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Date Calculator

Calculate the number of days between two dates (including business days and weeks), or add and subtract days from any date. Supports business-days-only mode.

Your data never leaves your device
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Frequently Asked Questions

  • How are business days calculated?

    Business days are weekdays (Monday–Friday). Saturdays and Sundays are excluded. Public holidays are not currently accounted for.

  • Can I subtract days from a date?

    Yes. In Add / Subtract mode, enter a negative number to subtract days. For example, -7 goes back one week from the selected date.