Reverse Sales Tax Calculator

$100.00 + 7% tax= $93.46 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)$100.00

Tax Rate (%)7%

Tax Amount$6.54

Original Price (before tax)$93.46

Calculation Steps

Final price with tax: $100.00

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

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

Divide final price by divisor: $100.00 ÷ 1.070 = $93.46

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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 $100.00 with 7% tax rate, divide $100.00 by (1 + 7/100) to get the original price of $93.46. The tax amount is $6.54.