Sales Tax Calculator
Add tax to a price, find the price before tax, or work out the tax rate you were charged — plus every state's base rate.
Calculate Sales Tax
Have a price and a tax rate — get the tax amount and total.
US State Sales Tax Rates (Reference)
Base state rate only — most cities and counties add their own local sales tax on top of this, so the rate you actually pay at checkout is often higher. Confirm your exact local rate before relying on it.
| State | Base Rate |
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How This Calculator Works
Add Tax — multiply your price by the tax rate to get the tax amount, then add it to the price: Total = Price × (1 + Rate). Use the Quantity field if you're buying more than one of the same item.
Remove Tax — if you only know the final total (like on a receipt), divide it by (1 + Rate) to back out the pre-tax price: Price = Total ÷ (1 + Rate).
Find Rate — if you know both the pre-tax price and the total, the difference tells you the tax rate that was actually charged: Rate = (Total − Price) ÷ Price.
On the Add Tax and Remove Tax tabs, picking a state fills in that state's base sales tax rate automatically — you can still edit it if your local combined rate is different.
Frequently Asked Questions
Multiply the price by the tax rate (as a decimal) to get the tax amount, then add it to the price for the total. For example, $100 × 7.25% = $7.25 tax, for a total of $107.25.
Divide the total by (1 + tax rate as a decimal). For example, $107.25 ÷ 1.0725 = $100.00 before tax.
No. Alaska, Delaware, Montana, New Hampshire and Oregon have no statewide sales tax. Alaska does allow individual cities and boroughs to charge their own local sales tax.
Most states allow cities, counties and special districts to add their own local sales tax on top of the state rate, so the combined rate you actually pay at checkout is often higher than the state's base rate.