Sales Tax Calculator

Overview

Use this sales tax calculator to add tax to a price or remove tax that is already included.

Enter the amount and tax rate, then choose whether to add or remove tax.

Sales Tax Formula

• Tax amount = price x tax rate / 100.
• Tax-inclusive total = price + tax amount.
• When tax is included, pre-tax price = total / (1 + tax rate).

Practical Tips

• Use the tax rate that applies to your local purchase.
• For invoices, check whether the listed amount already includes tax before choosing a mode.