Free Sales Tax Calculator — All US States

Add sales tax to a price, extract tax from a tax-included total (reverse), or total a cart — for any US state rate, instantly and free.

How to use the Sales Tax Calculator

  1. Enter Price: Enter the original price of the item
  2. Enter Tax Rate: Enter the sales tax rate percentage for your state or city
  3. Calculate: Click Calculate to see the tax amount and final total price
  4. Verify: Use the result to verify receipts or plan purchases

Frequently Asked Questions

How do I calculate sales tax?

Multiply the item price by the tax rate percentage divided by 100. For example, a $100 item with 8% tax = $100 × 0.08 = $8 tax, making the total $108.

Which US state has the highest sales tax?

Louisiana and Tennessee have some of the highest combined state and local sales tax rates, often exceeding 10%. States like Oregon, Montana, and Delaware have no sales tax.

Is sales tax calculated before or after discounts?

Sales tax is typically calculated after discounts are applied to the final price. Use our calculator to find the exact tax amount after any discounts.

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