Margin
Calculator.
Fill any two of Cost, Margin %, Revenue, or Profit — the other two are computed instantly. Everything runs in your browser, nothing leaves the page.
What is profit margin?
Profit margin is the share of revenue left over after covering the cost of goods sold (COGS). It is the most common measure of a business's profitability per unit of revenue.
Profit = Revenue − Cost Margin = Profit ÷ Revenue × 100 Markup = Profit ÷ Cost × 100
Worked example
You buy a product for 100 and sell it for
150:
Profit = 150 − 100 = 50 Margin = 50 ÷ 150 × 100 = 33.33% Markup = 50 ÷ 100 × 100 = 50.00%
Margin vs. Markup
Margin is profit as a percentage of revenue; markup is profit as a percentage of cost. A 50% markup is only a 33.33% margin — they are not the same number.
Frequently asked questions
What does Margin Calculator do?
Gross margin, mark-up and revenue from cost + price. The whole thing runs in your browser tab, so it is ready the moment the page finishes loading.
Is Margin Calculator free to use?
Yes. Margin Calculator is completely free on ToolMunch — no trial, no premium tier holding back the main feature, and no daily or hourly cap on how many times you can use it.
Do I need to create an account or sign up?
No. There is no account, no email address, and no login. Open Margin Calculator, do the job, and take the result — nothing is gated behind a signup form.
Are the numbers I enter sent to a server?
No. Margin Calculator runs entirely inside your browser tab, so what you type never leaves your own device. Nothing is uploaded, which means there is no copy of it on a server to worry about.
Does Margin Calculator work on Mac, Windows, and phones?
Yes. Margin Calculator runs in any modern web browser on Windows, macOS, Linux, Chromebook, Android, and iOS. There is nothing to download or install.
Can I use it as many times as I want?
Yes. There is no queue, no per-hour quota, and no counter that runs out — run Margin Calculator as often as the work needs.