Sales Tax Calculator
Quickly calculate sales tax amounts, gross order totals, and reverse pre-tax subtotal amounts using customizable state and local tax rates.
How to Calculate Sales Tax & Reverse Tax
Sales tax is a consumption tax imposed by state and local governments on the sale of retail goods and services.
Reverse Sales Tax Formula (Extracting Tax from Total)
If your receipt shows a grand total of $108.25 with an 8.25% sales tax rate, you can find the original pre-tax price using:
$108.25 ÷ 1.0825 = $100.00 pre-tax subtotal and $8.25 sales tax paid.
How to Use Sales Tax Calculator (Step-by-Step)
Select 'Add Sales Tax' or 'Reverse Tax' mode.
Enter item price or total amount paid.
Choose a US state preset or input custom state and local tax rates.
View the net subtotal, tax amount, and grand total with 1-click summary copy.
Applications
Common Use Cases
- Calculate total order cost including local and state sales tax.
- Extract pre-tax subtotal and sales tax paid from a receipt total.
- Check standard state tax rates across California, New York, Texas, and more.
Privacy Guarantee
Zero Server Uploads
Unlike traditional online converters that upload your confidential documents to external cloud servers, MultiToolX executes computations in your browser runtime via HTML5 Canvas, Web Crypto, and WebAssembly.
Your data never leaves your device and cannot be viewed, stored, or harvested by anyone.
How to Calculate Sales Tax & Reverse Tax: Complete Formula & Examples
A complete guide explaining how to calculate sales tax, combine state and municipal rates, and reverse calculate original pre-tax costs from gross receipt totals.
FAQ
Frequently Asked Questions
What is the formula for calculating sales tax?
Total Sales Tax = Pre-Tax Amount × (Combined Tax Rate ÷ 100). Final Total = Pre-Tax Amount + Total Sales Tax.
How do I calculate reverse sales tax?
Pre-Tax Subtotal = Total Amount ÷ (1 + Combined Tax Rate ÷ 100). The sales tax portion is Total Amount − Pre-Tax Subtotal.
Which states have no state sales tax?
Five US states do not levy statewide general sales taxes: Alaska, Delaware, Montana, New Hampshire, and Oregon.
Embed the Sales Tax Calculator on Your Website or Blog
Enhance your articles and give your visitors a fast, 100% free browser utility with zero installation. Copy our responsive iframe code with one click.
Related Free Browser Tools
YouTube Revenue Calculator
Estimate YouTube video and channel AdSense earnings, RPM by niche, and brand deals.
Crypto Profit Calculator
Calculate crypto trading profit/loss, ROI %, exchange fees, and DCA accumulation.
Freelance Rate Calculator
Calculate required hourly and day rates from target take-home salary and overhead.