Age: Your Questions Answered
These are the questions people ask most often about age. Each answer is short; follow the links for the full detail.
What does a age calculation tell me?
Calculates exact age in years, months and days.
What is the formula?
Count whole years, then months, then days.
What do I need to enter?
Date of birth, Age on this date.
Does this count Singapore public holidays?
No. It counts calendar days or weekdays. Subtract any public holidays in the period yourself.
Can you show an example?
For example, with these inputs:
- Date of birth: 9 Aug 1990
- Age on this date: 5 Oct 2026
the calculator returns:
- Exact age: 36 years, 1 months, 26 days
- Total days: 13,206 days
- Total months: 433 months
Any tips?
- Write dates in an unambiguous format such as 5 Oct 2026 when sharing deadlines.
- Public holidays are not weekends; subtract them separately when counting working days.
- Convert times to minutes before subtracting, then convert back to hours and minutes.
Background
Many Singapore rules are expressed in days: notice periods, leave entitlements, stamp duty deadlines and probation periods. Whether the count includes the start or end date, and whether weekends count, changes the answer.
When sharing dates internationally, write the month as a word to avoid confusion between day-month and month-day formats.
Singapore has 11 gazetted public holidays a year, and when one falls on a Sunday the following Monday is a holiday. Working-day calculations therefore need holidays removed separately from weekends.
Related calculations
- Hours Worked Calculator: Totals a shift's paid hours after breaks.
- Days Between Dates Calculator: Counts days between two dates.
- Add Days to a Date Calculator: Finds the date a number of days after another date.
- Subtract Days from a Date Calculator: Finds the date a number of days before another date.
Try it yourself with the Age Calculator.
Run your own numbers: Age Calculator