Sales Tax Calculator
The Sales Tax Calculator shows the tax amount and total price when a purchase price and tax rate are supplied. It is useful for quickly checking the final cost before tax or after tax.
How to use this calculator
Enter the original price and the applicable sales-tax rate. If your purchase has multiple tax rates or special exemptions, calculate each applicable portion separately rather than assuming one rate applies to everything.
Formula
Sales tax = price Γ tax rate; final price = price + sales tax.
A useful way to check it
For a $100 purchase with a 10% tax rate, the tax is $10 and the total is $110. Actual checkout totals can differ when discounts, exemptions, fees, or local tax rules apply.