State tax math
Sales Tax Calculator — Add or Remove Sales Tax for Any State
Quick answer: This sales tax calculator lets you add tax to a price, remove tax from a total, and compare state-level sales tax side by side.
Choose a state and the page updates instantly using 2025 state-level rates for all 50 states plus DC.
Most sales tax tools only solve the easy direction: price first, tax second. This one also handles reverse sales tax math so you can work backward from a receipt total, estimate the pre-tax price, and compare how the same purchase changes from one state to another.
Sales Tax Calculator
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Three sales tax calculators on one page
Use the same 2025 state-level tax dataset to add tax, remove tax, and compare state totals without refreshing the page.
Add sales tax
Remove sales tax
Compare states
This calculator uses 2025 state-level sales tax rates for all 50 states plus the District of Columbia. Local city, county, and special district taxes are not included here.
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Which states have the highest and lowest sales tax?
At the state level, California has the highest statewide sales tax rate at 7.25%, while Colorado has the lowest non-zero statewide rate at 2.90%. Five states have no statewide sales tax at all: Alaska, Delaware, Montana, New Hampshire, and Oregon.
| Category | States | Statewide rate |
|---|---|---|
| Highest statewide rate | California | 7.25% |
| Next highest statewide rates | Indiana, Mississippi, Rhode Island, Tennessee | 7.00% |
| Lowest non-zero statewide rate | Colorado | 2.90% |
| No statewide sales tax | Alaska, Delaware, Montana, New Hampshire, Oregon | 0.00% |
2025 state sales tax rates by state
Use this table if you are asking questions like “how much is sales tax on this purchase?” or “which state has lower tax on the same item?” These are state-level rates only, so your actual checkout price may be higher when local tax applies.
| State | Rate |
|---|
Frequently Asked Questions
Multiply the pre-tax price by the state sales tax rate, then add that tax amount back to the price. This page does that instantly after you choose a state.
Divide the total by one plus the tax rate. That gives the pre-tax amount, and the difference between the original total and the pre-tax amount is the tax included.
Oregon, Montana, New Hampshire, Delaware, and Alaska have no statewide sales tax. Alaska can still have local sales taxes depending on where you buy.
No. This calculator uses statewide rates for 2025. Counties, cities, and special districts can add more tax on top of the state rate.
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