Sales Tax Calculator
About Sales Tax Calculator
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 : Use Sales Tax Calculator from the Business category.
- Check the inputs : Review the required values and any optional settings.
- Read the formula : Use the formula and notes below to understand how the result is produced.
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).
Inputs
- Subtotal
- Tax rate
Outputs
- Tax amount
- total
- Effective rate
Formula
Tax = subtotal × tax rate. Total = subtotal + tax.