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Cross-Price Elasticity Calculator.

Calculate midpoint cross-price elasticity from two price and quantity observations.

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Elasticity: -1.22

Elasticity

-1.22

Calculations use the inputs shown and update automatically as you edit them.

FAQs

How is Cross-Price Elasticity calculated?

Elasticity is a descriptive estimate based only on the entered observations.

Cite this calculator

Canonical URL: https://mathify.one/ru/finance/cross-price-elasticity

Cite as: Mathify. (2026). Калькулятор: Cross-Price Elasticity. https://mathify.one/ru/finance/cross-price-elasticity

Use Cases

Identify substitute or complementary goods

Businesses can use cross-price elasticity to understand how changes in a competitor's price affect demand for their own product, informing pricing and marketing strategies.

Example: If a coffee shop raises prices and a tea shop sees increased sales, the positive elasticity indicates they are substitutes.

Evaluate market reactions to price changes

Economists and analysts use cross-price elasticity to assess how interconnected markets are, helping in policy analysis and forecasting demand shifts.

Example: A negative elasticity between gasoline and cars suggests they are complements, so a gas price hike may reduce car demand.

Frequently Asked Questions

What is cross-price elasticity of demand?
Cross-price elasticity measures how the quantity demanded of one good changes when the price of another good changes. It's calculated as the percentage change in quantity demanded of good A divided by the percentage change in price of good B. A positive value indicates substitutes, negative indicates complements.
How is the midpoint method used in this calculator?
The midpoint method calculates percentage changes relative to the average of the initial and new values. For cross-price elasticity, it uses the average of the two quantities and the average of the two prices to avoid bias from the direction of change, giving a symmetric measure.
What does a positive or negative result mean?
A positive cross-price elasticity means the two goods are substitutes (e.g., tea and coffee) – a price increase in one boosts demand for the other. A negative value means they are complements (e.g., printers and ink) – a price increase in one reduces demand for the other.

Tips & Common Mistakes

Tips

  • Ensure you enter the initial and new prices and quantities in the correct order to get an accurate midpoint elasticity.
  • Use consistent units for prices and quantities (e.g., dollars and units) – the calculator handles the math, but your inputs should be realistic.
  • Remember that the midpoint method gives a symmetric measure, so the result is the same regardless of which observation is 'initial' or 'new'.
  • Interpret the magnitude: values greater than 1 indicate strong substitutability or complementarity, while values near 0 suggest weak relationships.

Common Mistakes to Avoid

  • Using the simple percentage change formula instead of the midpoint method, which can lead to different results depending on the direction of change.
  • Confusing the order of goods: the calculator expects quantity of one good and price of another – make sure you match the correct pairs.
  • Misinterpreting the sign: a positive result does not always mean a strong substitute; consider the magnitude and context.

Last updated: August 13, 2026