Supply & Demand Market Equilibrium Calculator

Calculate market equilibrium price (P*) and quantity (Q*). Compute Consumer Surplus, Producer Surplus, and total market welfare.

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How to Use Supply & Demand Market Equilibrium Solver

  1. Enter Demand curve parameters: Qd = a - bP (intercept a, slope b).
  2. Enter Supply curve parameters: Qs = c + dP (intercept c, slope d).
  3. View Equilibrium Price (P*), Quantity (Q*), Consumer Surplus (CS), and Producer Surplus (PS).

Market Welfare & Social Surplus

Consumer surplus is the area below demand and above price. Producer surplus is the area above supply and below price.

Frequently Asked Questions

How is Market Equilibrium determined?
Set Qd = Qs: a - bP = c + dP => P* = (a - c) / (b + d). Substitute P* back to find Q*.