# Sales Tax Calculator

URL: https://speedycalculator.com/calculators/finance/sales-tax/
Last updated: 2026-10-25

> The sales tax calculator adds sales tax to a price, removes it from a tax-inclusive price, or finds the tax rate from the net and gross prices – for any state, county or country.

## Inputs

- Net price (before tax)
- Sales tax rate (%)

## Results

- Tax amount
- Gross price (with tax)

## Formula

```
Gross price = net price × (1 + rate)
Net price = gross price ÷ (1 + rate)
Tax rate = (gross − net) ÷ net
```

## Explanation

U.S. sales tax is charged at the register on top of the shelf price, with combined state and local rates from 0% (in Delaware, Montana, New Hampshire and Oregon) to over 10%. Type into any result to work backwards.

### How to use the Sales Tax Calculator

- **Net price (before tax)**
- **Sales tax rate**
- Every result field is editable: type into **Gross price (with tax)** and **Net price (before tax)** plus every other field update to match.

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the net (pre-tax) price and the sales tax rate. Type a total price into the gross price to remove the tax.

### Tips

- Tax figures here are estimates for planning – your actual tax depends on credits, deductions and local rules.
- Check the tax year and filing status before you rely on a result.
- Use gross (before-tax) figures unless a field asks for take-home pay.
- When in doubt, confirm with the tax authority's own calculator or a tax professional.

### Common mistakes to avoid

- Confusing marginal and effective tax rates.
- Adding sales tax to a price that already includes it.
- Forgetting payroll taxes (Social Security and Medicare) on wages.

### Inputs explained

FieldWhat to enterNet price (before tax)Amount in your currencySales tax rateIn %

### What each result means

- **Tax amount** = [Net price (before tax)]×[Sales tax rate]÷100
- **Gross price (with tax)** = [Net price (before tax)]×(1 + [Sales tax rate]÷100)

### Example values

How the main result changes when **Net price** changes and everything else stays at the example values above:

Net price (before tax)Gross price (with tax)5054.137581.19100108.25125135.31150162.38200216.5

## Worked example

Inputs — Net price (before tax): $100; Sales tax rate: 8.25 %.

Results — Tax amount = $8.25; **Gross price (with tax) = $108.25**.

## FAQ

**How do I calculate sales tax?**
Price × tax rate; add it to the price for the total.

**How do I remove sales tax from a total?**
Divide by (1 + rate) – or type the total into the gross price.

**Which states have no sales tax?**
Alaska (state level), Delaware, Montana, New Hampshire and Oregon.

**What formula does the Sales Tax Calculator use?**
Gross price = net price × (1 + rate).


## Sources

- [Tax Foundation – State and local sales tax rates](https://taxfoundation.org/)