FINANCIAL · SALES TAX
Sales Tax Calculator
Calculate sales tax and total purchase price instantly. Enter any price and tax rate — or reverse-calculate the pre-tax price.
Sales Tax
$8.25
8.25% of purchase
Pre-tax price$100.00
Sales tax$8.25
Total$108.25
About This Calculator
Quickly calculate the sales tax amount and total price for any purchase. Works in both directions: enter a pre-tax price to find the total, or enter a tax-inclusive price to find the pre-tax amount.
How It Works
Choose your calculation direction — forward (price to total) or reverse (total to pre-tax). Enter the dollar amount and your local tax rate, then see an instant breakdown of the pre-tax price, tax amount, and total. Use the reverse mode when a receipt shows the final price and you need to separate the tax portion.
The Formula
Tax = price × (rate ÷ 100) Total = price + Tax Pre-tax = total ÷ (1 + rate ÷ 100)
- Tax
- sales tax amount
- price
- pre-tax price
- rate
- tax rate (%)
- Total
- final price including tax
- Pre-tax
- pre-tax price (reverse calculation from tax-inclusive total)
Frequently Asked Questions
- How do I find my state's sales tax rate?
- Sales tax rates vary by state, county, and city. Check your state's Department of Revenue website for the current combined rate for your location.
- What is the reverse sales tax calculation?
- When a receipt shows the tax-inclusive total, you can back out the pre-tax price with pre-tax = total ÷ (1 + rate). This is useful for expense reports or comparing prices across tax jurisdictions.
- Does this calculator include state, county, and city taxes?
- The calculator applies a single rate you enter. To get the correct combined rate for your location, add the state rate plus any local (county or city) rates together and enter the sum.