Sales Tax & VAT Calculator
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Calculate tax amounts — add or remove any tax rate from a price, work out the pre-tax or post-tax figure from either direction, and calculate effective tax amounts.
Tax Calculator · supports tax inclusive and exclusive calculations · VAT and GST compliant
Add tax to a price (net → gross), remove tax from a price (gross → net), or find the tax amount from a gross figure.
Set the pre-tax or post-tax price and enter the applicable tax rate percentage.
Net price, tax amount, and gross price (tax-inclusive) are all displayed clearly.
Adding tax: multiply the net price by (1 + rate/100). A £100 price with 20% tax → £120. Removing tax (reverse calculation): divide the gross price by (1 + rate/100). A £120 price with 20% tax included → net price = 120 ÷ 1.20 = £100. The common mistake is subtracting 20% of the gross price (£120 × 0.20 = £24, leaving £96) — that’s incorrect.
Yes. GST and VAT are both percentage-based consumption taxes applied the same way — enter the rate applicable to your region (18% for standard Indian GST, 20% for UK VAT, 15% for UAE VAT, etc.). For split-rate tax structures, calculate each rate separately.
For multi-item tax calculations at different rates, use the Invoice Generator which handles line-item tax. This calculator handles one price and one tax rate at a time — useful for quick individual calculations.
No. All calculations run in your browser. No data is transmitted.
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Tax calculations appear straightforward but the reverse direction (extracting the pre-tax amount from a tax-inclusive price) is frequently done incorrectly — subtracting the tax rate percentage from the gross amount gives the wrong answer. This calculator handles both directions correctly: add tax to a net price or extract the net price from a tax-inclusive amount. It works for any percentage-based tax — VAT, GST, sales tax, or any other consumption tax — and shows the full breakdown of net amount, tax amount, and gross amount so the calculation is transparent.
All calculations run in your browser. No data is transmitted to any server.