How to use the Sales Tax Calculator
- Choose whether you know the price before tax or the total.
- Enter the amount and your combined tax rate.
- Read the tax and the other price.
How U.S. sales tax works
Sales tax is added at the register as a percentage of the price. The rate is the state rate plus any county and city rates, so it differs by ZIP code — from 0% in a few states to more than 10% in some cities. Tax = price × rate; price before tax = total ÷ (1 + rate).
Outside the U.S., prices usually include VAT; use the VAT Calculator.
Also searched as: tax calculator, price before tax, reverse sales tax calculator, how much is tax, sales tax rate.
Tools that pair well with the Sales Tax Calculator
- Tip Calculator — Enter the bill, tap a tip percentage and see the tip, the total and what each person pays — with an option to round up so nobody deals with cents.
- Discount Calculator — Find the sale price and how much you save for any percent or amount off.
- Percentage Calculator — Seven everyday percentage calculations on one page.
- Unit Price Calculator — Compare package sizes by price per unit — per 100 g, ounce, liter or item — and see which one is the better deal and by how much.
Frequently asked questions
How do I find the price before tax?
Divide the total by 1 plus the tax rate. At 8.25%, $54.11 ÷ 1.0825 = $49.99.
Which states have no sales tax?
Alaska (statewide, though some cities charge it), Delaware, Montana, New Hampshire and Oregon.
Is anything I enter saved or sent?
No. The calculation runs in your browser. Your last inputs are remembered on this device only, so the page opens where you left off.
Can I install Sales Tax Calculator as a web app and use it offline?
Yes. Sales Tax Calculator is an installable web app (PWA) — installed from your browser, not downloaded from an app store. Click Install app at the top of this page in Chrome or Edge (Windows, macOS, Linux, ChromeOS) or on Android, use Share → Add to Home Screen on iPhone and iPad, or File → Add to Dock in Safari 17+ on a Mac. It then opens in its own window with its own icon, and because it runs entirely in your browser it keeps working offline. Firefox on desktop can’t install web apps. How installing works.