Kalkuly
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Days between dates
Count how many days separate two dates, with the equivalent in weeks and months and the number of business days (Monday to Friday).
How to use it
Pick a start date and an end date. Tick the box to include the end date in the count. Public holidays are not deducted from business days.
Formula and method
Days = end date − start date (+1 if the end date is included). Weeks = days ÷ 7. Months ≈ days ÷ 30.44. Business days = days excluding Saturdays and Sundays.
Worked example
From 1 January to 31 March 2026 there are 89 days (90 including 31 March), that is about 12.7 weeks, including 64 business days.
Frequently asked questions
How many days are there in a year?
365 days, or 366 in a leap year (years divisible by 4, except century years not divisible by 400).
Are public holidays excluded?
No, business days only exclude Saturdays and Sundays because holidays differ from country to country.