Supply and Demand Tool

Use this to show how curves shift and how policies change outcomes. Labels use simple English.

Demand Supply Demand after shift Supply after shift

Model

Max Price:

Max Quantity:

Demand intercept a:

Demand slope b:

Supply intercept c:

Supply slope d:

Demand shift: 0

Supply shift: 0

Show demand Show supply

Show shifted demand Show shifted supply

Show price ceiling

Show price floor

Note: Demand uses Q = a - bP. Supply uses Q = c + dP. Shifts move the whole curve left or right.

Built for classroom demos. Simple linear model for clarity.
Supply and demand chart © 2025 by James Abela is licensed under CC BY-NC-SA 4.0