Enter two dates to see how many weeks are between them.
Thinking in weeks
Some plans are naturally measured in weeks rather than days, including pregnancy, training programs, and project sprints. This calculator divides the day count between two dates by seven to give the number of weeks, including any partial week as a decimal.
A decimal result is normal, since most spans are not an exact multiple of seven days. A figure like 12.4 weeks tells you the span is just past the twelve week mark, which is often precise enough for planning.
When you need whole working weeks instead, pair this with the business days calculator to strip out weekends.
The formula
Worked example
84 days between two dates equals exactly 12 weeks.
How to read your result
Partial weeks show as a decimal. For whole working weeks, pair this with the Business Days Calculator.
Frequently asked questions
- Why a decimal result?
- Because most date gaps are not an exact multiple of seven days.
- Is it inclusive of both dates?
- It measures the gap; add a day for inclusive counting.
- Good for pregnancy or projects?
- Yes - both are commonly tracked in weeks.
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