Sales Tax Calculator

About Sales Tax Calculator

A sales tax calculator adds tax to a price, or works backwards to remove it. Enter an amount and a tax rate to add tax on top, or switch to reverse mode to pull the tax back out of a total that already includes it — showing the pre-tax price and the tax portion. It's useful for shopping, invoicing, expense reports, and bookkeeping, and runs instantly in your browser.

Frequently asked questions

How do I calculate sales tax on a price?

Multiply the pre-tax amount by the tax rate. For example, $100 at 8.25% is $100 × 0.0825 = $8.25 in tax, for a $108.25 total. This calculator does it instantly.

How do I remove sales tax from a total?

Turn on 'Amount already includes tax'. This reverse sales tax calculator divides the total by 1 plus the rate to find the pre-tax price, then shows the tax that was included — handy for backing tax out of a receipt.

What sales tax rate should I use?

Rates vary by country, state, and city. Enter the combined rate that applies to your purchase — the calculator works with any percentage you type. It doesn't look up rates by ZIP or state for you.

Is my data saved?

No. The calculation happens entirely in your browser and nothing is uploaded or stored.