Free Sales Tax Calculator



Free Sales Tax Calculator – Calculate Tax on Any Purchase Instantly

Shopping, invoicing, or running a business and need to know the exact sales tax on a purchase? Our free Sales Tax Calculator instantly calculates the tax amount and final total based on the price and tax rate — or works backward to find the pre-tax price from a total. No sign-up, no downloads.

🧾 Sales Tax Calculator

Original Price
$0.00
Tax Amount
$0.00
Final Total
$0.00

How to Use the Sales Tax Calculator

  1. Choose a mode: Add Tax to Price (you know the price before tax) or Remove Tax from Total (you know the final amount and want to find the original price).
  2. Enter the price or total amount.
  3. Enter the sales tax rate as a percentage (e.g., 8.5 for 8.5%).
  4. Click Calculate to instantly see the original price, tax amount, and final total.
  5. Click Reset to clear all fields and start over.

Features of This Free Sales Tax Calculator

  • ✅ Two modes: add tax or reverse-calculate tax from a total
  • ✅ Works with any tax rate or currency
  • ✅ Instant, accurate calculations
  • ✅ Clean breakdown: original price, tax amount, and final total
  • ✅ Fully responsive colorful design for mobile and desktop
  • ✅ 100% free, no sign-up or installation
  • ✅ Built with pure HTML, CSS, and JavaScript

Why Use a Sales Tax Calculator?

Sales tax rates vary by state, country, and product type, making manual calculation error-prone — especially for business owners creating invoices or shoppers budgeting large purchases. This tool removes the guesswork, whether you need to add tax to a listed price or figure out how much tax was included in a total you already paid.

Frequently Asked Questions

Is this sales tax calculator free?
Yes, it's completely free with no sign-up required.

Can I use this for any country's tax system?
Yes, simply enter the applicable tax rate for your region — the calculator works with any percentage.

How does "Remove Tax from Total" work?
It reverse-calculates the original price when you only know the final amount you paid, which already includes tax.

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