Weeks Between Dates Calculator
Count the weeks — and the days left over — between two dates.
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Dates use your device’s calendar. Business days are Monday to Friday.
Weeks between two dates
weeks = days between the dates ÷ 7
Example: 1 March to 30 May is 90 days, which is 12 weeks and 6 days, or 12.86 weeks as a decimal.
When weeks matter
Pregnancy, training plans, notice periods and school terms are often counted in weeks. Tick “Include the end date” if the last day counts too — it adds one day.
Frequently asked questions
How many weeks are in a year?
52 weeks and 1 day (52 weeks and 2 days in a leap year).
How do I convert days to weeks?
Divide by 7. The whole number is the weeks; the remainder is the days left over.
How many weeks are in a month?
About 4.35 weeks on average (30.44 days ÷ 7).