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VAT, GST & Sales Tax Calculator

Add tax to a price — or strip it out of a total — in one click. Works for any VAT, GST or sales tax rate, anywhere in the world. Free forever.

Tax Calculator

Results update live as you type. Nothing leaves your browser.

Your Numbers
“Add tax” starts from a net price. “Remove tax” works backwards from a total that already includes tax — handy for receipts and competitor prices.
Your result
0.00
total including tax
Net amount (before tax)0.00
Tax amount0.00
Gross amount (with tax)0.00
Add this to a free invoice →

How to calculate tax in 3 steps

  1. Enter your amount. Type the price you are working with — either before tax or tax-inclusive, depending on what you have.
  2. Pick the rate and direction. Choose a preset (VAT 20%, GST 18%…) or type any rate, then select “Add tax” or “Remove tax”.
  3. Read the split instantly. You get the net amount, the exact tax, and the gross total — ready to quote, invoice, or check a receipt against.

Why getting the tax split right matters

Quote a client a tax-inclusive price without realising it, and the tax comes out of your pocket. Add tax on top of a price your client assumed was final, and the invoice turns into an argument. This calculator removes the guesswork both ways: it adds VAT, GST or sales tax to a net price, and works backwards from a gross total to show how much of it is really tax. When the numbers are right, drop them straight into the free invoice generator — flat tax, per-line tax and GST modes are built in. Not sure what to charge before tax? Work out your rate with the hourly rate calculator first.

Looking for a specific state rate? Try the Brazil ICMS calculators — one per state, each with that state's standard internal rate pre-filled.

Tax calculator FAQ

Multiply the net price by the VAT rate and add it on: a 1,000 item at 20% VAT is 1,000 + 200 = 1,200. In the calculator, choose “Add tax”, enter the amount and rate, and the tax and total appear instantly.
Divide the gross total by (1 + rate ÷ 100). At 20% VAT, a 1,200 total divides by 1.2 to give a 1,000 net — the VAT inside it is 200. Choose “Remove tax” in the calculator and it does this for you.
VAT and GST are the same idea under different names: a tax on value added, charged at each stage of the supply chain with input credits. Sales tax is charged once, at the final retail sale. The maths for adding or removing them from a price is identical, which is why one calculator covers all three.
The UK charges 20% standard VAT with a 5% reduced rate. Most EU countries sit between 17% and 27% standard. The presets above cover the most common ones, and you can type any rate.
India uses 5%, 12%, 18% and 28% GST slabs. Canada charges 5% federal GST, Australia 10%, New Zealand 15%, and Singapore 9%. Pick a preset or enter your exact rate.
Yes — unlimited calculations, no signup, no watermark. Everything runs in your browser; nothing you type is uploaded anywhere.
Yes. The presets are shortcuts — type any rate into the tax rate field, including decimals like 8.25%, and the results update live.
Use the free invoice generator: add your items, choose flat tax, per-line tax or GST mode, and the tax is calculated and shown on the invoice automatically — ready to download as a PDF.