â Add / Subtract Days
Add or subtract days from a date to get a new date.
How to use the Add / Subtract Days
- Enter Start date, Days (â for past).
- The result updates instantly as you type.
- Copy or note down your result.
How it works
Your values are converted using standard ratios and the result updates instantly in your browser.
Example
Using the default values (Start date: 2026-10-05, Days (â for past): 30):
ResultWed Nov 04 2026
FAQ
Is the Add / Subtract Days free to use?
Yes. It is free, needs no signup and has no usage limits.
Is my data safe?
Yes. Everything is calculated in your browser, so what you type or upload is never sent to a server.
Can I use it on my phone?
Yes. KsWebProduction is built mobile-first and works in any modern browser.