Calculate sales tax amount and total price after tax.
Sales tax is added to almost every retail purchase in the US — but the rate varies dramatically from state to state and even city to city. Our Sales Tax Calculator lets you add a known tax rate to any purchase price to find the total, or reverse-calculate to determine the pre-tax price from a tax-included total.
It's the tool you use before making a large purchase, filing an expense report, or reconciling receipts — whenever the sales tax amount matters.
Enter your purchase price (before tax) and the applicable sales tax rate percentage. The calculator returns the tax amount and the total price with tax. Toggle to reverse mode to enter the tax-included total and compute the pre-tax amount.
Total = Price + Tax Amount
Reverse calculation (finding pre-tax price):
You're buying a laptop priced at $1,199.99 in Chicago, Illinois.
Illinois state tax rate: 6.25%
Cook County additional: 1.75%
City of Chicago additional: 1.25%
Total sales tax rate: 9.25% + special tax on electronics = 10.25% (for general merchandise in Chicago)
Total price = $1,199.99 + $122.99 = $1,322.98
Reverse example: You see a receipt showing $1,322.98 total. What was the pre-tax price?
Note: Sales tax rates in the US vary from 0% (Oregon, Montana, New Hampshire, Delaware) to over 10% (Chicago and some California cities).