Sales Tax Calculator

About Sales Tax Calculator

A sales tax calculator adds a tax rate to a pre-tax amount and shows both the tax and the total, so you know exactly what a purchase will cost at the register or what to charge on an invoice. Rates vary widely by place and category, so the tool takes the rate as an input rather than assuming one, which makes it work anywhere in the world. Type the amount and the rate, and the tax and the grand total appear instantly, worked out in your browser with no rounding surprises. Because tax rates differ by country, state, county and even product category, a calculator that hard-codes one rate is useless outside its home. This one takes the rate as an input, so the same page serves a shopper in one place and an invoicer in another without pretending there is a single correct figure. The distinction between adding tax and extracting it matters too: a shelf price that already includes tax needs the reverse calculation, which is what the VAT tool does. Keeping the two separate avoids the common error of applying an add-tax formula to a tax-inclusive price, which understates the tax every time. Enter your local rate once and the total is exact to the cent.