Add US sales tax to a price or reverse it out of a total. Enter your combined state plus local rate, or pick a common preset, and see the subtotal, the tax, and the total.
How to use the Sales Tax Calculator
Choose the direction: add sales tax (subtotal to total) or reverse it (total to subtotal).
Enter the amount in USD.
Enter your combined state plus local sales tax rate, or tap a common preset.
See the pre-tax subtotal, the sales tax, and the total instantly.
Frequently asked questions
There is no single national rate. The US has no federal sales tax or VAT, so the rate is set by each state and often by the county or city on top. Combined rates range from 0 in a few states to over 10% in some localities. Enter the combined state plus local rate that applies where you buy.
Multiply the pre-tax price by the rate. At 7% a 100 USD subtotal has 7 USD of tax, for a 107 USD total. Choose add sales tax and the calculator does this for you.
Divide the tax-inclusive total by 1 plus the rate. At 7% a 107 USD total is 100 USD subtotal plus 7 USD tax. Choose reverse and the calculator splits the total back into subtotal and tax.
Oregon, Delaware, Montana, and New Hampshire have no statewide sales tax (Alaska has no state rate but allows local sales taxes). For those, use a rate of 0 unless a local tax applies.
This calculator adds sales tax to a pre-tax price or reverses it out of a tax-inclusive total. Because US sales tax varies by state and locality, you enter the combined rate yourself, or pick a common preset such as 0, 4, 6, 7, 8.25, or 10%.
Everything runs in your browser; no data is sent to any server. Sales tax rules, sourcing, and taxable categories differ by state, so this is an estimate only and not tax advice.
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