Sales Tax Calculator
Calculate sales tax amount, total price and reverse-calculate pre-tax price instantly.
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Frequently Asked Questions
What is the average sales tax rate in the US?
The US has no federal sales tax. Combined state and local sales tax averages about 7.12% nationwide. States range from 0% (Oregon, Montana, New Hampshire, Delaware, Alaska) to 9.5%+ (Louisiana, Tennessee). Some cities add additional local taxes on top of the state rate.
How do I calculate sales tax?
Sales tax = Price × Tax Rate. Total = Price + (Price × Tax Rate) = Price × (1 + Tax Rate). To find pre-tax price from a total: Pre-Tax = Total ÷ (1 + Tax Rate). For example, $108.50 total at 8.5% tax: pre-tax = $108.50 ÷ 1.085 = $100.
Are all purchases subject to sales tax?
No. Most states exempt groceries, prescription medications and medical devices. Some states also exempt clothing below a certain price. Online purchases are now subject to sales tax in most states following the 2018 South Dakota v. Wayfair Supreme Court ruling.