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πŸ“ˆ Contribution Margin Calculator

Enter sale price and variable cost to get contribution margin and its ratio β€” add units sold and fixed costs for total contribution margin and break-even volume.

Contribution Margin (per unit)
β€”
Contribution Margin Ratio β€” Total Contribution Margin β€” Break-Even Units β€”
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GUIDE

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01

Contribution Margin Formula (Standard Managerial Accounting)

Contribution margin is sale price minus variable cost β€” a standard managerial-accounting metric representing how much each sale contributes toward covering fixed costs and generating profit. CM per unit = Sale Price βˆ’ Variable Cost; CM ratio = CM per unit Γ· Sale Price. For example, with a sale price of $50 and variable cost of $30, CM per unit is 50 βˆ’ 30 = $20, and CM ratio is 20 Γ· 50 = 40%. Multiplying by 1,000 units sold gives a total contribution margin of 20 Γ— 1,000 = $20,000, the amount available before fixed costs are covered.

MetricFormulaExample ($50 price / $30 variable cost)
CM per unitSale Price βˆ’ Variable Cost50 βˆ’ 30 = 20
CM ratioCM per unit Γ· Sale Price20 Γ· 50 = 40%
02

Finding the Break-Even Point

When you enter fixed costs, Break-Even Units = Fixed Costs Γ· CM per unit gives the minimum sales volume needed to reach profitability. For example, with fixed costs of $10,000 and a CM per unit of $20, break-even volume is 10,000 Γ· 20 = 500 units β€” selling beyond that generates net profit above fixed costs. A higher CM ratio lowers the volume needed to break even, making this a key metric for pricing decisions and variable-cost-reduction strategy.

Frequently asked questions

Is contribution margin the same as gross/operating profit?
No. Contribution margin only subtracts variable costs, while operating profit subtracts both variable and fixed costs. Contribution margin is used specifically for break-even and pricing decisions.
What if the contribution margin ratio is negative?
It means variable cost exceeds sale price, so every unit sold increases losses. Pricing or cost structure needs immediate review.
Do I have to enter units sold or fixed costs?
No, both are optional. CM per unit and CM ratio only need sale price and variable cost; adding units sold computes total CM, and adding fixed costs computes the break-even volume.