- The state list shows each state's general statewide rate — many cities and counties add local tax on top, so use the custom field for your exact combined rate (e.g. New York City is 8.875%).
- Adding tax: tax = price × rate ÷ 100, and the total is price + tax.
- Reversing a total: before-tax price = total ÷ (1 + rate/100), which is what shops do when a receipt shows tax included.
- Everything runs locally in your browser — nothing is uploaded.
Home › Sales Tax Calculator (US)
Sales Tax Calculator (US)
Add sales tax to any price in one click, or reverse a total back to the pre-tax price. Pick your state for its general rate, or enter any custom rate.
Add sales tax to a price
Tax: $7.25 | Total: $107.25
Calculate Sales Tax from total amount
Before tax: $100.00 | Tax paid: $7.25
How this sales tax calculator works
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Sources: IRS and state departments of revenue. Rates last verified September 2026. Estimates only — see our editorial policy.
Frequently asked questions
How do I calculate sales tax on a price?
Multiply the price by the tax rate and divide by 100. A $100 item at 7.25% California state tax costs $100 × 0.0725 = $7.25 tax, so the total is $107.25.
Which US states have no sales tax?
Five states charge no statewide sales tax: Oregon, Montana, New Hampshire, Delaware and Alaska. Alaska allows local sales taxes in some boroughs.
What is the average US sales tax rate?
Combined state and local rates average around 6.5–7% across the US. The highest combined rates are around 9–10% in parts of California, Washington, Tennessee and Louisiana.
Why is my local rate higher than the state rate?
Most states let cities, counties and special districts add their own tax on top of the state rate. If you know your exact combined rate, choose 'Custom rate' and enter it.
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Rates are the 2026/27 general statewide rates. Many localities add tax on top — check your exact combined rate for precise results.