Economics Studio calculators
Principles of economics is full of diagrams you are meant to imagine moving: demand shifts right, a tax opens a wedge, a triangle of surplus disappears. The Economics Studio lets you move them yourself and see every number change as you drag.
It is built for students checking homework and teachers showing a class what happens when a curve moves. Each tool shows its working, so you can follow the algebra behind the picture, and every formula is checked against worked examples from open textbooks and university course material.
The market tools share one market, straight-line demand and supply, so a problem you set up in one carries over to the others. The production possibilities, GDP and money multiplier tools each work on their own.
Use this first
Supply and demand studioEquilibrium, consumer and producer surplus, taxes, subsidies and deadweight loss all live on one graph, and the other market tools zoom in on one idea each.Markets
- Supply and demand studioUse it when you need the equilibrium for two straight-line curves, or want to see what a per-unit tax or subsidy does to prices, quantity and surplus.
Elasticity
- Price elasticity of demand calculatorUse it when you have two prices and quantities (midpoint method) or a demand equation and a price (point method), and want to know whether demand is elastic or inelastic.
Surplus and policy
- Consumer and producer surplus calculatorUse it when you want consumer surplus, producer surplus and total surplus from demand and supply equations, with each area shaded.
- Tax incidence and deadweight loss calculatorUse it when a per-unit tax is involved and you want to see who bears it, what the government collects and how much surplus is lost.
- Price ceiling and price floor calculatorUse it when the question is about rent control, a minimum wage or a price support, and you want the shortage or surplus and who gains and loses.
Choice and trade-offs
- Production possibilities frontier (PPF) and opportunity cost calculatorUse it when you have a production possibilities frontier, as a curve or a table of points, and want the opportunity cost of moving between two points or whether a combination can be made.
Money and the whole economy
- GDP deflator calculator (real vs nominal GDP)Use it when you want real GDP from nominal GDP and the deflator, the deflator itself, or real growth and inflation between two years.
- Money multiplier calculatorUse it when the question is how a deposit or new reserves grow the money supply through rounds of bank lending, given a reserve requirement.
The market tools use the straight-line, competitive-market model taught in introductory courses, and the money multiplier is the textbook version with every bank lending all it can. Real markets and banks are messier; these are for building intuition and checking your working, not for forecasting prices or the money supply.
Every calculator lists the sources it was checked against, and how we test explains the process. Your inputs stay in your browser.