Sales Tax Calculator
Calculate sales tax and total price.
Tax amount
$8.25
total
$108.25
Effective rate
8.25%
Formula
Tax = subtotal × tax rate. Total = subtotal + tax.
The sales tax calculator applies a tax rate to a subtotal and reports tax amount and final total.
How to Use
The sales tax calculator applies a tax rate to a subtotal and reports tax amount and final total. Enter the Subtotal and Tax rate values and review the Tax amount, total, and Effective rate outputs after you calculate.
- Open the calculator : Start with Sales Tax Calculator.
- Enter values : Fill in the required inputs and any optional settings.
- Review the result : Read the output and use the about page for more detail if needed.
Common Questions
What formula does the Sales Tax Calculator use?
Tax = subtotal × tax rate. Total = subtotal + tax.
How do you reverse calculate a price before sales tax?
To find the original price before tax was added, convert the tax rate to a decimal and add 1 (e.g., 8% becomes 1.08). Then, divide the total receipt price by that number. For example, a $108 total at an 8% tax rate means the pre-tax price was $100 ($108 ÷ 1.08 = $100).