# How much is the sales tax?

Enter a price and the tax rate. See the tax and the total, or work back from a total that includes tax.

 Price ($)
 Sales tax rate (%)
 The price is

Use the combined state and local rate for where the item is delivered; online sellers charge the rate at the delivery address.

## Tax at common rates

## How it works

Tax = price × rate; total = price × (1 + rate). From a total that includes tax, the pre-tax price = total ÷ (1 + rate).

Shopping around? [Shopping list total](https://sharpest.ai/tools/shopping-list) finds the cheapest price for each thing you need.

## Questions

### How do I add sales tax to a price?

Multiply the price by one plus the tax rate. A $100 item at 7% tax costs 100 × 1.07 = $107.

### How do I take sales tax out of a total?

Divide the total by one plus the rate. A $107 receipt at 7% tax was $100 before tax, with $7 of tax. Taking 7% off $107 gives $99.51, which is wrong.

### Which sales tax rate applies when I shop online?

Online sellers charge the combined state and local rate at the delivery address, not where the seller is. Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire and Oregon, though some Alaska towns add their own.

### Is shipping taxed?

In many states shipping is taxable when the item is, and in others it is exempt if listed separately. Check your state's rules if the amount matters.

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As of 2026-11-12. Canonical page: https://sharpest.ai/tools/sales-tax