For Hobbyists & Makers · Supply & Demand
Supply & Demand for a Cournot duopoly
Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate a Cournot duopoly live below — adjust the inputs and watch it respond, right in your browser.
Supply & DemandLive
market equilibrium & surplus
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Where the downward demand curve crosses the upward supply curve, the market clears: that price and quantity are the equilibrium. Shifting either curve moves it. The shaded triangles are consumer and producer surplus — the total gains from trade. A per-unit tax lifts the supply curve, raising price, cutting quantity, and creating deadweight loss.
Data Inspector
Equilibrium price$60.0
Equilibrium qty40.0
Consumer surplus800
Producer surplus800
Governing equation
Reading this result: At the free-market equilibrium of $60.0, 40.0 units clear and the combined surplus (1600) is maximized.
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Frequently asked questions
- Is this good for hobbyists & makers?
- Yes — this version of "Supply & Demand for a Cournot duopoly" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.