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econ.marginal-revenue-cost Calculator
Calculates marginal revenue and marginal cost from total revenue/cost at two output levels, and identifies the profit-maximising output where MR = MC. Every introductory economics course covers MR = MC as the core profit-maximisation condition — this makes the arithmetic concrete.
Inputs
Q
Count or number of items involved.
Price Per Unit
Reference formula or conversion factor shown for context.
Fixed Costs
Costs that do not change with output — rent, salaries, insurance. These are paid regardless of how much you produce.
Variable Cost Per Unit
Costs that scale with production volume. Reducing variable cost per unit directly improves margins.
Results
profit
Revenue minus all costs -- the net gain from the activity.
total revenue
The combined total across all inputs and components.
total cost
The combined total across all inputs and components.
MR = MC?
Reference formula or conversion factor shown for context.
break-even quantity
The price, quantity, or time at which total revenue equals total cost — neither profit nor loss.