Sales Tax Calculator
Add tax to a pre-tax price, or back out the tax from a total. Works with any tax rate.
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Pre-tax price
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Tax amount
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Total with tax
Frequently asked questions
How do I calculate sales tax? ›
Tax Amount = Price × (Tax Rate ÷ 100). Total = Price + Tax Amount. Example: $100 at 8.5% → Tax = $8.50 → Total = $108.50.
How do I back out tax from a total price? ›
Pre-tax Price = Total ÷ (1 + Tax Rate ÷ 100). Tax Amount = Total − Pre-tax Price. Example: $108.50 total at 8.5% → Pre-tax = $108.50 ÷ 1.085 = $100.00. Tax = $8.50.
What is the average US sales tax rate? ›
The average combined state and local sales tax rate in the US is about 6–8% depending on location. Some states (Oregon, Montana, New Hampshire, Delaware, Alaska) have no sales tax. California has the highest statewide rate at 7.25%, with some local areas reaching over 10%.
About this sales tax calculator
This calculator works in two directions: add a tax rate to a pre-tax price to find your total, or enter a tax-inclusive total to back out the original price and tax amount. Useful for shopping, invoicing, accounting, and understanding receipts.