Price Elasticity of Supply Calculator
Measure how quickly and by how much producers can respond to a price change — enter the before and after price and quantity supplied to get the PES coefficient and its economic classification.
Elastic
- 1
% change in price
(12 − 10) ÷ 10 × 100 = 20 % - 2
% change in quantity supplied
(130 − 100) ÷ 100 × 100 = 30 % - 3
Price Elasticity of Supply
30 % ÷ 20 % = 1.5000Positive sign reflects the direct relationship between price and quantity supplied.
How does this calculator work?
PES = ((Q₂−Q₁)/Q₁) ÷ ((P₂−P₁)/P₁). If price rises 20% and quantity supplied rises 30%, PES = 1.5 (elastic). PES > 1 = elastic (supply responds strongly); PES < 1 = inelastic (supply responds weakly); PES = 1 = unit elastic. Always positive for normal goods.
Formula
How this is calculated
Price elasticity of supply (PES) measures how much the quantity supplied of a good changes when its price changes. Unlike demand elasticity, supply elasticity is almost always positive — a price rise normally encourages producers to supply more. The formula divides the percentage change in quantity supplied by the percentage change in price, both calculated relative to their initial (base) values (point elasticity).
The classification mirrors demand elasticity: PES > 1 is elastic — producers respond strongly to price signals, expanding output proportionally more than the price rose; PES < 1 is inelastic — output changes little, either because production requires scarce inputs, long lead times, or fixed capacity; PES = 1 is unit elastic — output rises exactly in proportion to price. Perfectly inelastic supply (PES = 0) means output cannot change at all (e.g. land in the short run), while perfectly elastic supply (PES → ∞) means producers can supply any amount at a single price.
Key drivers of supply elasticity: spare production capacity (elastic if capacity is available), factor mobility (easier to switch inputs → more elastic), time horizon (supply becomes more elastic over longer periods as firms invest in capacity), and perishability (perishable goods tend to be inelastic as producers cannot store unsold output). The linear supply curve plotted here is an approximation through your two data points; real supply curves are often non-linear.
Frequently asked questions
Because supply and price move in the same direction — when price rises, suppliers are willing to produce more (law of supply). Demand moves in the opposite direction — when price rises, consumers buy less (law of demand). Hence PES ≥ 0 and PED ≤ 0 for normal goods.
The main factors are available spare capacity, the ease of acquiring inputs, the time horizon (firms need time to expand output), and whether key inputs like land are fixed. Agricultural products are typically inelastic in the short run; manufactured goods can be highly elastic when factories have spare capacity.
When supply is inelastic, producers bear more of the burden of an indirect tax (they cannot easily reduce output to avoid it). When supply is elastic, buyers bear more of the tax burden because producers can quickly exit or expand. PES and PED together determine how a tax is split between buyers and sellers.
Also known as
TG we-Calculate Editorial Team. (2026). Price Elasticity of Supply Calculator [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/price-elasticity-supply-calculator
TG we-Calculate Editorial Team. "Price Elasticity of Supply Calculator." TG we-Calculate. 2026. https://we-calculate.com/calculator/price-elasticity-supply-calculator.
TG we-Calculate Editorial Team, "Price Elasticity of Supply Calculator," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/price-elasticity-supply-calculator
@misc{wecalculate_price_elasticity_supply_calculator, title = {Price Elasticity of Supply Calculator}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/price-elasticity-supply-calculator}}, year = {2026}, note = {TG we-Calculate} }
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