# Sales Tax Calculator — Add Tax to a Price

Add sales tax to a price and see the tax amount and total from any tax rate. 100% in your browser — free, no sign-up.

## What it calculates

Enter a pre-tax amount and a tax rate and it shows the sales tax and the final total. You supply the rate, so it works anywhere — there is nothing tied to a specific state or country.

## How it works

It multiplies your amount by the rate and adds it to the total, updating as you type in your browser. Enter the exact combined rate for your location to get an accurate total.

## The formula

Sales tax = amount × (rate ÷ 100). Total = amount + sales tax. Example: an 8.25% rate on a 100.00 purchase = 8.25 tax, total 108.25. To find the pre-tax price from a total: price = total ÷ (1 + rate ÷ 100).

## Why rates vary

In the US, sales tax is set by state, county, and city, so the combined rate differs from place to place and some items are exempt. Always use the rate that applies where the sale happens — this tool does not assume a location.

## How to

1. Enter the amount before tax.
2. Enter your local tax rate (%).
3. Read the tax and total instantly.

## FAQ

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

Multiply the amount by the rate ÷ 100 to get the tax, then add it. E.g. 8.25% on 100 = 8.25 tax, total 108.25.

**How do I find the pre-tax price from a total?**

Divide the total by (1 + rate ÷ 100). E.g. 108.25 ÷ 1.0825 = 100.00 before tax.

**Why isn't my state's rate built in?**

US sales tax varies by state, county, and city, and some items are exempt — so you enter your exact combined rate for an accurate total.

**Is it free?**

Yes, completely free — no sign-up and no watermark.

**Is my data private?**

Yes — this tool runs entirely in your browser. Your files and text are never uploaded.


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