Sales Tax Calculator
Free sales tax calculator: add tax to a price or pull it back out of a total, with combined average rates for all 50 US states. Runs in your browser.
updated
- ✓ Runs in your browser — nothing uploaded
- ✓ No sign-up
- ✓ Free, no limits
State presets are combined state-plus-average-local rates (Tax Foundation, 2024) — your city or county rate can differ, and some goods are taxed differently or exempt. Use your receipt’s exact rate for anything official. Reference figures, not tax advice.
This sales tax calculator works in both directions. Add tax to a pre-tax price to get the tax and the total, or run it in reverse — give it a tax-inclusive total and it splits out the original price and the tax hidden inside. The reverse mode is the one that's genuinely hard to do in your head, and it's what you need for expense reports and bookkeeping.
You can type any rate, or pick a US state to load its combined average rate — the state rate plus the average local (county and city) add-on, from the Tax Foundation's 2024 figures. Worked example: $100 at an 8.5% rate is $8.50 tax and a $108.50 total; run $108.50 back through the reverse mode and it returns $100 and $8.50. Five states — Delaware, Montana, New Hampshire, Oregon and Alaska (statewide) — levy no state sales tax, so their presets are at or near zero.
Two honest caveats: the state presets are averages, so your exact city or county rate can differ by a point or two, and some goods (groceries, clothing, prescriptions) are taxed at special rates or exempt entirely. Use your receipt's exact rate for anything official. The maths runs in your browser and nothing is uploaded.
Frequently asked questions
How do I calculate sales tax?
Multiply the price by the tax rate as a decimal: $100 at 8.5% is $100 × 0.085 = $8.50 tax, for a $108.50 total. Pick a state to load its combined average rate, or type your exact local rate.
How do I remove sales tax from a total?
Divide the total by 1 plus the rate: $108.50 ÷ 1.085 = $100 pre-tax, leaving $8.50 of tax. The reverse mode does this for you — the calculation behind every 'price includes tax' figure.
Are the state rates exact?
They're combined state-plus-average-local rates (Tax Foundation, 2024), so they're representative, not exact for your address. Local rates vary within a state, and some categories are taxed differently or exempt. Use your receipt's rate when precision matters.
Which US states have no sales tax?
Delaware, Montana, New Hampshire and Oregon have no state sales tax, and Alaska has none statewide (though some localities add one). Their presets here are zero or near it.