Calculator

Sales Tax (GST) Calculator

Add GST to a price or take it out of a tax-inclusive amount.

Rs

Before tax when adding, tax-inclusive when taking it out.

%
Results update as you type.

Price with tax

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Price before tax
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Tax
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Price with tax
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Formulas

  • Adding tax: tax = price × rate; total = price + tax.
  • Taking tax out: price before tax = total ÷ (1 + rate); tax = total − price before tax. Taking 18% off a tax-inclusive total would be wrong: the tax is 18% of the price before tax, not of the total.

Rates in the presets are standard rates at the time of writing; reduced rates, exemptions and provincial rates differ by item and service, so check the rate that applies to you.