Money & Finance
Sales Tax Calculator
Calculate the sales tax amount and final price for any purchase, or reverse-calculate the pre-tax price from a total.
$
%
Pre-tax price
$100.00
Sales tax
$7.25
Total price
$107.25
How the Sales Tax Calculator works
Choose whether you're adding tax to a pre-tax price or removing tax from a total you already paid, enter the tax rate, and the pre-tax price, tax amount, and total update instantly.
Frequently asked questions
How do I find my local sales tax rate?
Combined state, county, and city sales tax rates vary widely by location — check your receipt from a recent purchase or your state's department of revenue website.
Can I work backward from a total price?
Yes — switch to "Remove tax from total" and enter the total price you paid to find the original pre-tax price and the tax amount.
Does this work for VAT too?
Yes — the math is the same for value-added tax; just enter your local VAT rate instead of a sales tax rate.
Guides that cover this
The Complete Guide to Managing Your Money With Free CalculatorsA practical walkthrough of budgeting, debt payoff, saving, and home-buying math — and the free calculators that handle each step.How Sales Tax Is Calculated on a Purchase With a DiscountA worked example showing whether sales tax applies before or after a discount, and why the order changes the final total.Why Two Receipts for the Same Item Showed Different Sales TaxThe most common reasons identical purchases show different sales tax amounts — different tax jurisdictions, item category rules, and rounding.Sales Tax vs. VAT: How They Actually DifferThe structural difference between US-style sales tax (applied once at final sale) and VAT (applied at each stage of production).How to Use the Sales Tax CalculatorA quick walkthrough of finding the tax amount and total price on a purchase, or working backward from a tax-included total.Sales Tax Calculator: How It Works and How to Use ItA quick guide to the sales tax calculator — what it calculates, how the math works, and tips for getting an accurate result.