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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.

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.

Contribution Margin 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%