Reverse Sales Tax Calculator

$100.00 + 22% tax= $81.97 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 (%)22%

Tax Amount$18.03

Original Price (before tax)$81.97

Calculation Steps

Final price with tax: $100.00

Convert tax rate to decimal: 22% ÷ 100 = 0.220

Calculate divisor (1 + tax rate): 1 + 0.220 = 1.220

Divide final price by divisor: $100.00 ÷ 1.220 = $81.97

Try Another Calculation →

Related Examples

Related Calculators

Explore our other helpful calculation tools

Percentage Calculator

Master percentage calculations with our intuitive calculator. Whether you need to find percentages for business analysis, academic work, or everyday calculations, get precise results instantly. Features step-by-step explanations and supports decimal precision for professional-grade accuracy.

Try now

Discount Calculator

Calculate discounts instantly with our smart calculator. Whether you're shopping for deals or running a sale, quickly determine the final price after any percentage discount. Perfect for retailers, shoppers, and business owners who want accurate discount calculations in seconds.

Try now

Percentage Change Calculator

Track value changes over time with our percentage change calculator. Ideal for analyzing price fluctuations, market trends, or growth rates. Get instant insights into how much values have increased or decreased, expressed as a clear percentage.

Try now

What Percent Calculator

This calculation helps consumers to determine the amount they will be able to save on a product or service, and to make informed decisions about whether or not to buy it.

Try now

What is As Percent Calculator

When you have a fraction, it represents a part of a whole. For example, the fraction 3/4 means that you have 3 parts out of a total of 4 equal parts. To convert this fraction to a percentage, you need to express it as a proportion of 100. This as percent calculator will save your time.

Try now

Accurate BMI Calculator

BMI (Body Mass Index) is a simple and universally applied method for assessing the weight status of adults internationally.

Try now

Sales Tax Calculator

Instantly calculate total prices including sales tax for any US state. Our calculator features up-to-date tax rates and lets you include local taxes for precise calculations. Perfect for businesses and consumers who need accurate total costs including all applicable taxes.

Try now

Zipcode Sales Tax Calculator

Simply enter your zipcode to instantly find local tax rates and calculate sales tax. Our calculator helps you determine exact tax amounts for any purchase in the US. Look up state and local tax rates by zipcode, calculate total costs including tax, and get accurate results in seconds.

Try now

Tips Calculator

Calculate tips for restaurants, delivery, bars, and more. Split bills among friends and get instant results.

Try now

CD Interest Calculator

Calculate your potential earnings from Certificate of Deposit investments. See how different interest rates, terms, and compounding frequencies affect your returns.

Try now

CPM Calculator

Calculate your Cost Per Mille (CPM), required impressions, or advertising budget. The perfect tool for all digital marketing campaigns.

Try now

State Mortgage Calculator

Choose your state to calculate monthly mortgage payments with accurate local property tax rates and insurance estimates.

Try now

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 22% tax rate, divide $100.00 by (1 + 22/100) to get the original price of $81.97. The tax amount is $18.03.