Sales Tax Calculator: Tax Amount and Total

Calculate the tax and total

Enter the pre-tax amount and the tax percentage you have confirmed for the purchase. 80.00 at 8.25% adds 6.60 in tax, for a total of 86.60.

How it works

Tax = pre-tax amount × rate ÷ 100. Round the tax to two decimal places, with half a cent up, then add it to the original amount. A zero rate adds no tax.

What this estimate covers

The entered rate applies to the entire amount. The calculator does not know your location, item category, exemption, tax holiday, or seller’s rounding procedure. It is an arithmetic estimate, not a determination of tax owed. No external rate data is fetched, so there is no rate-update timestamp to show.

Amounts run from zero to 10,000,000 and rates from zero to 100%, each with up to two decimal places. Use digits and a decimal point, without commas or currency symbols. To apply a discount first, use the Discount calculator.

FAQs

Where does the tax rate come from?

You supply it. Check the seller or relevant tax authority for the rate that applies to your purchase and location. This calculator has no tax-rate database.

Does every item have the same tax rate?

Not necessarily. This calculation applies one rate to the full amount. Exempt items, multiple rates, and special charges are outside its scope.

Why might a receipt differ by a cent?

A seller may round tax separately on each item. This tool calculates and rounds tax once for the total amount you enter.

Can I use this for a tax-inclusive price?

Enter a pre-tax amount here. The tool adds tax; it does not extract included tax or determine which rules apply.

Sales tax calculator