Sales Tax Calculator
Add sales tax to a price, or remove it from a total.
Enter a price and a tax rate to see the sales tax and the final total. Switch to “remove tax” to work backward from a tax-inclusive total to the original pre-tax price. Results update as you type.
It works for any percentage-based sales tax — enter your state or local combined rate. (The rate field starts at 8.875%, New York City's combined rate.)
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Formula
Add sales tax
price × (rate ÷ 100) = tax; price + tax = total
Example: 8% on $100 → 100 × 0.08 = $8 tax, $108 total.
Remove sales tax
total ÷ (1 + rate ÷ 100) = pre-tax price
Example: $108 at 8% → 108 ÷ 1.08 = $100 pre-tax, $8 tax.
How to use the sales tax calculator
- 1Choose “Add tax” (price → total) or “Remove tax” (total → pre-tax).
- 2Enter the amount and the tax rate (your combined state + local rate).
- 3Read the tax amount and total (or pre-tax price); copy or share the result.
Examples
| Example | Input | Result |
|---|---|---|
| Add 8% | $100, 8% | $8 tax · $108 total |
| NYC rate | $50, 8.875% | $4.44 tax · $54.44 total |
| Remove tax | $108 total, 8% | $100 pre-tax · $8 tax |
How to calculate sales tax
Multiply the pre-tax price by the tax rate written as a decimal to get the tax, then add it back to the price for the total. A 7% tax on a $40 item is 40 × 0.07 = $2.80, so the total is $42.80.
To go the other way — finding the pre-tax price from a receipt total — divide the total by one plus the rate as a decimal. Don't simply subtract the percentage: $42.80 ÷ 1.07 = $40.00, whereas subtracting 7% would give the wrong answer.
US sales tax rates vary by location
There is no national US sales tax. Rates are set by states and localities and combine into a single rate at checkout — from 0% in states like Oregon and Delaware to over 10% in some cities. Always use the combined rate for the exact location of the sale. Some items (groceries, prescriptions) are taxed differently or exempt.
This tool provides estimates only. Sales tax rates and rules vary by state, locality, and product — verify the current rate for your location and consult a tax professional for official figures.
Frequently asked questions
How do I calculate sales tax?
Multiply the pre-tax price by the tax rate as a decimal. For 8% on $100: 100 × 0.08 = $8 tax, for a $108 total.
How do I remove sales tax from a total?
Divide the tax-inclusive total by (1 + rate ÷ 100). At 8%, divide by 1.08: a $108 total is $100 before tax. Don't just subtract the percentage.
What is the average US sales tax rate?
Combined state and local rates average roughly 7–8%, but they range from 0% to over 10% depending on the state and city.
Is sales tax the same as VAT?
No. Sales tax is charged once, at the final point of sale. VAT is collected at each stage of the supply chain. The math is similar — see our VAT calculator.
Embed this calculator
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<iframe src="https://numvella.com/embed/sales-tax-calculator" width="100%" height="460" style="border:1px solid #e2e8f0;border-radius:12px" title="Sales Tax Calculator — Numvella" loading="lazy"></iframe>Related calculators
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