Price elasticity of demand: can you raise prices without losing sales?
Every price change is a bet: will the extra margin per sale outweigh the sales you lose? Price elasticity is the number that turns that bet into a calculation.
Skip the math — the free price elasticity calculator runs this from your own figures.
Open the free calculator →What elasticity measures
Price elasticity of demand measures how sensitive your sales volume is to price. Formally, it's the percentage change in quantity sold divided by the percentage change in price. If a 10% price increase causes sales to drop 10%, elasticity is about 1; if sales drop only 3%, elasticity is about 0.3. The number captures, in one figure, how strongly your customers react when you move the price.
Because price and quantity usually move in opposite directions, elasticity is technically negative, so people typically talk about its magnitude — how far from zero it is. That magnitude is what matters for decisions: it tells you whether your demand is the kind that punishes price increases or the kind that tolerates them.
Elastic versus inelastic
When elasticity's magnitude is above 1, demand is 'elastic': volume reacts more than proportionally to price, so a price increase loses enough sales that total revenue can fall. When it's below 1, demand is 'inelastic': volume moves less than proportionally, so a price increase raises revenue because you keep most of your customers while earning more from each. At exactly 1, revenue is roughly unchanged by a price move.
This is the practical heart of it. If your demand is inelastic, you likely have room to raise prices and grow revenue — a common and valuable discovery, since many businesses underprice out of fear. If it's elastic, price increases are risky and you compete more on value than on price. Knowing which side of 1 you're on changes your whole pricing posture.
Measuring it from your own data
Textbook elasticity numbers are a starting point, but your own is what counts, and you can estimate it from two points where the price differed and you recorded the volume — a past price change, a controlled test, or two comparable periods. The midpoint method, which measures percentage changes against the average of the two points, gives a cleaner, more symmetric figure than measuring from a single starting point, which is why it's the standard approach.
The main caution is isolating price. If a promotion, a seasonal swing, or a competitor's move happened at the same time as your price change, the volume difference reflects those too, and your elasticity estimate gets muddied. The cleaner your two points — ideally differing mainly in price — the more you can trust the result. Even a rough estimate, though, is usually more useful than pricing on pure instinct.
Turning elasticity into a pricing decision
Elasticity doesn't just tell you whether to raise prices — combined with your volume and price it tells you the revenue impact of a specific move, and if you know your margins, the profit impact too. An inelastic product where a price rise keeps most customers can lift both revenue and profit; an elastic one may need the opposite, using price to drive volume. The number reframes pricing from a nervous guess into a modelled choice.
The free calculator estimates your elasticity from two price-and-volume points and shows whether demand is elastic or inelastic, and the full model projects the revenue impact of price changes. It's assumptions-driven and not financial advice, but it gives you the one number that tells you whether there's money being left on the table — or risk in the price you're tempted to charge.
Questions
What does it mean if my demand is inelastic?
Inelastic demand — an elasticity magnitude below 1 — means your sales volume doesn't move much when you change price. Practically, that usually signals room to raise prices: because you'd keep most of your customers while earning more from each, a price increase tends to raise total revenue rather than shrink it. Many businesses discover they're more inelastic than they feared and have been underpricing out of caution. That said, elasticity can change as prices rise further or competitors react, so it's worth re-measuring rather than assuming today's inelasticity holds at any price.
How many data points do I need to measure elasticity?
At a minimum, two: a pair of periods or scenarios where the price differed and you recorded how many units sold at each. The midpoint method then gives an elasticity estimate from just those two points. The important thing isn't the number of points but their cleanliness — ideally price is the main thing that changed between them, with promotions, seasonality, and competitor moves held as steady as possible. More points across a range of prices give a richer picture and let you see whether elasticity shifts at different price levels, but two clean points are enough to start.