Contribution Margin Calculator

How to Calculate Contribution Margin

Contribution margin measures how much revenue remains after covering variable costs. This amount is what contributes toward paying fixed costs and generating profit.

Contribution Margin Formulas

Contribution margin can be calculated per unit or as a total:

Why Contribution Margin Matters

Contribution margin tells you how much each unit or dollar of revenue contributes to covering fixed costs. Once fixed costs are covered, the contribution margin becomes profit. A higher CM ratio means more leverage from each sale — small increases in volume translate into large increases in profit.

Contribution Margin vs Gross Margin

Contribution margin subtracts only variable costs from revenue. Gross margin subtracts all cost of goods sold (COGS), which may include some fixed manufacturing costs like factory rent or equipment depreciation. Contribution margin is more useful for break-even analysis and pricing decisions because it isolates the costs that change with volume.

Using Contribution Margin for Pricing

Understanding your contribution margin helps set prices that cover both variable costs and a share of fixed costs. Products with higher CM ratios give your business more flexibility on pricing and greater profit potential per sale. Combine this analysis with our break-even calculator to see exactly how many units you need to sell, or use our markup calculator to set prices based on cost-plus pricing.