Gross Profit Margin Calculator

Abount GPMC

GPMC is a progressive web application for calculating on-the-fly profit margin based sales figures to help keep your gross profit margin in check. GPMC was developed using responsive web design technologies for seamless use on both desktop and mobile devices.

Gross Profit Margin is the percentage of revenue remaining after factoring the cost of goods sold. The formula for calculating Gross Profit Margin is (Sales Revenue - Cost of Goods Sold) / Sales Revenue.

Numeric Inputs

Numeric Keypad

Looking for the legacy Windows 32bit 'Gross Profit Margin Calculator'? You can find the legacy GPMC Windows 32bit application here.

Calculator Help

The first step is to set the desired profit margin. The default is 25%. There are three ways to set the margin. Click or tap the 'Margin' input field or select the 'M' key on the numeric keypad or 'Margin' from the menu in the upper right hand corner.

Once you have the desired margin inputed click or tap the 'Amount' input field or select 'A' on the numeric keypad or 'Amount' from the menu to activate the Amount input field. The margin will be set to this value the next time you use the calculator.

You're now ready to start calculating margin based sales figures by inputing the costs of goods sold in the 'Amount' field using the numeric keypad or your keyboard.

Numeric Keypad Legend

0 to 9 Numeric input

. Decimal place input

< Backspace

A Amount input field selection

M Margin input field selection

C Clear calculator

Frequently Asked Questions

Q: On a 100.00 amount with a 25% profit margin I was expecting a 25.00 profit, why is the profit 33.33?
A: You're confusing profit margin with markup. Markup and profit margin use different accounting formulas to establish profit from the costs of goods sold.
GPMC Web Edition v1.2
David B. Ferguson <>
Last Updated: