Supply & Demand for a tax policy
Simulate a tax policy live in your browser. This runs the real Supply & Demand solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.
Controls
Presets
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
Governing equation
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
About this simulation
The full Supply & Demand tool models a tax policy with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.
More you can do with Supply & Demand
Other ways to simulate a tax policy
Frequently asked questions
- How do I simulate a tax policy?
- Open this page and use the live Supply & Demand tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
- Is it free?
- Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
- Can I use my own numbers?
- Absolutely — every input is adjustable, and with data import you can drive a tax policy from your own measurements.