Sales tax calculator
Add tax to a price or reverse a tax-inclusive total.
Runs in this tab. The file stays here.
This runs in your browser. Nothing is uploaded.
About Sales tax calculator
Add sales tax to a price or reverse a tax-inclusive total in the browser.
Forward mode multiplies price by the rate. Reverse divides a tax-inclusive total by (1 + rate). Rounding is to cents.
No jurisdiction database — you type the rate that applies where you are.
How to use Sales tax calculator
- 1Choose add tax or reverse.
- 2Enter amount and rate.
- 3Read tax and totals.
Common questions
Is this GST/VAT specific?
No. Same arithmetic for any percentage rate you enter.
Related tools
Why this one doesn't upload your file
There is no server to upload to. This page is a static file, and the work happens in your browser using the same graphics and WebAssembly code that renders every other site you visit. Your file is read from disk into memory, processed, and handed back as a download. Once the page has loaded you can disconnect from the network entirely and it keeps working. The longer explanation