Contribution Margin Calculator
Find contribution margin per unit and ratio.
Contribution margin is what each sale contributes toward fixed costs and profit.
How the Math Works
The contribution margin calculation is elegantly simple yet powerful. When you subtract a product's variable cost from its selling price, you isolate the amount that 'contributes' to covering fixed costs and generating profit. This per-unit contribution represents the financial fuel each sale adds to your business engine. The contribution margin ratio then expresses this as a percentage of revenue, showing what portion of every dollar earned goes toward fixed costs and profit rather than variable expenses.
Practical Applications
To apply this calculation practically, first determine your product's selling price and identify all variable costs—including materials, direct labor, and portion of shipping or commissions. For example, if a widget sells for $50 and has $30 in variable costs, the contribution margin is $20 per unit, or 40% of revenue. Managers use these figures to set pricing strategies, evaluate product viability, and make decisions about expansion or discontinuation by comparing contribution margins across different product lines.
Day-to-Day Use
Understanding contribution margin helps you make smarter purchasing and pricing decisions in everyday business. Whether you're running a lemonade stand, planning a wedding budget, or evaluating a side hustle, this calculation reveals which products or services are truly profitable. It answers critical questions like 'Should I offer a bulk discount?' or 'Is this expensive ingredient worth including?' By seeing how each sale contributes to your bottom line, you can optimize your offerings, eliminate money-losing ventures, and allocate resources more effectively toward what makes the most financial sense.
Worked example
$50 price, $30 variable → $20 (40%).
FAQ
Use?
Break-even analysis and pricing decisions.