[Animations] Demand vs Quantity Demanded – Everyone Gets This Wrong!

By Nate McCallister   
Last Updated on July 12, 2021

Look, I have a degree in economics and it took me awhile to wrap my massive head around the difference between demand and quantity demanded. Now that I know the difference, I see the two being misused all the time. So, once and for all, here is the difference between demand and quantity demanded

Ceteris paribus assumption. For the concept of demand curves to work, economists rely on something called "ceteris paribus." It refers to the assumption that no other factors change. There are many factors that work simultaneously that can impact demand curves, but we review their impacts on their own as if there were not other factors at play. This is similar to "all things being equal."

Demand refers to the amount of a good or service that consumers are both willing and able to buy at given prices during a period of time. 

Shift in Demand Curve Animation

Quantity demanded is the amount of a good or service people will buy at a particular price at a particular time.

Quantity demanded curve GIF

The big difference, the quantity demanded refers to a specific price point whereas demand refers to the amount people are willing and able to buy plotted out over all price points. 

Demand is plotted on a graph as a line and quantity demanded is plotted on a graph as a single point. 

When we say that there has been a change in demand for a product or service, we mean that the whole demand curve has shifted inwards or outwards and that the units demanded at each price has increased or decreased simultaneously. 

When we say that the quantity demanded has changed, we mean that due to a change in the price of the product or service the number of units that consumers are willing to buy at the new price has changed.

For example, raising the price of a product from $7 to $10 will change the quantity demanded but will not reflect a change in demand.

About the author, Nate McCallister

Nate is the founder and main contributor of EntreResource.com and the author of Evergreen Affiliate Marketing. He is a lifestyle entrepreneur who spends his time building businesses and raising his four kids, Sawyer, Brooks, Van, and Lua, with his beautiful wife, Emily. His main interests include copywriting, economics, and piano.

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