Marginal Revenue Calculator
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The Marginal Revenue Calculator computes the additional revenue generated by selling one extra unit of a product or service. Marginal revenue measures top-line financial expansion relative to sales volume growth.
Comparing Marginal Revenue (MR) against Marginal Cost (MC) enables companies to determine their exact profit-maximizing sales volume. If MR exceeds MC, producing and selling additional units increases overall corporate profit.
Marginal Revenue (MR) Formula
Marginal Revenue is calculated by dividing the change in total sales revenue by the change in total unit sales volume:
Marginal Revenue (MR) = Change in Total Revenue / Change in Quantity Sold
Where:
Change in Total Revenue = Total Revenue (New Output) - Total Revenue (Initial Output)
Change in Quantity Sold = Quantity (New Output) - Quantity (Initial Output)
Marginal Revenue & Market Structure Matrix
How Marginal Revenue behaves depends on the competitive structure of your market industry:
| Market Structure | MR vs. Selling Price Relationship | Pricing Power & Revenue Dynamics |
|---|---|---|
| Perfect Competition | MR = Price | Price takers. Selling additional units does not force a price reduction. Marginal revenue remains constant at market price. |
| Monopolistic Competition | MR < Price | Differentiated products. To sell higher volume, sellers must slightly lower prices, reducing MR below current unit price. |
| Monopoly | MR << Price (Rapid Decline) | Single seller faces downward-sloping market demand curve. Price cuts required for extra sales apply to all existing units sold. |
Step-by-Step Calculation Example
Consider a specialized software provider reviewing price tier tests:
- Initial Sales: 50 software licenses @ $100/license → Total Revenue: $5,000
- Discounted Sales: 60 software licenses @ $95/license → Total Revenue: $5,700
Step 1: Compute Change in Total Revenue
Change in Revenue = $5,700 - $5,000 = $700
Step 2: Compute Change in Quantity Sold
Change in Quantity = 60 - 50 = 10 licenses
Step 3: Divide Change in Revenue by Change in Quantity
Marginal Revenue (MR) = $700 / 10 = $70 per additional license
Result: Selling 10 additional licenses yields a Marginal Revenue of $70 per license. Even though the price tag was $95, price reductions across all licenses lowered incremental revenue per unit to $70.
Frequently Asked Questions (FAQ)
What is the Profit Maximization Rule?
The profit maximization rule states that a business maximizes net profit by producing at the exact volume where Marginal Revenue (MR) equals Marginal Cost (MC).
Why is Marginal Revenue less than Price in non-competitive markets?
In non-competitive markets, a firm must lower prices to sell additional units. Because that lower price applies to all units sold (not just the last one), total revenue increases by less than the price of the extra unit.
Can Marginal Revenue be zero or negative?
Yes. If price cuts required to sell additional units cause total revenue to decline, Marginal Revenue becomes negative. When MR is zero, total revenue is maximized.
How does price elasticity affect Marginal Revenue?
When demand is price elastic (PED > 1), lowering prices increases total revenue (MR > 0). When demand is inelastic (PED < 1), lowering prices decreases total revenue (MR < 0).