Sales Tax Calculator
Calculate sales tax three ways: add it, remove it, or work backwards to the rate.
- Runs on your device
- No watermark
- Free, no signup needed
- Available offline
How to use it
- Choose add, remove or find the rate.
- Enter the price and the tax rate.
- Read the tax and the total.
Questions
How do I add sales tax to a price?
Multiply the price by 1 plus the rate. At 8.25%, $100 × 1.0825 = $108.25, so the tax is $8.25.
How do I remove sales tax from a total?
Divide the total by 1 plus the rate. $108.25 ÷ 1.0825 = $100. Taking 8.25% off the total would give the wrong answer, because the tax was worked out on the smaller pre-tax price.
How do I find the tax rate from a receipt?
Divide the total by the pre-tax price, subtract 1 and multiply by 100. $108.25 ÷ $100 = 1.0825, so the rate is 8.25%.
Does it work for GST, HST or VAT?
Yes. The math is the same for any tax added as a percentage of the price, such as Canada’s 5% GST, Ontario’s 13% HST or Australia’s 10% GST. Australian shelf prices usually include GST, so use Remove to see the tax.
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