Calculate the exact duration between two dates - in days, weeks, months, years, hours, and business days. Also add or subtract days from any date.
Free online date duration calculator with two modes. In Date Difference mode, enter any two dates to see the exact gap in days, weeks, months, years, hours, minutes, and business days (excluding weekends). In Add/Subtract Days mode, start from any date and add or subtract a specific number of days to find the target date. Includes quick presets for common durations (+30, +90, +365 days). Handles leap years correctly. Perfect for project planning, calculating deadlines, finding ages, counting down to events, or figuring out business days between dates. 100% browser-based, no signup required.
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