To use the Sales Tax Calculator, enter the price of the item before tax and the sales tax rate. If you know the total price after tax, you can enter that instead along with one of the other values. The calculator will compute the missing value for you. For more accurate results, especially for vehicle-related purchases, you can enter your zip code to adjust for local tax rates.
The core formula used by this calculator is:
This formula allows you to calculate the total price after tax if you know the before-tax price and the sales tax rate. Alternatively, you can rearrange the formula to solve for the before-tax price or the sales tax rate if the other two values are known.
Suppose you are purchasing an item priced at $100 before tax, and the sales tax rate is 6.5%. The calculator will compute the tax amount as $6.50, making the total price after tax $106.50. If you only know the total price after tax and the tax rate, the calculator can determine the original price before tax.
While this calculator provides a quick estimate, always verify the tax rates with local authorities for the most accurate results. For vehicle purchases, additional fees may apply, so consult with the dealer or local DMV for comprehensive cost details.
For more financial tools, check out our Mortgage Calculator and Auto Loan Calculator.