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.
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This utility is a high-performance node optimized for modern browser environments. All data processing is executed client-side, ensuring zero knowledge transfer to external servers.
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.