Reverse Sales Tax Calculator

$31.25 + 5% tax= $29.76 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)$31.25

Tax Rate (%)5%

Tax Amount$1.49

Original Price (before tax)$29.76

Calculation Steps

Final price with tax: $31.25

Convert tax rate to decimal: 5% ÷ 100 = 0.050

Calculate divisor (1 + tax rate): 1 + 0.050 = 1.050

Divide final price by divisor: $31.25 ÷ 1.050 = $29.76

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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 $31.25 with 5% tax rate, divide $31.25 by (1 + 5/100) to get the original price of $29.76. The tax amount is $1.49.