Contribution per Unit Calculator
Contribution per unit is selling price minus variable cost per unit and indicates the amount available to cover fixed costs and profit.
How to use this calculator
- Enter a positive selling price and non-negative variable cost.
- Confirm that all inputs use the stated units and the same population, period or scope.
- Change one assumption at a time when comparing scenarios.
Formula used by the contribution per unit calculator
Contribution = unit price − unit variable cost
- Contribution = unit price − unit variable cost
- Fixed costs and other costs not classified as variable are not deducted.
- Inputs are validated against required ranges and outputs are rounded for readability.
Worked examples
Worked example
Price 45 and variable cost 27.
Contribution is 18 per unit, a 40% contribution margin.
Contribution is 18 per unit, a 40% contribution margin.
Understanding the result
Contribution per unit is selling price minus variable cost per unit and indicates the amount available to cover fixed costs and profit.
Fixed costs and other costs not classified as variable are not deducted.
Important notes
Fixed costs and other costs not classified as variable are not deducted.
Use the result as a calculation aid for the inputs supplied; confirm critical specifications independently.
Frequently asked questions
Can contribution be negative?
Yes, if variable cost exceeds selling price; that signals each unit adds to the deficit before fixed costs.
Is contribution margin the same as gross margin?
Definitions vary by accounting context; compare the included cost categories.
How do I use this calculator?
Enter a positive selling price and non-negative variable cost.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
- How to Calculate Break-Even Point — Learn the break-even formula for units and revenue and understand fixed costs, price, and variable costs.
- How to Calculate Future Value — Learn the future value formula and how growth, contributions, rates, and time affect a projected balance.
- Break-Even Point — Understand break-even point, contribution margin, and the basic unit break-even formula.
This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.