Days Between Two Dates
Date Math
Start from a date and add or subtract a number of days to find the resulting date.
About this tool
Calendar days is the simple absolute difference between two dates. Business days excludes Saturdays and Sundays (public holidays are not modelled, adjust manually). The "include end date" option adds one day, which is useful when counting inclusive ranges such as contract or SLA periods. Date math is handy for deadline calculations: finding the date 90 days from contract signing, or how many business days remain before a compliance deadline. All calculations run entirely in your browser.