Profit Margin Calculator

What the Profit Margin Calculator Does

This tool takes what an item costs you and what you sell it for, and shows the profit in money plus two percentages that people constantly mix up: the margin and the markup. Seeing both side by side is the whole point.

It is the quick way to price a product correctly, or to translate between the two percentages — because aiming for a margin but applying a markup is a classic and expensive mistake.

How It Works

The tool subtracts the cost from the selling price to get the profit. It then expresses that profit two ways: as a margin, by dividing it by the selling price, and as a markup, by dividing it by the cost. Both are shown as percentages.

The difference comes entirely from the denominator. Margin divides by the larger number (the price), so it is always the smaller percentage; markup divides by the smaller number (the cost), so it is always larger. The same profit therefore gives two different percentages.

Methodology

1. Find the profit. Subtract the cost from the selling price.
2. Calculate the margin. Divide the profit by the selling price and multiply by 100.
3. Calculate the markup. Divide the profit by the cost and multiply by 100.
4. Show all three. Display the profit, the margin and the markup together.

Profit, margin and markup

Margin is on the selling price; markup is on the cost. Markup is always the larger number — a 50% markup is only a 33% margin. Confusing the two underprices your product.

Assumptions

• The cost you enter is the full cost of the item — typically the cost of goods. Overheads, operating costs and taxes not included in that figure are not part of this calculation.
• The selling price is taken before sales tax; tax collected on top is not your profit.
• Profit is simply price minus cost (gross profit per unit); it does not account for volume, fixed costs or discounts given.

Standards & references

• Profit margin — Profit as a percentage of the selling price: profit divided by price. Because the price is the larger figure, margin is always the smaller of the two percentages and can never exceed 100%.
• Markup — Profit as a percentage of the cost: profit divided by cost. Because the cost is smaller, markup is always larger than margin, and it can exceed 100%.
• Why they are confused — Both describe the same profit, so they sound interchangeable, but the base differs. A 50% markup equals a 33% margin. Targeting a margin while applying a markup leads to underpricing.

Accuracy & Limitations

Profit, margin and markup are computed exactly from the cost and price you enter, so the figures are precise for a single item.

Margin and markup are deliberately both shown because they are not the same. Margin is on the selling price and markup is on the cost, so for the same profit the markup is always the larger number — a difference that catches people out when pricing.

It calculates gross profit per unit. It does not include overheads, operating expenses, fixed costs, or the effect of selling volume, so it is a pricing figure rather than a full profit-and-loss result.

It assumes the price is before tax. Sales tax collected from the customer is not profit, so do not include it in the selling price, or the margin and markup will be overstated.

Real-World Use Cases

When to use it — and when not to

For net profit, factor in overheads, operating costs and tax separately. For how many units you must sell to cover fixed costs, use a break-even calculator. This tool gives per-unit gross profit, margin and markup.

Frequently Asked Questions

References

• Profit margin (Wikipedia)
• Markup (business) (Wikipedia)
• Gross margin (Wikipedia)

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