Sales Tax Calculator
Calculate sales tax on any purchase. Enter a price and tax rate to instantly see the tax amount and total cost.
Free Sales Tax Calculator
The SmarterSources Sales Tax Calculator makes it easy to determine how much tax you'll pay on any purchase. Enter the item price and your local sales tax rate to instantly see the tax amount and total cost. You can also switch to "Extract Tax" mode to find the pre-tax price from a total that already includes tax.
How to Calculate Sales Tax
To calculate sales tax, multiply the price by the tax rate expressed as a decimal. For example, an $80 item with a 7% tax rate: $80 x 0.07 = $5.60 tax. The total price would be $80 + $5.60 = $85.60.
How to Extract Tax from a Total
To find the pre-tax price from a total that includes tax, divide the total by (1 + tax rate as decimal). For example, if you paid $85.60 total with 7% tax: $85.60 / 1.07 = $80.00 pre-tax price. The tax amount was $5.60.
US Sales Tax Rates by State
Sales tax rates vary significantly across the United States. Five states have no state sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. The highest state rates include California (7.25%), Indiana (7%), Mississippi (7%), Rhode Island (7%), and Tennessee (7%). Many cities and counties add local taxes on top of state rates, making total rates even higher.
Frequently Asked Questions
How do you calculate sales tax?
Multiply the item price by the tax rate as a decimal. For example, 8% tax on a $50 item: $50 x 0.08 = $4.00 in tax, for a total of $54.00.
How do I find the pre-tax price from a receipt total?
Divide the total by (1 + tax rate). For example, $108 total with 8% tax: $108 / 1.08 = $100 pre-tax price.
Which US states have no sales tax?
Alaska, Delaware, Montana, New Hampshire, and Oregon have no state-level sales tax. However, some localities in Alaska do charge local sales taxes.
Is my data safe?
Yes. This calculator runs entirely in your browser. No data is sent to any server and nothing is stored.