How to use the VAT Calculator
- Choose whether your amount includes VAT.
- Enter the amount and pick a rate (or a custom one).
- Copy the net, VAT and gross figures.
The formulas
Add VAT: gross = net × (1 + rate). Remove VAT: net = gross ÷ (1 + rate) — not gross minus the rate, a common mistake. At 20%, VAT on a £120 gross price is £20, not £24.
Selling in the U.S.? Use the Sales Tax Calculator. Need margins too? Try the Profit Margin Calculator.
Also searched as: add vat, remove vat, reverse vat calculator, vat inclusive, gst calculator, net to gross.
Tools that pair well with the VAT Calculator
- Markup Calculator — Set a markup percentage on your cost to get the selling price, or enter both to see the markup — with the matching profit margin.
- Percentage Calculator — Seven everyday percentage calculations on one page.
- Discount Calculator — Find the sale price and how much you save for any percent or amount off.
- Roman Numeral Converter — Convert any number from 1 to 3,999,999 into Roman numerals — or read Roman numerals back as numbers — with a breakdown of every symbol.
Frequently asked questions
How do I remove VAT from a price?
Divide the gross price by 1 plus the rate. For 20% VAT, divide by 1.2: £120 ÷ 1.2 = £100 net.
Is GST the same as VAT?
They work the same way: a tax added at each stage of sale. Countries such as India, Australia and New Zealand call it GST.
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 VAT Calculator as a web app and use it offline?
Yes. VAT 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.