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US Sales Tax Calculator
Calculate sales tax on a purchase price, or reverse a tax-inclusive total. Built for US shoppers and small sellers.
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Tool workspace
State presets use typical combined state + average local rates for planning. Your city or special district can differ. Not a tax filing tool.
Total with tax
$0
Subtotal$0
Discount$0
Taxable amount$0
Sales tax$0
Rate used0%
Per item with tax$0
How it works
- Enter the item price, quantity, and any discount.
- Pick a U.S. state average combined rate or type a custom percent.
- Toggle tax-inclusive to back out tax, then read tax, taxable amount, and total.
Features
- Add tax or remove tax (reverse / tax-inclusive)
- All 50 states plus D.C. with typical combined rates
- Custom rate override
- Quantity and percent or dollar discounts
- US dollar display
Add sales tax or reverse it from a total
In add-tax mode, enter a price, quantity, and discount to see the tax and final total. Turn on tax-inclusive mode to work backward from a receipt total to the pre-tax price, which is useful for expense reports and bookkeeping.
The formula is simple: tax = price × rate. To remove tax from a total, divide the total by 1 + rate. For example, $108.20 ÷ 1.082 = $100.00 before 8.2% tax.
How to calculate sales tax from the total
If a receipt shows only the total, divide it by 1 plus the tax rate to get the price before tax. A $54 total at 8% tax is $54 ÷ 1.08 = $50.00, so the tax was $4.00. Turn on tax-inclusive mode above and the calculator does this for you.
To add state and local sales tax, add the two percentages together first. A 6% state rate plus a 2.5% local rate gives 8.5% combined, which you then apply to the price.
State and local sales tax rates
Sales tax in the United States is set by states, counties, and cities, so the rate you pay depends on where you buy. Presets use average combined state and local rates. Alaska, Delaware, Montana, New Hampshire, and Oregon have no statewide sales tax, though some Alaska towns add local tax.
US Sales Tax Calculator FAQ
No. Presets are statewide averages of state plus typical local tax. Enter the exact combined rate from your receipt or state department of revenue for a closer match.
The labels and rounding are aimed at U.S. sales tax. VAT-inclusive math is similar to reverse mode, but VAT rules differ.
Delaware, Montana, New Hampshire, and Oregon have 0% in this table. Alaska has no statewide rate but some local taxes, shown as a small average.
Discounts apply before tax in add-tax mode, which matches most U.S. retail receipts.
Divide the total by 1 plus the tax rate. For example, $54 ÷ 1.08 = $50, so the tax was $4. Use tax-inclusive mode to do it automatically.
Multiply $5 by 1 plus your rate. At 8% sales tax, $5 plus tax is $5.40. At 6%, it is $5.30.
It depends on your state and where the customer is located. Many states tax by the buyer’s location, and some by the seller’s. Check your state revenue department for the rate and your registration requirements. This calculator is for estimates, not tax advice.
Add the state rate and the local (county or city) rate to get the combined rate, then multiply the price by that rate.
Multiply $100 by your rate. At 8.25%, tax is $8.25 and the total is $108.25.