**Older washing machines use 151.4 to 170.3 liters of water per load, and high-efficiency washing machines use 53 to 94.6 liters of water per load.** Exact figures vary because washing machines come in different sizes and capacities. Water factor ratings are used to compare machines.

A water factor rating describes the amount of water a washing machine uses to wash a cubic foot of laundry. An older machine has a WF of 10 or higher and consumes 45.4 cubic meters or 12,000 gallons of water annually. A high-efficiency machine has a WF of 8. Upgrading to a high-efficiency washing machine can reduce a family's water use by up to 22.7 cubic meters or 6,000 gallons per year.