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Contribution Margin Calculator

Contribution margin per unit, total and ratio — what each sale contributes toward fixed costs and profit.

Enter values

Results update as you type.

Result

Contribution margin per unit

$32.00

Total contribution
$48,000.00
CM ratio
40%

About the Contribution Margin Calculator

Contribution margin per unit, total and ratio — what each sale contributes toward fixed costs and profit.

Also known as: cm ratio, unit contribution margin, contribution margin ratio.

How to use this calculator

  1. Enter price per unit, variable cost per unit, units sold.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

CM = price − variable cost

Worked example

Using the values pre-filled in the calculator above:

  • Price per unit = 80
  • Variable cost per unit = 48
  • Units sold = 1,500

the calculator returns:

  • Contribution margin per unit: 32
  • Total contribution: 48,000
  • CM ratio: 40%