Date Difference
Calculate days, weeks, months, and years between two dates. Includes business day mode and date addition/subtraction.
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Select a date
Select a date
Select a date
Select dates or enter a date to add/subtract from, then click Calculate.
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About This Tool
Calculate the exact number of days between any two dates, or add/subtract days from a base date. Use business day mode to count only Monday–Friday. Results include breakdown in days, weeks, months, and years. All date math is done locally in your browser.