Marginal Revenue Calculator


To put things into perspective, let's imagine that you’re an eCommerce merchant and you currently sell thermos flasks. Let’s even go so far as to say that you’re one of the top sellers on the platform.

Currently, your sales are doing well but you’re looking to elevate it to the next level. To do so, you’re now looking at your operations to see what can be done. Focusing on just your top product, your business currently produces 1,000 of those flasks a month. From that, you’ve been able to generate $40,000 in revenue monthly—this translates to $40 per flask on average.

Based on tests from previous months, you know that your marginal cost is $50. This means that as things stand, your business is currently not producing enough and there are untapped profits. Creating a certain number of products would bring more in revenue than it would cost, so you’re trying to find that number. As such you are looking to increase your marginal revenue to $50.

In a bid to maximize your profits, you decide to produce an additional 250 units the next month to find your marginal revenue. And for that month, you managed to generate $52,500 in revenue.

To find your marginal revenue, the calculations are as follow:

  • Change in revenue (∆ revenue) = $12,250
  • Change in quantity (∆ quantity) = 250
  • Marginal Revenue for each unit sold = ∆ revenue ⁄∆ quantity = $50

As things stand, your marginal cost is equal to your marginal revenue. Based on calculations, this means that your business is currently maximizing its profits. This process usually takes some trial and error.

What is Marginal Revenue?

Revenue is the amount of money that a business brings in by selling its goods or services at a certain price. It is the starting point of a company's income statement that determines how much net income it makes after expenses, taxes, and interest are taken into consideration. As such, it is one of the most important line items for a business.

The marginal revenue definition is the additional income generated from selling one more unit of a good or service. It represents the change in total revenue that arises from an increase in sales volume.

Understanding marginal revenue is crucial for businesses as it helps in determining the optimal level of output and pricing strategies to maximize profits. Marginal revenue can vary depending on the market structure, pricing strategy, and the level of competition a business faces.

How to Calculate Marginal Revenue and Its Formulas

To calculate marginal revenue, you need to understand the change in total revenue from selling one additional unit. The formula for marginal revenue (MR) is:

The marginal revenue formula


  • △TR is the change in total revenue,
  • △Q is the change in quantity sold.

For instance, if a company’s total revenue increases from $1000 to $1200 when the quantity sold increases from 50 units to 60 units, the marginal revenue would be calculated as follows:


= (1200 - 1000) / (60 - 50)
= (200) / (10)
= $20

This means the marginal revenue for each additional unit sold is $20.

How to use Fairing’s Marginal Revenue Calculator

Our marginal revenue calculator makes finding your marginal revenue a simple task. Inside the calculator, there are 4 boxes to input your values: initial revenue, final revenue, initial quantity, and final quantity.

  1. Choosing what you’d like to calculate the marginal revenue for, find the numerical values so as to fill in the boxes.
  2. Once you have your values, input them into the calculator. This will help you get your change in revenue, and change in quantity respectively.
  3. Once you have them, the calculator will automatically help you calculate your marginal revenue.

Marginal Revenue vs. Total Revenue

Although revenue may be one number, there are many different ways to look at it. It has varying degrees of insight that are helpful to businesses, analysts, and investors.

Two of the most common forms of revenue are total revenue and marginal revenue. While total revenue represents the total amount of money earned by a business (sales multiplied by the prices of products and services), marginal revenue refers to the increase in revenue achieved by selling one additional unit of a product or service.

Total revenue is the overall income a company generates from selling its goods or services. It is calculated by multiplying the price per unit by the number of units sold:

The total revenue formula

Marginal revenue, on the other hand, focuses on the additional revenue from selling one more unit. While total revenue provides a broad view of a company’s income, marginal revenue gives insight into how revenue changes with each additional unit sold, which is critical for pricing and production decisions.

Marginal Revenue Vs Marginal Costs

When marginal cost equals marginal revenue, this means that your profit is maximized.

When marginal revenue is greater than marginal cost, that means creating one more product would bring more in revenue than it would cost, so profit would increase. When marginal revenue is less than your marginal cost, producing that last unit cost more than it brought in as revenue, so profit had decreased.

Law of Diminishing Marginal Returns

Marginal revenue adheres to the economic theory known as the law of diminishing returns.

The law of diminishing marginal returns states that as more units of a variable input (like labor) are added to fixed inputs (like machinery), the additional output generated by each additional unit of input will eventually decrease. This principle is crucial for understanding marginal revenue because it explains why marginal revenue decreases as output increases in the short run.

For example, a factory might initially see significant increases in production when additional workers are hired. However, as more workers are added, the factory becomes vercrowded, and the benefit of hiring additional workers diminishes, resulting in a lower marginal revenue per unit.

This can be visualized in a concave chart. The total revenue earned from aggregate unit production rises only to plateau once the optimal level of production is achieved. At some point, it may even start to fall, too. Since there is a positive correlation between these two types of revenue, total revenue drops when marginal revenue does.

Based on the law of diminishing marginal returns, companies need to find the right balance when it comes to the right production levels. Doing so can help them maintain both total and marginal revenue.

What is the difference between marginal cost and marginal revenue?

Marginal cost is the extra expense a business incurs when producing one additional product or service. Marginal revenue, on the other hand, is the incremental increase in revenue that a business experiences after producing one more product or service.

Adjustments to a company's marginal revenue may mark a change in its marginal cost. A company's production reaches its optimal point when marginal cost and revenue are equal.

How to Use Your Marginal Revenue Numbers for Your Business

Understanding and utilizing marginal revenue can greatly enhance business decision-making. Here are some ways businesses can use marginal revenue data:

  • Pricing Strategy: Determine the optimal price point where marginal revenue equals marginal cost (MR = MC) to maximize profit.
  • Production Decisions: Decide the level of output that maximizes profit by analyzing where marginal revenue intersects with marginal cost.
  • Marketing and Sales: Allocate resources to sales strategies that increase units sold up to the point where additional sales no longer generate significant revenue.
  • Financial Planning: Forecast revenue and plan for expansions or reductions in production based on marginal revenue trends.

Best Practices for Businesses

To effectively leverage marginal revenue in your business, consider the following best practices:

  • Regular Monitoring: Continuously track and analyze your marginal revenue to make timely adjustments to your pricing and production strategies.
  • Cost Management: Keep a close eye on your marginal costs to ensure they do not exceed marginal revenue.
  • Market Research: Stay informed about market conditions and competitor pricing to make informed decisions about your own pricing strategies.
  • Adaptability: Be flexible and ready to adjust your strategies based on changes in marginal revenue and market dynamics.
  • Customer Feedback: Use customer feedback to understand demand elasticity and adjust your output and pricing accordingly.

Marginal revenue is a vital concept in economics that helps businesses optimize their pricing and production strategies. By understanding and calculating marginal revenue, businesses can make informed decisions to maximize their profits. Implementing best practices and regularly monitoring marginal revenue can ensure sustained growth and financial health. Utilize Fairing’s Marginal Revenue Calculator to gain deeper insights into your revenue dynamics and drive your business toward success.

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