Profit margin and markup calculator

Calculate gross profit, markup based on cost, and gross margin based on selling price.

Your inputs stay in your browser.

Method and assumptions

Method version 1.0.0 · Updated October 2, 2026

Calculate margin

Formula: Profit = selling price − cost; markup = profit ÷ cost; gross margin = profit ÷ selling price.

Both amounts must use the same currency. Fees, taxes and currency conversion are not included.

cost: Cost
salePrice: Selling price

Enter cost and selling price in the same currency. Markup is profit divided by cost; gross margin is profit divided by selling price. Results are rounded to two decimal places for display. A loss-making sale is allowed.

Calculate with code

These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.

JavaScript

const salePrice = 50, cost = 30;
const profit = salePrice - cost;
console.log(profit, profit / cost * 100, profit / salePrice * 100); // 20, 66.67% margin, 40% markup

TypeScript

const salePrice = 50, cost = 30;
const profit = salePrice - cost;
console.log(profit, profit / cost * 100, profit / salePrice * 100); // 20, 66.67%, 40%

Python

sale, cost = 50, 30
profit = sale - cost
print(profit, profit / cost * 100, profit / sale * 100)  # 20, 66.67, 40

Java

double sale = 50, cost = 30, profit = sale - cost;
System.out.printf("%.0f %.2f%% %.0f%%%n", profit, profit / cost * 100, profit / sale * 100); // 20 66.67% 40%

decimal sale = 50, cost = 30, profit = sale - cost;
Console.WriteLine($"{profit} {profit / cost * 100:F2}% {profit / sale * 100}%"); // 20 66.67% 40%