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For all percentage increase (markup) and percent off (discount) calculations there are five potential variables. You may not always care about them, and in fact, you may not even be aware of them, but they are nonetheless there. Don't let this be off-putting. The user needs only provide values for two of the five, and the calculator will calculate the other three. More below...»

Enter non-zero values for any two of the five inputs.
Enter "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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Whether you explicitly calculate a markup or a discount the other percentage is always implied (calculated). This is why a user can't enter both percentages. The results need to be kept in sync. A 10% increase is always 9.0909% off. That fact never changes.

Percentage Increase Calculator

To calculate a particular percentage increase, the user enters these two values

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

To figure out what percentage an increase is, the user has these options

  • Enter 0 for "Percent Increase (markup)."
  • Enter the "Net Amount."
  • And enter either "Amount Added/Subtracted" or "Gross Amount."
  • Set the other inputs to 0.
percentage increase
Percentage increase calculation setup.

Percent Off Calculator

To calculate a particular percent off, the user enters these two values

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

To figure out what percent off a discount is, the user has these options

  • Enter 0 for "Percent Off (discount)."
  • Enter the "Gross Amount."
  • And enter either "Amount Added/Subtracted" or "Net Amount."
  • Set the other inputs to 0.

Percent Change Calculator

The percent increase and percent off are percent change calculations. And they have been presented above in the classic way. For a percentage increase start with a net amount and increase it by a given percent or amount to find the gross amount. The same can be said about the percentage off example. We started with a gross amount an deducted either an amount or a percentage.

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

These are traditional examples. But this calculator allows the user to provide what is normally the implied percentage in the traditional example and the calculator will calculate the percentage that the user usually provides.

What does this mean?

I'll tell you.

Take a percent increase calculation. Rather than provide a "Net Amount" and "Amount Added/Subtracted", the user can provide the "Gross Amount" instead of the "Net Amount" and the calculator will still calculate the "Percent Increase (markup)."

What is the benefit of this?

Well, there are several uses for being able to calculate a percent change from the reverse of the traditional perspective. If, for example, you are somone who purchases items for resale and you know a product can sell for say $49.95 and you want to make a 30% markup, by entering the "Gross Amount" and the "Percent Increase (markup)", the calculator will calculate the amount you have to purchase the product for to make your markup.

Related - Interested in a more thorough discussion covering percents, ratios, and fractions? Then see this Percentage Calculators page.

6 thoughts on “markup-and-discount-calculator

  1. Thanks, great calculator

  2. I’m glad to see there is now a place for a comment. I’ve used this calculator for several years, finding it very helpful for my business. Thank you for providing it.

  3. why discount is grossed up? as it should have been directly multiplied by discount percentage divided by 100 need your support

    • Could you provide a bit more detail please? What 2 inputs did you provide and which calculated number do you think is wrong and what value are you expecting?

  4. Have a question about discount and when the discount percent is 100. So lets say, Net Amount?: 100
    Discount Percentage?: 100
    right now it crashes, but what would the value be if it didnt throw a divide by 0 error

    • The answer the calculator is giving you is correct, though I guess it could be formatted better. It is infinite. Same problem, but the discount is 99.9999%, the gross amount is $100,000,000.00

      A 100% discount means the net amount is 0.

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