Sales Tax Reverse Calculator


Calculating sales tax can be a complex task, especially when you need to reverse the process to find the original amount before tax. This is where a Sales Tax Reverse Calculator comes in handy. In this article, we’ll guide you on how to use such a calculator, provide the accurate formula for the calculation, and offer a working HTML and JS code to implement a Sales Tax Reverse Calculator on your website.

How to Use

Using the Sales Tax Reverse Calculator is simple. Enter the total amount (including tax) and the tax rate into the provided input fields. Click the “Calculate” button, and the original amount before tax will be displayed.


The formula for calculating the original amount before tax is as follows:


Let’s consider an example. If the total amount is $115 with a tax rate of 15%, the original amount before tax can be calculated using the formula:

Calculating this gives us the original amount before tax.


  1. How do I use the Sales Tax Reverse Calculator?
    • Simply input the total amount and tax rate, then click the “Calculate” button.
  2. Is the formula provided accurate?
    • Yes, the formula is accurate for reverse sales tax calculations.
  3. Can I use this calculator for any currency?
    • Yes, the calculator is currency-agnostic; you can use it with any currency.
  4. What if my tax rate is in decimal form?
    • Input the tax rate as a percentage (e.g., 7% instead of 0.07).


The Sales Tax Reverse Calculator simplifies the process of finding the original amount before tax. By following the instructions and using the accurate formula provided, you can effortlessly handle reverse sales tax calculations. Feel free to integrate the provided HTML and JS code into your website for a seamless user experience.


  • Raees Mughal

    Meet Raees Mughal, a seasoned SEO author whose expertise lies at the intersection of compelling content and search engine optimization. With a passion for crafting engaging narratives and a keen understanding of the ever-evolving SEO landscape, Raees brings a unique blend of creativity and technical proficiency to the world of digital content. Raees Mughal has a proven track record of helping businesses enhance their online visibility and reach through strategic SEO-driven content. Whether it's creating keyword-rich articles, optimizing website copy, or developing content marketing strategies, Raees leverages his in-depth knowledge of SEO best practices to drive organic traffic and improve search engine rankings.

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