Price Elasticity of Supply Calculator
Calculate signed two-point supply arc elasticity with the midpoint method.
Es = (ΔQ / avgQ) / (ΔP / avgP)
Use comparable units and periods. Es = [(Q₂−Q₁)/((Q₁+Q₂)/2)] / [(P₂−P₁)/((P₁+P₂)/2)]. The signed result describes two observations, not an entire supply curve or a causal estimate. Negative values mean observed price and quantity moved in opposite directions.
All inputs stay in this browser. No data is fetched.
Conceptual source: OpenStax · 5.1
A QUICK WALKTHROUGH
How to use this tool
- Calculate signed two-point supply arc elasticity with the midpoint method.
- Use comparable units and periods. Es = [(Q₂−Q₁)/((Q₁+Q₂)/2)] / [(P₂−P₁)/((P₁+P₂)/2)]. The signed result describes two observations, not an entire supply curve or a causal estimate. Negative values mean observed price and quantity moved in opposite directions.
- Calculate
Formula
Es = (ΔQ / avgQ) / (ΔP / avgP)
Scope and limits
Use comparable units and periods. Es = [(Q₂−Q₁)/((Q₁+Q₂)/2)] / [(P₂−P₁)/((P₁+P₂)/2)]. The signed result describes two observations, not an entire supply curve or a causal estimate. Negative values mean observed price and quantity moved in opposite directions.
Local processing
All inputs stay in this browser. No data is fetched.
GOOD TO KNOW
Common questions
How should I read the result?
Use comparable units and periods. Es = [(Q₂−Q₁)/((Q₁+Q₂)/2)] / [(P₂−P₁)/((P₁+P₂)/2)]. The signed result describes two observations, not an entire supply curve or a causal estimate. Negative values mean observed price and quantity moved in opposite directions.