Days Between Dates Calculator
Count the total calendar days, working weekdays, weekend days, and full weeks between any two calendar dates.
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Frequently Asked Questions
Everything you need to know about calculating time, durations, and work shifts.
How do you calculate the exact number of days between two dates?
Convert both dates to midnight UTC to prevent daylight saving distortions, subtract the start date timestamp from the end date timestamp in milliseconds, and divide by 86,400,000 (the number of milliseconds in a 24-hour day).
Does the calculation include the starting and ending day?
By default in mathematical date calculations, the starting day is included and the ending day is excluded (e.g., from Monday to Tuesday is 1 day). If you toggle on Include end day, both terminal days are counted (e.g., Monday to Tuesday becomes 2 days).
What constitutes a business day in this calculator?
Business days count Mondays, Tuesdays, Wednesdays, Thursdays, and Fridays. Saturdays and Sundays are categorized separately as weekend days.