Inputs
Example data
| Scenario | Revenue | Variable costs | Fixed costs | Units | Expected CM | Expected CM ratio |
|---|---|---|---|---|---|---|
| Standard offer | $25,000 | $14,500 | $6,000 | 500 | $10,500 | 42.00% |
| Discount push | $18,000 | $12,200 | $6,000 | 450 | $5,800 | 32.22% |
| Premium bundle | $33,000 | $16,500 | $6,000 | 550 | $16,500 | 50.00% |
Numbers are illustrative, not industry benchmarks.
Formula used
- Contribution margin (CM): CM = Revenue − Variable Costs
- Contribution margin ratio: CM Ratio = CM ÷ Revenue
- Contribution margin per unit: CM/Unit = Price/Unit − Variable Cost/Unit
- Break‑even units: Break‑even Units = Fixed Costs ÷ CM/Unit
- Break‑even sales: Break‑even Sales = Fixed Costs ÷ CM Ratio
- Profit after fixed costs: Profit = CM − Fixed Costs
How to use this calculator
- Enter either Sales revenue or Units sold plus Price per unit.
- Enter either Total variable costs or Units sold plus Variable cost per unit.
- Add Fixed costs if you want break‑even and profit after fixed.
- Click Calculate to view results above the form.
- Use Download CSV or Download PDF to export outputs.
FAQs
1) What does contribution margin tell me?
It shows how much revenue remains after variable costs. That remainder supports fixed costs and profit. Higher margins usually mean more pricing power or better cost control.
2) What costs are considered variable?
Variable costs change with volume. Examples include commissions, packaging, shipping per order, payment processing fees, and unit‑level materials. Mixed costs should be split into variable and fixed parts when possible.
3) Why is the margin ratio useful in sales planning?
The ratio converts margin into a percentage of revenue. It helps compare products of different prices and forecast profit impact when revenue changes, discounts apply, or channel mix shifts.
4) What if revenue is zero or very small?
A ratio needs revenue in the denominator. When revenue is zero, the ratio is undefined. With very small revenue, the ratio becomes unstable, so rely more on absolute margin and per‑unit figures.
5) How do I use break‑even units?
Break‑even units estimate the volume needed to cover fixed costs, assuming the per‑unit margin stays constant. Use it to set quotas, evaluate promotions, or test whether demand can realistically reach that level.
6) Can I calculate without units sold?
Yes. If you provide revenue and total variable costs, the calculator produces total margin and ratio. Units are only required for per‑unit margin and break‑even units.
7) What does a negative contribution margin mean?
It means variable costs exceed revenue. Each additional sale increases losses. Review pricing, variable expenses, refunds, and discounting. Negative per‑unit margin also makes break‑even volume impossible.
8) How can I improve contribution margin?
Common levers include raising prices, reducing discounts, cutting unit‑level costs, improving fulfillment efficiency, shifting to higher‑margin channels, and increasing average order value with bundles or upsells.