VAT / Sales Tax Calculator – Price Before and After Tax
Use this free VAT / sales tax calculator to work out how much tax is added to a price. Enter the price before tax and the applicable tax rate to see the tax amount and the total price including tax for quick quotes or invoices.
VAT / Sales Tax Calculator
Quickly add VAT or sales tax to a price. Enter the price before tax and the tax rate to see the tax amount and price including tax.
How the VAT / sales tax formula works
VAT and sales tax are usually charged as a percentage of the price before tax. If a product costs P and the tax rate is r%, the tax amount and total price including tax are calculated as:
Tax = P × (r ÷ 100)
Price with tax = P + Tax
Some systems quote prices including tax by default, others quote before tax. This calculator focuses on the common case where you know the price before tax and need to add VAT or sales tax at a given percentage.
Everyday uses for a VAT / sales tax calculator
Whether you run a small business, work in finance or just want to know the final price at the till, a VAT / sales tax calculator saves time and reduces mistakes. It is especially handy when tax rates differ by region or product type and you need to quote prices quickly while keeping tax separate in your records.
For example, you might use this calculator to check how much tax is included in a client invoice, to separate revenue and tax components in your accounts or to compare prices across regions with different VAT or sales tax rates. By pairing it with tools like the salary and paycheck calculators, you can also see how taxes affect both what you earn and what you spend.