Reverse Sales Tax Calculator — free online
You have a receipt with one final number on it, and tax is already baked in. Now you need the price before tax — maybe for an expense report, a refund, or just to check the math. Doing that by hand is fiddly and easy to get wrong. We added a free tool that does it for you — Reverse Sales Tax Calculator — right in your browser.
What it does
You type in the total that already includes tax and the tax rate, and it works backwards to give you the original pre-tax price and the exact tax amount. No formulas to remember, no guessing — just the numbers you actually need.
Nothing leaves your device
The whole thing runs inside your browser. The numbers you type stay on your screen. Nothing is uploaded to a server, and nothing is saved anywhere. When you close the tab, it's gone.
How to use it
- Open Reverse Sales Tax Calculator and enter the tax-included total.
- Enter the tax rate that applies.
- Read off the pre-tax price and the tax amount.
It's free with no limit. There are more small tools on the Apps page.