Demand Schedule: Definition, Examples, and How to Graph One
By Markets & Investing DeskUpdated Nov 10, 2026
Definition
A demand schedule is a table showing how much of a good buyers are willing and able to purchase at each price over a set period, with all other influences on demand held constant.
Key takeaways
- A usable schedule states the good, its unit and the time period, since quantity demanded is a flow.
- A market demand schedule adds each buyer's quantity at every price, a process called horizontal summation.
- A change in the product's own price moves along the curve, while income or tastes shift the entire curve.
- In the coffee example, demand meets supply at $3 and 9 cups, the equilibrium price and quantity.
A demand schedule is a table that lists the quantity of a good or service buyers are willing and able to purchase at each of several prices, over a stated period, with every other influence on demand held constant. It is the numerical form of the demand relationship. Plot its price and quantity pairs on a graph and you get a demand curve. Combine it with a supply schedule and you can find the price at which a market clears.
What a Demand Schedule Contains
Most demand schedules have two columns. The first lists prices, arranged in ascending or descending order. The second lists the quantity demanded at each of those prices. A schedule can carry extra columns, for example one quantity column per buyer or per region, but the basic structure is always a price paired with a quantity.
Three details turn a list of numbers into a usable schedule:
- The good and its unit. “Cups of coffee per week” and “40-inch televisions per quarter” are measurable. “Coffee” alone is not.
- The time period. Quantity demanded is a flow. Twenty units a day and twenty units a year describe very different demand, so the period has to be stated.
- The ceteris paribus condition. Every row assumes that only price differs. Buyer income, preferences, the prices of substitutes and complements, expectations and the number of buyers are fixed at their current levels.
In a typical schedule, quantity demanded falls as price rises. This inverse relationship is the law of demand. At higher prices some buyers drop out and others buy less, partly because they switch to alternatives (the substitution effect) and partly because a higher price shrinks what their income can buy (the income effect).
Where the numbers come from depends on who builds the schedule. Economics textbooks use invented figures to illustrate the concept. Companies estimate theirs from market research, consumer surveys, price tests and historical sales data.
Individual vs. Market Demand Schedule
An individual demand schedule shows how much one consumer would buy at each price. A market demand schedule shows how much all consumers in a market would buy at each price. To build the market schedule, you add the individual quantities at each price. On a graph this is called horizontal summation, because you add quantities (the horizontal axis) while holding price (the vertical axis) fixed.
Hypothetical example: a small market for coffee has three buyers. Their weekly demand looks like this:
| Price per cup | Ana | Ben | Cara | Market demand |
|---|---|---|---|---|
| $5 | 1 | 0 | 2 | 3 |
| $4 | 2 | 1 | 3 | 6 |
| $3 | 3 | 2 | 4 | 9 |
| $2 | 4 | 4 | 5 | 13 |
| $1 | 5 | 6 | 6 | 17 |
At $4, Ana buys 2 cups, Ben 1 and Cara 3, so market demand is 6 cups. Repeat the addition for each row and you have the market demand schedule. Notice that Ben buys nothing at $5. A buyer who drops out at high prices still counts as zero in the sum, which is one reason market demand tends to respond more smoothly to price than any one person’s demand does.
How to Graph a Demand Schedule
To graph a demand schedule:
- Draw the axes. Put price on the vertical (Y) axis and quantity demanded on the horizontal (X) axis. Label the units and time period.
- Choose scales that cover the full range of the schedule, from the lowest to the highest price and from the smallest to the largest quantity.
- Plot each row as a point. Using the market column above, the points are (3, $5), (6, $4), (9, $3), (13, $2) and (17, $1).
- Connect the points. The resulting line is the demand curve. For a typical good it runs from the upper left to the lower right: high prices go with low quantities and low prices with high quantities.
- Label the curve “D” so it can be distinguished from a supply curve on the same chart.
Placing price on the vertical axis is a convention, even though price is usually treated as the independent variable.
The schedule and the curve hold the same information in different forms. A schedule gives exact values only at the listed prices. A curve lets you read approximate quantities between them, on the assumption that demand changes smoothly from one listed price to the next.
Movement Along the Curve vs. a Shift in Demand
A change in the product’s own price moves you from one row of the schedule to another, which is a movement along the existing curve, called a change in quantity demanded. A change in anything else produces a new schedule with different quantities at every price, which shifts the entire curve. That is a change in demand.
The non-price factors that shift a demand schedule include:
- Income. For normal goods, higher disposable income raises the quantity demanded at each price. For inferior goods, it lowers it.
- Prices of substitutes. If a rival brand of coffeemaker becomes more expensive, demand for a cheaper competing model can rise.
- Prices of complements. If coffeemakers fall in price and more people buy them, demand for coffee itself can rise.
- Tastes and preferences, including the effect of advertising and changes in product quality.
- Expectations about future prices or income.
- The number of buyers in the market.
- Outside conditions such as weather or seasonal patterns.
Hypothetical example: suppose a rise in local wages leads each of the three coffee buyers to want one extra cup per week at every price. The new market schedule adds 3 cups to every row: 6 at $5, 9 at $4, 12 at $3, 16 at $2 and 20 at $1. Graphed, the new curve sits to the right of the old one. Building a revised schedule always works this way: apply the change to the quantity at each price, then re-sum if you are working with a market schedule.
Demand Schedule vs. Supply Schedule
A supply schedule is the mirror image of a demand schedule. It shows the quantity producers are willing to offer at each price. Because higher prices make production more profitable, quantity supplied usually rises with price, and the supply curve slopes upward from lower left to upper right.
Putting both schedules side by side shows where the market settles. Hypothetical example using the original coffee market:
| Price | Quantity demanded | Quantity supplied | Result |
|---|---|---|---|
| $5 | 3 | 15 | Surplus of 12 |
| $4 | 6 | 12 | Surplus of 6 |
| $3 | 9 | 9 | Equilibrium |
| $2 | 13 | 6 | Shortage of 7 |
| $1 | 17 | 3 | Shortage of 14 |
At $3 the quantity buyers want equals the quantity sellers offer. That is the equilibrium price, and 9 cups is the equilibrium quantity. On a graph, it is the point where the demand and supply curves intersect. Above $3, unsold supply puts downward pressure on price. Below $3, buyers compete for scarce output and push price up. The equilibrium holds only while all other factors stay equal. If demand shifts, as in the wage example, the intersection moves to a new price and quantity.
| Demand schedule | Supply schedule | |
|---|---|---|
| Records | Quantity buyers want at each price | Quantity sellers offer at each price |
| Typical direction | Quantity falls as price rises | Quantity rises as price rises |
| Curve shape | Downward sloping | Upward sloping |
| Main shifters | Income, tastes, related goods, expectations, number of buyers | Input costs, technology, number of sellers, expectations |
Reading Price Elasticity From a Schedule
Because a demand schedule records how quantity responds to price, it is the raw material for measuring price elasticity of demand: the percentage change in quantity demanded divided by the percentage change in price. A common version, the midpoint method, uses averages so the result is the same whether price rises or falls:
Elasticity = [(Q2 − Q1) ÷ ((Q1 + Q2) ÷ 2)] ÷ [(P2 − P1) ÷ ((P1 + P2) ÷ 2)]
Applying it to the coffee market schedule:
- From $5 to $4: quantity goes from 3 to 6. The change in quantity is 3 ÷ 4.5 = 66.7%, the change in price is 1 ÷ 4.5 = 22.2%, and elasticity is about −3.0. Demand is elastic (absolute value above 1): buyers respond strongly, and revenue rises from $15 to $24 as price falls.
- From $3 to $2: quantity goes from 9 to 13. The change in quantity is 4 ÷ 11 = 36.4%, the change in price is 1 ÷ 2.5 = 40%, and elasticity is about −0.91. Demand is inelastic (absolute value below 1): the price cut lowers revenue from $27 to $26.
The same schedule therefore shows different elasticities in different price ranges, which is normal along a straight or gently curved demand line. A seller with elastic demand can usually raise revenue by cutting price. A seller with inelastic demand can raise price without losing many buyers.
How Demand Schedules Are Used
Pricing decisions. Multiplying each price by its quantity gives expected revenue at every row, and subtracting costs gives expected profit. The highest price is rarely the most profitable one, because the schedule shows how many buyers a higher price drives away.
Production and resource planning. Once a price is chosen, the schedule gives an expected sales volume. That figure drives orders for raw materials, equipment and labor (the inputs covered under the factors of production) and can help a firm lock in supply contracts ahead of time.
Comparing markets. Schedules built separately for different regions or customer groups show where demand is larger and where it is more price sensitive. Hypothetical example: a television maker estimates the following quarterly demand in two regions.
| Price per TV | Region A | Region B |
|---|---|---|
| $1,400 | 900 | 300 |
| $1,100 | 1,600 | 330 |
| $800 | 4,000 | 380 |
Region A responds sharply to price cuts, so a lower price there could bring large volume gains. Region B buys far fewer units and barely reacts to price, which suggests selling there at a higher price. A single combined schedule would have blurred both patterns.
Unusual Shapes and Exceptions
Not every demand schedule changes gradually. Consider a gift card with a $100 face value. Priced below $100, it is worth more than it costs, so demand would be very large. Priced above $100, there is almost no financial reason to buy it, unless something else is involved, such as a charitable donation attached to the purchase. The schedule jumps abruptly around the face value instead of declining smoothly.
Economics also recognizes rare cases where quantity demanded rises with price. Veblen goods are luxury items valued partly because they are expensive. Giffen goods are staple goods for very low-income households: a price rise eats so much of their budget that they cut back on pricier foods and buy more of the staple. Both are exceptions to the law of demand, not the typical case.
Limitations of a Demand Schedule
- It is a forecast. Survey answers and test results estimate behavior; they do not guarantee it. Firms should compare forecast schedules with actual sales once the product is on sale and refine their methods.
- It holds everything else constant. Income, preferences, competition, brand loyalty and outside events change constantly, so a schedule built under one set of conditions can mislead under another.
- It goes out of date. A smartphone’s schedule, for instance, can shift sharply once its successor is announced. Schedules need periodic review.
- Prices may need adjusting for inflation. Over long periods, a schedule in nominal dollars can confuse changes in purchasing power with changes in demand. Analysts often convert prices to real terms using a measure such as the Consumer Price Index.
FAQs
Is demand shown only on a demand schedule?
No. The same relationship can be expressed three ways: as a schedule (a table), as a demand curve (a graph) or as a demand function, an equation such as Q = 20 − 3P. The schedule is the easiest to read, the curve the easiest to see, and the equation the easiest to calculate with at any price.
Can you build a demand schedule from a single price and quantity?
Not on its own. One observation gives one point, and a schedule needs at least two to show how quantity responds to price. With a single point you would have to add an assumption, such as a known elasticity or slope, to estimate the other rows, and the result would depend entirely on that assumption.
The Bottom Line
Demand schedules matter to students learning how prices form and to firms setting prices, planning production or comparing regions. A schedule turns price and quantity data into revenue estimates and elasticity readings, but it is only a forecast built under fixed conditions. Firms should check it against actual sales, review it as markets change and adjust long-run figures for inflation.
