Sales Tax Calculator

Add or remove sales tax from any price.

Never get surprised by sales tax at the register again. Our sales tax calculator instantly adds or removes sales tax from any price. Enter an amount and a local tax rate, and the tool shows the tax amount and the total, or works backward to find the pre-tax price from a final total. Perfect for budgeting a purchase, checking receipts, comparing prices across states, and understanding exactly what you are paying in tax. Fast, free, and accurate for any rate from 0 to 100 percent.

Sales Tax

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How to Use the Sales Tax Calculator

Our free sales tax calculator handles both adding and removing sales tax. Choose add tax to calculate the total including tax from a pre-tax price, or remove tax to find the pre-tax price from a total that already includes tax. Enter the amount and sales tax rate, and the calculator shows the tax amount, pre-tax price, and total.

Example Calculations

  • $100 item at 8% sales tax (add tax): Tax = $8.00. Total with tax = $108.00. Pre-tax price = $100.00. Common for general purchases.
  • $150 total at 7% sales tax (remove tax): Pre-tax price = $140.19. Tax = $9.81. Useful when you need to know the taxable amount from a receipt.
  • $50 item at 10% sales tax (add tax): Tax = $5.00. Total with tax = $55.00. Higher tax rate cities like Chicago or Seattle.

Frequently Asked Questions

How do I calculate sales tax?
Multiply the price by the sales tax rate divided by 100. Example: $100 item with 8% tax = $100 x 0.08 = $8 tax. The total including tax would be $108. Our calculator does this instantly in both directions.

How do I find the pre-tax price from a total?
Divide the total by (1 + tax rate/100). For example, if you paid $108 total and the tax rate is 8%: $108 / 1.08 = $100 pre-tax price. This is useful for expense reports and budgeting.

What items are exempt from sales tax?
Common exemptions include most groceries (uncooked food), prescription medications, medical devices, and clothing in some states. Each state has its own rules — check your local tax authority for specifics on what's taxable in your area.

Which states have no sales tax?
As of 2026, five states have no state-level sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. However, some local jurisdictions in these states (particularly in Alaska) may impose their own sales taxes.

How do I calculate sales tax?
Multiply the price by the sales tax rate divided by 100. Example: $100 item with 8% tax = $100 x 0.08 = $8 tax. The total including tax would be $108. Always check if your state exempts certain items.

Also check our Tip Calculator, Budget Calculator, and all tools.