To use a sales tax calculator, the user typically enters the price of the item they are purchasing and the sales tax rate for their location. The calculator then calculates the amount of sales tax that needs to be paid, and provides the total cost of the purchase including tax.Sales tax calculators can be useful for a variety of purposes, including budgeting, comparison shopping, and determining the final cost of a purchase. They are often available online as web-based tools or mobile apps, and many point-of-sale systems also have built-in sales tax calculators.
