Contribution Margin Calculator

Calculate contribution margin and contribution margin ratio for break-even and operating planning.

InputsChange a value to recalculate instantly

Sales revenue

Variable costs

ResultUpdates as you type

Contribution margin$4,000

Contribution margin ratio40.00%

Variable costs$6,000

FORMULA & STEPSContribution Margin Calculator — Mathematical Derivation & Steps

2 StepsSequential Calculation Breakdown

Subtract variable costs

Remove costs that vary with sales volume.

Calculate ratio

Express contribution margin as a share of sales.

λ DooMathWork with this calculation

Local · deterministic · optional

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Quick mathNatural-language-style shortcuts for deterministic arithmetic.

Calculator guide

How to use the Contribution Margin Calculator

Calculate contribution margin and contribution margin ratio for break-even and operating planning.

01Set inputsChoose values, units and assumptions.

02Apply the modelContribution margin = Sales − Variable costs. Ratio = Contribution margin ÷ Sales × 100.

03Read the resultCheck the output against the assumptions before using it.

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Subtract variable costs from sales to find the amount available to cover fixed costs.

functions

Contribution margin = Sales − Variable costs. Ratio = Contribution margin ÷ Sales × 100.

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