Gross Profit & Margin

What the Gross Profit Calculator Does

This Gross Profit Calculator turns two numbers — your revenue and your cost of goods sold (COGS) — into your gross profit in currency and your gross margin as a percentage. Enter the price you charged and what the item or service cost you to deliver, and the tool returns both figures instantly.

It's built for small business owners, freelancers, e-commerce sellers, retailers, and students who need a quick read on whether a product or order makes money before overhead. It is not a net profit tool: it stops at the production line and ignores rent, salaries, marketing, interest, and taxes.

How It Works: The Gross Profit and Gross Margin Formulas

The math behind gross profit is simple subtraction, and gross margin is a ratio of that result to revenue:

The margin is then multiplied by 100 to express it as a percentage. Gross margin always sits between 0% and 100% for a profitable sale — a negative result means you sold below cost.

• Gross profit = Revenue − Cost of goods sold (COGS)
• Gross margin (%) = (Gross profit ÷ Revenue) × 100
• COGS = direct costs only (materials, manufacturing, the wholesale price you paid, direct labor)

Worked Example With Real Numbers

Say you run an online shop and sell a backpack for $80. You bought it from a supplier for $45, and shipping plus packaging to fulfill the order cost another $7. Your COGS is $45 + $7 = $52.

Gross profit = $80 − $52 = $28. Gross margin = ($28 ÷ $80) × 100 = 35%. So 35 cents of every dollar of sales is left to cover everything else — your rent, ads, and salary all come out of that $28, not the full $80.

If you sold 200 of these in a month, total gross profit would be 200 × $28 = $5,600, while the margin percentage stays at 35%.

Gross Margin vs. Markup: A Common Mistake

Margin and markup use the same dollars but different denominators, and confusing them leads to underpricing. Margin divides profit by the selling price; markup divides profit by the cost.

In the backpack example, the margin is 35% ($28 ÷ $80), but the markup is $28 ÷ $52 = 53.8%. The markup number is always higher than the margin for the same sale, so if a wholesaler quotes you a "50% markup," don't assume it means a 50% margin.

Practical Tips and Factors That Affect Your Result

Accurate COGS is everything. The most frequent error is leaving direct costs out — payment-processor fees, freight, returns, or per-unit labor — which inflates your apparent margin. Be consistent about what you include so you can compare products fairly over time.

• Include only direct, per-sale costs in COGS; keep fixed overhead (rent, software, salaries) out — that belongs to net profit.
• Rising supplier prices or shipping rates shrink margin even when your selling price stays flat.
• Discounts and coupons reduce revenue, so a 20% off code cuts your margin faster than it cuts your price.
• Compare gross margins within the same industry — software margins differ sharply from grocery margins, so there's no single "good" number.
• Use gross margin to set a price floor: if margin can't cover your overhead per unit, the product loses money overall.