Price Elasticity Calculator
Calculate the price elasticity of demand to see how sensitive your customers are to price changes. Essential for pricing strategy, revenue optimization, and market research.
About this calculator
Price Elasticity of Demand (PED) quantifies the percentage change in quantity demanded resulting from a one-percent change in price. The formula is: PED = (ΔQ / Q₀) / (ΔP / P₀), where ΔQ is the change in quantity, Q₀ is the initial quantity, ΔP is the change in price, and P₀ is the initial price. A PED with an absolute value greater than 1 indicates elastic demand — consumers are highly sensitive to price changes. A value between 0 and −1 indicates inelastic demand, where price changes have little effect on quantity sold. Most goods have a negative PED because higher prices reduce demand; the sign is sometimes ignored and only the magnitude reported. Understanding elasticity helps businesses decide whether raising prices will grow or shrink total revenue.
How to use
Suppose a store sold 500 units at $10 each. After raising the price to $12, sales fell to 400 units. Step 1: Enter 500 as Initial Quantity and 400 as New Quantity. Step 2: Enter $10 as Initial Price and $12 as New Price. Step 3: ΔQ/Q₀ = (400 − 500) / 500 = −0.20 (−20%). Step 4: ΔP/P₀ = (12 − 10) / 10 = 0.20 (20%). Step 5: PED = −0.20 / 0.20 = −1.0. An elasticity of −1.0 means demand is unit elastic — the percentage drop in sales exactly offset the price increase, leaving total revenue unchanged.
Frequently asked questions
What does a price elasticity of demand greater than 1 mean for my business?
A price elasticity greater than 1 in absolute value means your product has elastic demand — customers are quite sensitive to price changes. If you raise your price, the percentage drop in quantity sold will exceed the percentage price increase, causing total revenue to fall. Conversely, lowering prices on elastic goods tends to boost total revenue because the volume gain outweighs the margin reduction. Products with many close substitutes, such as generic consumer goods, tend to be highly elastic.
Why is price elasticity of demand usually a negative number?
PED is typically negative because of the law of demand — as price rises, quantity demanded generally falls, creating an inverse relationship. When you divide a negative percentage change in quantity by a positive percentage change in price, the result is negative. Economists often report the absolute value for simplicity, referring to a product as 'elastic' or 'inelastic' without focusing on the sign. Giffen goods and Veblen goods are rare exceptions where demand increases with price, producing a positive elasticity.
How can I use price elasticity to maximize revenue from a product?
If your product is price inelastic (|PED| < 1), raising the price will increase total revenue because the drop in sales volume is proportionally smaller than the price increase. If demand is elastic (|PED| > 1), lowering the price tends to increase revenue through higher volume. The revenue-maximizing price point occurs where elasticity equals −1, known as unit elasticity. Businesses can estimate their PED through A/B price tests, historical sales data analysis, or conjoint surveys, then adjust their pricing strategy accordingly.