Add or remove GST, VAT, or sales tax from any price instantly. Includes country rate presets and reverse (tax-inclusive) calculation, free, private, and processed locally.
The GST / VAT / Sales Tax Calculator adds tax to a net price or strips it out of a tax-inclusive total, with rate presets for the UK, EU, Australia, India, Canada, and more. It shows the net, tax, and gross breakdown instantly and processes everything locally.
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Adding tax takes a net price up to the gross a customer pays; removing (reverse) tax works backward from a gross total to find the net and the tax hidden inside it. Mixing these up is a common invoicing error, the calculator keeps the two directions explicit.
Choose to add tax to a net price or remove tax from a gross total.
Select a country preset or type a custom rate for your region.
Add the price and see net, tax amount, and gross calculated instantly.
Copy the figures for an invoice, quote, or expense record.
You can't find the tax in a gross amount by simply taking the rate off the total, the math works on the net figure, not the gross. Reverse mode applies the correct formula so a 20% VAT is properly extracted from an inclusive price.
GST, VAT, and sales tax rates vary by country and sometimes by product. Presets get common rates right instantly, while custom rates cover regional or reduced rates, so the breakdown always matches your jurisdiction.
Multiply the net (pre-tax) amount by the tax rate to get the tax, then add it to the net. For example, £100 + 20% VAT = £100 × 0.20 = £20 tax, so the gross price is £120. Select 'Add Tax', enter your amount and rate, and the calculator does this for you.
Divide the gross (tax-inclusive) amount by 1 plus the rate. For example, to remove 20% VAT from £120: £120 ÷ 1.20 = £100 net, and the tax portion is £20. Choose 'Remove Tax' to run this reverse calculation automatically.
This tool includes common presets, UK VAT 20%, Australia GST 10%, India GST 18%, Canada GST 5%, and more, but rates vary by product category and region. Use the custom rate field to match your exact local rate, and confirm with your local tax authority for compliance.
No. All calculations run entirely in your browser. Amounts and results are never uploaded, logged, or shared.
To add tax, multiply the net price by (1 + rate). To remove it, divide the gross price by (1 + rate). At 20% VAT, $100 net becomes $120 gross, and $120 gross is $100 net. Choose add or remove mode and enter your rate.
Tax included = gross - gross / (1 + rate). On a $120 total at 20%, the VAT portion is 120 - 100 = $20. Use remove/reverse mode to extract the tax from an inclusive price.
Yes. Enter any custom rate, so it works for VAT, GST or sales tax in any country, and it shows the net, tax and gross amounts clearly.
Switch to reverse mode and enter the gross amount, the tool extracts the net price and the tax it contains using the correct formula.
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