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Markup & Discount Calculator

Percent increase, percent change & percent off calculations

For all percentage increase (markup) and percent off (discount) calculations, there are five possible variables. You may not always need them, and you may not even be aware of them, but they are always present. Do not let this discourage you. The user provides values for only two of the five, and the calculator computes the remaining three. More below…

The Calculator-Calculate Markup and Discount


Required user inputs and results for the markup and discount calculator.
Enter non-zero values for any two of the five inputs.
Enter a “0” (zero) for three unknown values.
At least one of the percentages must be zero.
Click the [Help] button for more details.
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Note: Whether you enter a markup percentage or a discount percentage, the calculator always computes the other. A user cannot provide both. The results must stay consistent. A 10% increase always equals 9.0909…% off. That relationship does not change.

Percentage Increase Calculator

To calculate a specific percentage increase, enter these values:

  • Enter “Net Amount.”
  • Enter “Percent Increase (markup).”
  • Set the other three inputs to 0.

To determine what percentage an increase represents, use one of the following setups:

  • Enter 0 for “Percent Increase (markup).”
  • Enter the “Net Amount.”
  • Enter either “Amount Added/Subtracted” or “Gross Amount.”
  • Set the remaining inputs to 0.
percentage increase
Percentage increase calculation setup.

Percentage Off Calculator

To calculate a specific percent off, enter these values:

  • Enter “Gross Amount.”
  • Enter “Percent Off (discount).”
  • Set the other three inputs to 0.

To determine what percent off a discount represents, use one of the following setups:

  • Enter 0 for “Percent Off (discount).”
  • Enter the “Gross Amount.”
  • Enter either “Amount Added/Subtracted” or “Net Amount.”
  • Set the remaining inputs to 0.

Percentage Change Calculator

Implied Percentage

Percent increase and percent off are both percentage change calculations. The examples above use the traditional approach. For a percentage increase, you begin with a net amount and increase it by a percentage or an amount to get the gross amount. For a percentage off, you start with a gross amount and subtract either a percentage or an amount.

percentage change calculator
Markup and discounts are the two percentage change calculations.

These are conventional examples. This calculator also lets you enter what is usually the implied percentage in those examples, and it will compute the percentage that is normally provided.

What does this mean?

Here is the explanation.

Consider a percentage increase. Instead of providing a “Net Amount” and an “Amount Added/Subtracted,” you may enter the “Gross Amount” in place of the “Net Amount,” and the calculator will still compute the “Percent Increase (markup).”

What is the benefit?

This capability allows you to calculate a percent change from the reverse of the usual direction.

For example, if you buy items for resale and want a 30% markup, enter the “Gross Amount,” such as $49.95, and the “Percent Increase (markup)” of 30%. The calculator will determine the maximum price you can pay and still achieve the desired markup.

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