Free · Microeconomics calculators 💲

Incremental Unit Cost Calculator

Measure added cost per additional unit of output.

  • Formula & worked example
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Edit a calculated value to solve backwards, or lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Results are estimates for planning and education. Confirm rates, taxes, fees, and legal requirements with the relevant institution or a qualified professional before making a financial decision.

Formula and method

Divide the change in total cost by the change in output. A cost increase of 2,000 for 100 additional units gives 20 per additional unit over that interval.

Incremental cost per unit = change in total cost ÷ change in quantity

Worked example

Enter these known values and leave the other values blank.

Change in total cost
2000 USD
Change in quantity
100 units
Marginal cost
20 USD

Assumptions and limitations

  • Use values from a consistent period, scope and currency. The stated formula defines this simplified model; the explanation describes quantities it leaves out.

Common questions

Is this the cost of the very next unit?

The result averages the cost change across the quantity interval entered. A precise marginal cost at one point requires a cost function or more detailed production data.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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