Reverse Sales Tax Calculator

$0.63 + 13% tax= $0.56 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)$0.63

Tax Rate (%)13%

Tax Amount$0.07

Original Price (before tax)$0.56

Calculation Steps

Final price with tax: $0.63

Convert tax rate to decimal: 13% ÷ 100 = 0.130

Calculate divisor (1 + tax rate): 1 + 0.130 = 1.130

Divide final price by divisor: $0.63 ÷ 1.130 = $0.56

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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 $0.63 with 13% tax rate, divide $0.63 by (1 + 13/100) to get the original price of $0.56. The tax amount is $0.07.