Sales Tax Calculator
Add tax to a price or pull it back out of a tax-inclusive total — at any rate, both directions.
Reviewed by the OmniCalc teamMethod verified 2026-07-01
108.50
Total 108.50- Net (before tax)
- 100.00
- Sales tax
- 8.50
- Total (with tax)
- 108.50
Show steps
- Tax = net × rate = 100.00 × 8.5% = 8.50.
- Total = net + tax = 100.00 + 8.50 = 108.50.
How to use the sales tax calculator
- 1Pick whether your amount is pre-tax (add tax) or tax-included (remove tax).
- 2Enter the amount and the tax rate.
- 3Read the net, the tax and the total.
Removing tax isn't just subtracting the percentage
To back tax out of a gross figure you divide by 1 + rate, not subtract the rate. Subtracting 8.5% from $108.50 gives $99.28 — wrong; the true net is $100.
Frequently asked questions
How do I add sales tax to a price?
Multiply the price by the rate to get the tax (100 × 8.5% = 8.50), then add it (108.50). Choose 'pre-tax' mode and the calculator shows both.
How do I remove tax from a total?
You can't just subtract the percentage. Divide the tax-inclusive total by (1 + rate): a $108.50 total at 8.5% has a net of 108.50 ÷ 1.085 = $100. Use 'tax-included' mode for this.
Is VAT the same as sales tax?
For a single final price the arithmetic is identical — a percentage on top of a net amount. They differ in how they're collected through a supply chain, but this calculator handles either at whatever rate you enter.