A Deadweight Loss, also known as excess burden or allocative inefficiency, is a loss of economic efficiency that can occur when equilibrium for a good or a service is not achieved. That can be caused by monopoly pricing in the case of artificial scarcity, an externality, a tax or subsidy, or a binding price ceiling or price floor such as a minimum wage.

Deadweight loss refers to the loss of economic efficiency when the equilibrium outcome is not achievable or not achieved.

The Deadweight Loss Calculator helps calculating Deadweight Loss, given Supply and Demand curves and Selling Price