Count calendar days, business days, and weekends between any two dates with custom end-date inclusion.
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A days calculator counts the exact number of days between two dates on the Gregorian calendar. It decomposes the total duration into working days (Monday–Friday) and weekend days (Saturday–Sunday), essential for court deadlines, leasing agreements, and project sprints.
D_{\text{total}} = \left\lfloor \frac{\text{Date}_2 - \text{Date}_1}{86,400,000} \right\rfloor + (\text{if inclusive: } 1)Calendar day count derived from 86,400,000 milliseconds per standard calendar day.
Scenario: Counting days from September 1 to November 30.
September has 30 days, October has 31 days, November has 30 days.
From Sept 1 to Nov 30 is 90 calendar days.
Includes 65 business days and 25 weekend days.
By standard convention, the start day is included and end day is excluded (delta duration). You can check "Include End Date" to count both days.
A standard year has 365 days, while a leap year has 366 days due to the addition of February 29.
Business days are standard working days from Monday through Friday, excluding Saturdays and Sundays.
90 days equals 12 full weeks and 6 days (or approximately 12.86 weeks).
Add or subtract days, weeks, months, and years from any date or calculate the exact duration between two dates.
Convert weeks to days, hours, minutes, and approximate months for pregnancy milestones, school semesters, and projects.
Project future dates by adding months or calculate total elapsed months between two calendar dates.
Breakdown: 2 months, 30 days
65
Mon - Fri26
Sat - Sun