Price Elasticity of Supply Calculator

Price elasticity of supply (PES) measures the percentage change in quantity supplied divided by the percentage change in price. Mathematically, PES = (% Change in Quantity Supplied) / (% Change in Price). Depending on the inputs provided, the calculator uses either standard percentage formulas or the midpoint (arc elasticity) formula to yield precise supply sensitivity metrics across different market conditions.

Imagine a local bakery currently supplies 1,000 loaves of bread per week when the price is $2.00 per loaf (Q0 = 1000, P0 = 2.00). If the price rises to $2.50 per loaf (P1 = 2.50), the bakery increases production to 1,400 loaves per week (Q1 = 1400). Using the midpoint method, the percentage change in quantity supplied is ((1400 - 1000) / 1200) = 33.33%, and the percentage change in price is ((2.50 - 2.00) / 2.25) = 22.22%. Dividing 33.33% by 22.22% gives a PES of 1.5, indicating elastic supply.

Always verify whether you are using point elasticity or arc elasticity before running the numbers, as different methods can yield slightly varying results over large price gaps. Remember that PES is almost always positive because of the law of supply, which states that price and quantity supplied move in the same direction. Use consistent units for quantity and currency throughout your dataset to maintain calculation accuracy.