Smart Web Apps Days From Calculator
Category

Days From Calculator

Count the number of days between two dates. Choose calendar days, weekdays (Mon–Fri), or workdays (Mon–Fri minus US federal holidays).

Choose a start and end date, select a mode, then click Calculate.
Formula baseline: days = end − start (exclusive). Inclusive adds 1.
Results
Count
—
Mode
—
Formula
US federal holidays excluded
Observed dates within the selected range:

    Tool description

    This tool counts days between two dates with three modes: calendar days, weekdays (Mon–Fri), and workdays (Mon–Fri minus observed US federal holidays). Use it for deadline planning, staffing forecasts, shipping SLAs, and project timelines.

    How to use

    1. Select start and end dates.
    2. Choose a mode (all days, weekdays, or workdays).
    3. Optionally enable inclusive count.
    4. Click Calculate to view counts and formula.

    Why it’s useful

    • Compare calendar vs workday timelines.
    • Estimate lead times without manual counting.
    • Reduce planning mistakes around weekends/holidays.

    Use cases & interpretation

    • Project planning: use workdays for tasks that only progress on business days.
    • Shipping: compare weekdays to carrier “business day” language.
    • Staffing: model how many on-call days are weekend vs weekday.

    FAQs

    Weekdays count Monday–Friday. Workdays count Monday–Friday, excluding observed US federal holidays.

    No. Many businesses observe additional holidays or different rules. Use this as a standard baseline.
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