Count dates using calendar days rather than local-clock elapsed hours. The start date is included in work-day enumeration and the end is excluded unless the inclusive option is checked.
Check the stated input format, calculation convention and limits before using the result.
Check the example inputs, then calculate. Your values stay in this browser.
End must be on or after start; an equal pair yields zero unless the end is included.
Work Days Calculator validates start date, end date, include the end date, excluded holidays (yyyy-mm-dd, comma separated) before applying the displayed equation. End must be on or after start; an equal pair yields zero unless the end is included.
Work Days Calculator: work days = count(Monday–Friday dates not in the supplied holiday set). Input definitions: start = Start date; end = End date; inclusive = Include the end date; holidays = Excluded holidays (YYYY-MM-DD, comma separated). Use the selected convention throughout the calculation.
Work Days Calculator baseline input: Start date: 2026-01-01; End date: 2026-01-31; Include the end date: not selected; Excluded holidays (YYYY-MM-DD, comma separated): . Output: Work days (Monday–Friday) = 22 days. Substitute these values into the displayed equation to reproduce the result.
Content and calculation reviewed:
Understand the calculation
Count eligible dates, not total days minus a rough weekend estimate. January 5–12, 2026 with the end excluded contains five Monday–Friday dates. Excluding January 5 as a supplied holiday leaves four. Duplicate holiday entries are removed and weekend holidays do not subtract an extra weekday. Local holidays or substitute days must be entered explicitly.
work days = count(Monday–Friday dates not in the supplied holiday set)
The detailed guide adds variable definitions, a reproducible example, a practice question and model limitations.
From question to result