Free Date Calculator - Add or Subtract Dates

Add or subtract days, weeks, months, or years from any starting date. Instantly see the resulting date and day of the week. Use quick presets for common calculations.

About this tool

The date calculator performs date arithmetic by adding or subtracting a specified amount of time from your chosen starting date.

Add or subtract days, weeks, months, years
Quick preset buttons for common calculations
Shows resulting day of the week
ISO date format output
Works on mobile and desktop

100% free. No signup required. No data collected or sent anywhere.

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