Contribution Margin Calculator
Use the Contribution Margin Calculator for a transparent, instant calculation with validated inputs and cited sources. For a query such as “contribution margin”, enter the matching values and units below and review the stated assumptions.
How to use this calculator
Enter the requested values and units.
Review the assumptions and any warnings shown with the result.
Use the result together with the cited source and your real-world requirements.
Formula
Contribution margin = revenue − variable costs; contribution margin ratio = contribution margin ÷ revenue × 100%.
Worked example
Worked example: Inputs: Revenue: 100,000; Variable costs: 60,000. Outputs: Contribution margin: 40,000; Contribution margin ratio: 40 %.
Assumptions and limits
- The result depends on the values, units, and assumptions entered. It does not infer missing context.
Sources
- OpenStax, Rice University: Contribution Margin and Contribution Margin RatioReference material reviewed for the stated method, units, or domain. Confirm that its scope matches your use case. Reviewed 2026-08-14.
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Frequently asked questions
How does the Contribution Margin Calculator work?
Contribution margin = revenue − variable costs; contribution margin ratio = contribution margin ÷ revenue × 100%.
What should I enter?
Revenue, Variable costs
What should I verify?
Review the assumptions and any warnings shown with the result. The result depends on the values, units, and assumptions entered. It does not infer missing context.
Last updated 2026-08-14 · finance-contribution-margin-v1 · opportunity-content-2026-08-14 · Trusty Calculator Editorial Team