How can one calculate the deadweight loss in a monopoly market?

To calculate the deadweight loss in a monopoly market, you can compare the quantity of goods produced and consumed in a competitive market to the quantity produced and consumed in a monopoly market. The deadweight loss is the loss of economic efficiency that occurs when the monopoly restricts output and raises prices above the competitive level. This results in a reduction in consumer surplus and producer surplus, leading to a net loss in overall welfare.