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Marginal Cost Calculator
Find out how much it costs to produce one additional unit of output.
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What is marginal cost?
Marginal cost is the additional cost incurred to produce one more unit of a good or service. It helps businesses decide whether producing more units still makes financial sense.
How this calculator works
Enter the total cost and quantity produced at two different production levels. The calculator finds the change in total cost divided by the change in quantity, giving the average marginal cost per additional unit over that range.
Marginal cost can change as production scales up or down due to factors like economies of scale or capacity limits, so this result reflects the specific range entered. For general business and economics planning purposes.
Last reviewed August 2026