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  4. Sales Tax Calculator

Sales Tax Calculator

Last updated: March 27, 2026

Calculate sales tax on any purchase with this free sales tax calculator. Enter your purchase price and the applicable tax rate to see the exact sales tax amount and total cost instantly. Sales tax rates vary dramatically across the United States, ranging from 0% in five states to over 10% in some local jurisdictions. Whether you're planning a major purchase, preparing business invoices, or comparing prices across state lines, this calculator helps you make informed financial decisions.

Results

Enter your details and click Calculate to see results.

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Features

  • ▶Calculate sales tax for any price and rate
  • ▶Shows exact tax amount in dollars
  • ▶Displays total price including tax
  • ▶Works with any tax rate percentage
  • ▶Instant calculation with no sign-up required

How to Use This Tool

1

Enter the purchase price

Input the pre-tax price of the item or service you are buying.

2

Enter the tax rate

Input the applicable sales tax rate as a percentage. This varies by state and locality. For example, California is 7.25%, Texas is 6.25%, and New York City is 8.875%.

3

View your results

See the calculated tax amount and the total price you will pay at checkout.

Understanding Sales Tax Calculation

Sales tax is a consumption tax imposed by state and local governments on the sale of goods and services. This calculator uses forward calculation - you enter the price before tax and the applicable tax rate, and it calculates the tax amount and total including tax. The formula is: Sales Tax = Price x (Tax Rate / 100) and Total = Price + Sales Tax. For example, if you're buying a $1,000 laptop in Texas (6.25% state rate), the sales tax is $62.50 for a total of $1,062.50.

Reverse Calculation Formula

If you need to work backwards from a total that includes tax to find the pre-tax amount, the formula is: Pre-Tax Price = Total / (1 + Tax Rate as a decimal). For example, if a receipt shows $1,062.50 total in Texas (6.25% rate), the pre-tax price is $1,062.50 / 1.0625 = $1,000.00, with $62.50 in sales tax. This is useful when receipts don't itemize tax separately or when you need to separate business expenses from sales tax for accounting.

Tax-Free States

Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. However, Alaska allows local jurisdictions to impose sales taxes, so some areas of Alaska do charge sales tax. The remaining 45 states plus Washington D.C. Impose sales tax ranging from 2.9% (Colorado) to 7.25% (California).

Example: Business Invoice Preparation

  • -David runs a landscaping business in Tennessee and needs to prepare an invoice for $3,500 in services. Tennessee taxes services at 7%.
  • -Input: $3,500 service amount
  • -Convert to: Invoice total with Tennessee tax
  • -Result: $3,500 + $245 = $3,745 total to charge client
  • -David must remit the $245 to Tennessee Department of Revenue when filing his sales tax return.

Example: Finding Pre-Tax Amount from a Receipt

Jennifer's receipt shows $324.60 total for office supplies in Texas but doesn't show the pre-tax amount separately. She needs to determine the deductible business expense. Using the reverse formula: $324.60 / 1.0625 = $305.55 pre-tax, $19.05 sales tax. Jennifer can record $305.55 as business expense and $19.05 as sales tax paid.

Frequently Asked Questions

No, five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. However, Alaska allows local jurisdictions to impose sales taxes up to 7.5%, so some areas of Alaska do charge sales tax. The remaining 45 states plus Washington D.C. Impose sales tax ranging from 2.9% (Colorado) to 7.25% (California). When combined with local taxes, rates can exceed 10% in some jurisdictions - Louisiana has the highest combined average rate at 10.11%, followed by Tennessee at 9.55%.