Reverse Sales Tax Calculator

$320.00 + 7% tax= $299.07 Original Price (before tax)

See exactly how we calculated the pre-tax price from your tax-inclusive amount. Our step-by-step breakdown shows the precise mathematics behind removing sales tax from a total price.

Quick Reference

Final Price (with tax)$320.00

Tax Rate (%)7%

Tax Amount$20.93

Original Price (before tax)$299.07

Calculation Steps

Final price with tax: $320.00

Convert tax rate to decimal: 7% ÷ 100 = 0.070

Calculate divisor (1 + tax rate): 1 + 0.070 = 1.070

Divide final price by divisor: $320.00 ÷ 1.070 = $299.07

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How It Works

To find the original price before tax, divide the tax-inclusive amount by (1 + tax rate as decimal). This calculator handles the math for you, showing each step of the process.

The Formula

Original Price = Final Price ÷ (1 + Tax Rate%/100)

Example Calculation

For a final price of $320.00 with 7% tax rate, divide $320.00 by (1 + 7/100) to get the original price of $299.07. The tax amount is $20.93.