Sales Tax / VAT / GST Calculator

Understanding the Sales Tax / VAT / GST Calculator

The Sales Tax / VAT / GST Calculator works out consumption tax for any region and rate. Use Add-tax mode when you have a pre-tax price and want to see the tax and final total, or Remove-tax mode when you have a tax-inclusive total and need to extract the tax and recover the original net price. The same maths covers different systems around the world: US sales tax (set by each state and often topped up by county or city), UK and EU VAT (Value Added Tax), and India GST (Goods & Services Tax slabs). Region-grouped presets fill in common rates, but the tool works with any rate you type, so it is accurate wherever you are. Results show the net (pre-tax) amount, the tax amount, and the gross (total) side by side, formatted in your chosen currency, with copy, CSV and print options.

How it works

Pick a mode, type an amount and a tax rate, then press Calculate. In Add-tax mode the amount you enter is treated as the net price: tax is calculated on top and added to give the gross total. In Remove-tax mode the amount is treated as tax-inclusive: the tool divides it back out to find the original net price, then reports the tax that was baked in. The quick-rate buttons are grouped by region so you choose the right system for where you are: India GST slabs (5, 12, 18 and 28%), UK/EU VAT (20% UK standard rate), and common US sales-tax rates (7.25% and 8.875%). These presets are convenience shortcuts only — you can clear them and enter any rate, since rates and rules vary by country, state and even by item. The three result cards update together, and a friendly message appears if an input is missing or invalid.

Tips & common mistakes

• Pick the preset for your region first: US presets are sales tax (state + local), the 20% preset is UK VAT, and the 5/12/18/28% presets are India GST slabs. If none match, just type your own rate.
• US sales tax is not nationwide — each state sets its own rate and cities/counties add local tax, so combine them into one figure (for example 6% state + 1.25% local = 7.25%).
• UK and EU prices usually include VAT already, so use Remove-tax mode on a VAT-inclusive total to find the net price and the VAT amount.
• India GST is charged in fixed slabs (5, 12, 18 or 28%) that depend on the goods or service, so confirm which slab applies before you calculate.
• The math is exact for whatever rate you enter — always check the current rate for your jurisdiction, since rates and rules change and vary by item.
• Switch your site currency before calculating so the net, tax and gross figures display in the right symbol, then use Copy or Download CSV to drop the breakdown into an invoice or expense report.

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