Tool4SaaS

Date Calculator

Add or subtract days from any date. Calculate the exact number of days between two specific dates for easy planning.

Resulting date
Enter a start date and number of days

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About the author

Written and maintained by the Tool4SaaS team. Every tool runs locally in your browser and is tested in-house for accuracy. Last updated: .

Frequently asked questions

Yes. Enter a start date and a number of days, with a plus or minus sign.

Yes. Pick two dates to get the number of days between them.

Yes, it is free, works offline in your browser, and your data never leaves your device.

How to use Date Calculator

  1. Choose mode: Choose add/subtract or difference.
  2. Enter dates: Enter the date or dates you need.
  3. Read result: See the resulting date or day count.