
How exactly is age calculated?
The year, month and day of the birth date are compared, in that order, with the current date. If this year's birthday hasn't occurred yet, one is subtracted from the difference in years. Someone born on 20 December 1990 turns, on 1 June 2025, 34 years, 5 months and 12 days old.
Which years are leap years?
Every year divisible by 4 is a leap year, except years divisible by 100, unless they are also divisible by 400. 2024 was a leap year, 1900 was not, and 2000 was. A leap year has 366 days instead of 365.
How many days are there in 30 years?
About 10,957 days, but the exact number depends on how many leap years fall within that period. Thirty years usually spans 7 or 8 leap years, giving between 10,957 and 10,958 days. The calculator computes this figure to the exact day.
When do people born on 29 February celebrate their birthday?
On 29 February in leap years, and conventionally on 28 February or 1 March in other years — the law doesn't dictate a single answer. Under Polish civil law, a term counted in years ends on the day corresponding to the starting day, and if there is no such day, on the last day of the month.
See also
Business days calculator
Count business days with automatic Polish public holidays or your own exclusions. Choose dates and review excl
Date Calculator — add or subtract days, weeks, months and years
Add days, weeks, months and years to a date or subtract them. The calculator respects leap years and month len
Days Between Dates Calculator
Count the days, weeks, months and years between two dates. Exclusive and inclusive variants, correct leap-year