Weeks Between Dates: Your Questions Answered
These are the questions people ask most often about weeks between dates. Each answer is short; follow the links for the full detail.
What does a weeks between dates calculation tell me?
Counts weeks between two dates.
What is the formula?
Weeks = days ÷ 7.
What do I need to enter?
Start date, End 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:
- Start date: 5 Jan 2026
- End date: 5 Oct 2026
the calculator returns:
- Weeks: 39.00 weeks
- Full weeks: 39 weeks
Any tips?
- Notice periods in employment contracts may be counted in calendar days or working days, so read the wording carefully.
- Public holidays are not weekends; subtract them separately when counting working days.
- For overnight shifts, add 24 hours when the end time is earlier than the start time.
Background
Age is calculated in completed years, months and days. Someone born on 29 February is usually treated as turning a year older on 28 February or 1 March in non-leap years, depending on the rule being applied.
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.
The Gregorian calendar has months of 28 to 31 days and adds a leap day almost every four years, which makes counting days by hand surprisingly error-prone. Converting dates to day numbers and subtracting avoids the problem.
Related calculations
- Working Days Calculator: Counts weekdays between two dates, inclusive.
- Day of the Week Calculator: Tells you which weekday any date falls on.
- Months Between Dates Calculator: Counts complete calendar months between two dates.
- Time Duration Calculator: Calculates hours and minutes between two times, including overnight shifts.
Try it yourself with the Weeks Between Dates Calculator.
Run your own numbers: Weeks Between Dates Calculator