Sales Tax Calculator
Add sales tax to any price or reverse-calculate the pre-tax amount from a total. Pick your state (rates include average local taxes) or enter a custom rate — instant results for every US state.
Sales Tax Calculator
Add sales tax to a price, or reverse-calculate the pre-tax amount
State + average local rate. Enter a custom rate below to override.
Rates shown are 2025 state averages including typical local sales taxes (state rate plus average county/city rates), based on Tax Foundation data. Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. For exact rates at checkout, check your city and county on your state revenue department site.
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Frequently Asked Questions
How do I calculate sales tax on a purchase?+
Multiply the price by the tax rate. On $1,000 in California (8.85% combined average), tax is $88.50, total $1,088.50. To find the pre-tax price from a total you paid, divide by (1 + rate): $1,088.50 / 1.0885 = $1,000.
Which states have no sales tax?+
Alaska, Delaware, Montana, New Hampshire, and Oregon have no statewide sales tax. Alaska and Montana still allow local taxes (Alaska averages 1.82% locally). The highest combined rates are in Tennessee (9.55%) and Louisiana (9.55%).
What is the difference between state and local sales tax?+
Every state sets its own base rate (e.g., California 7.25%, Texas 6.25%). Counties, cities, and special districts add their own rates on top — that's why the combined rate in Austin, TX is 8.25% and in LA it's 10.25%. This calculator uses each state's average combined rate.
How do I calculate sales tax on a purchase?
Multiply the price by the tax rate. On $1,000 in California (8.85% combined average), tax is $88.50, total $1,088.50. To find the pre-tax price from a total you paid, divide by (1 + rate): $1,088.50 / 1.0885 = $1,000.
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