Marginal Revenue Calculator

About this calculator

Marginal revenue is the change in total revenue that comes from selling one more unit: MR = ΔTotal Revenue ÷ ΔQuantity, calculated here from a before-and-after revenue and quantity pair. It's the revenue-side counterpart to marginal cost, and the two together define the classic MR = MC profit-maximizing output rule from microeconomics.

Economics students use this to work through textbook problems on firm behavior under different market structures, while business managers and pricing analysts use the same calculation on real sales data to judge whether pushing production or a promotion to sell one more unit is still worth it, or whether marginal revenue has already dropped below marginal cost.