Quick answer: to calculate sales tax, multiply the price by the state's tax rate, then add that to the price. Our free Sales Tax Calculator does this instantly using current 2026 state rates for all 50 states.
The Sales Tax Formula
Tax = Price × Tax Rate, and Total = Price + Tax. For example, a $100 purchase in California (7.25% state rate) adds $7.25 in tax, for a total of $107.25.
State Rates Vary Enormously
California has the highest state-level rate at 7.25%. Indiana, Mississippi, Rhode Island, and Tennessee follow at 7%. Five states charge no state sales tax at all: Alaska, Delaware, Montana, New Hampshire, and Oregon.
Don't Forget Local Tax
Most states also let cities and counties add their own local sales tax on top of the state rate. In states like Alabama, Louisiana, and Colorado, local taxes can add 4-5% more, pushing the combined rate well above the state-level number alone. Always check your specific city or county for the exact combined rate before budgeting a big purchase.
Frequently Asked Questions
How do I calculate sales tax manually?
Multiply the price by the tax rate (as a decimal). A $50 item at 6% tax: 50 × 0.06 = $3.00 tax, for a $53.00 total.
Which state has the highest sales tax?
California has the highest state-level rate at 7.25%, though combined state+local rates in places like Louisiana and Tennessee can exceed 10%.
Are groceries taxed the same as other items?
Many states exempt or reduce tax on groceries, medicine, and clothing. Check your state's specific exemption rules.
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