📈 Profit Margin Calculator
Enter your cost and selling price to instantly see your profit, profit margin, and markup. Built for small businesses, freelancers, and anyone pricing a product.
Tool Overview
Profit margin is one of the most important numbers in any business, yet it is also one of the most commonly confused — especially the difference between margin and markup. This calculator removes that confusion by computing both at once from two simple inputs: your cost and your selling price. It instantly shows your profit in dollars, your profit margin as a percentage of revenue, and your markup as a percentage of cost, so you can price products and services with confidence.
How to Use This Calculator
- Step 1 — Enter your values into the calculator fields above.
- Step 2 — Results update instantly as you type — no button to press.
- Step 3 — Adjust any input to explore different scenarios.
- Step 4 — Use the results to inform your pricing, planning, or decision.
The Formulas Behind the Calculator
The calculator uses three straightforward formulas. Profit is simply revenue minus cost. Profit margin is profit divided by revenue, expressed as a percentage — it answers the question “what portion of my selling price is profit?” Markup is profit divided by cost, expressed as a percentage — it answers “how much did I add on top of my cost?” The crucial insight is that margin and markup are different numbers for the same sale, because one divides by revenue and the other by cost. A product costing $40 and selling for $100 has a 60% margin but a 150% markup, and confusing the two is a frequent, costly pricing error.
Worked Examples
Retail product
You buy an item for $40 and sell it for $100. Profit is $60, margin is 60% ($60 / $100), and markup is 150% ($60 / $40). Knowing both lets you communicate clearly with suppliers (who often talk markup) and investors (who often talk margin).
Service business
A consultant's cost to deliver a project — their time and tools — is $2,000, and they charge $5,000. Profit is $3,000, a 60% margin and a 150% markup. Tracking margin across projects reveals which kinds of work are genuinely profitable.
Setting a target price
You know an item costs $30 and you want a 40% margin. Because margin divides by revenue, you cannot simply add 40% to cost. Instead, divide cost by (1 minus the margin): $30 / 0.60 = $50 selling price. This is exactly the kind of mistake the calculator helps you avoid.
Real-World Scenarios
Small business owners use margin to decide whether a product line is worth keeping, since a high sales volume at a thin margin can earn less than modest sales at a healthy one. Freelancers use it to price projects so that their effective profit covers not just their time but their tools, software, and unbilled hours. Retailers use markup when negotiating with suppliers and margin when reporting to stakeholders. In every case, seeing margin and markup side by side prevents the classic trap of setting a price by adding a markup percentage and then being surprised that the resulting margin is far lower than expected.
Common Mistakes to Avoid
- Confusing margin with markup — they are different percentages for the same sale, and mixing them up leads to underpricing.
- Adding a desired margin percentage directly to cost; to hit a target margin you must divide cost by one minus the margin, not multiply.
- Forgetting to include all costs — a true cost figure includes materials, labor, fees, and overhead, not just the obvious purchase price.
- Chasing high volume at razor-thin margins without checking whether total profit actually exceeds a lower-volume, higher-margin approach.
Frequently Asked Questions
What is the difference between margin and markup?
Margin is profit as a percentage of the selling price, while markup is profit as a percentage of cost. For the same sale, markup is always the larger number. A $40 item sold for $100 has a 60% margin but a 150% markup. Confusing the two is the most common pricing mistake.
How do I calculate a selling price for a target margin?
Divide your cost by one minus the target margin expressed as a decimal. For a 40% margin on a $30 cost, divide $30 by 0.60 to get a $50 selling price. You cannot simply add the margin percentage to the cost, because margin is measured against revenue, not cost.
What is a good profit margin?
It varies enormously by industry — grocery retail runs on thin margins of a few percent, while software can exceed 80%. Compare your margin to others in your specific industry rather than to a universal benchmark. The right margin is one that covers all your costs and leaves sustainable profit.
Does this calculator account for taxes?
No. It calculates gross profit margin from cost and revenue, which is the standard metric for pricing decisions. Taxes, and other operating expenses not included in your cost figure, affect net profit separately and depend on your specific situation.
Methodology & Accuracy
This calculator computes gross profit margin and markup using the standard accounting definitions: profit equals revenue minus cost, margin equals profit divided by revenue, and markup equals profit divided by cost. All calculation happens instantly in your browser with no data sent anywhere. The figures are only as accurate as the cost you enter, so for meaningful results include every cost associated with the product or service — materials, labor, fees, and a fair share of overhead — rather than just the headline purchase price.
Why You Can Trust This Tool
Everything runs locally in your browser, so your figures are never uploaded or stored. The page loads over HTTPS, needs no permissions or downloads, and gives consistent, reliable results every time — free, with no signup and no limits.