How Are Dishwashers Measured?

Size

• If you're buying a dishwasher, one of the first measurements you need to be aware of is its size. For example, under-counter dishwasher spaces in most homes are limited. The height of the dishwasher cannot exceed the available area under the counter. A dishwasher must be no larger than the height of the opening, known as a cutout, from floor to the bottom of the counter, the width between both sides and the depth from the front of the countertop to the back. Otherwise, it will not fit.

Capacity

• A dishwasher's capacity refers to how much can fit in the machine before it is full. This is typically measured in place settings, with a standard dishwasher holding about 12 place settings. Larger machines may hold as many as 16 place settings, while compact models hold about eight.

Gallons per Cycle

• Dishwashers use water jets to clean dishes. Modern, highly efficient dishwashers may even use less water than it would take to clean the dishes by hand. The amount of water a dishwasher uses to wash a load is known as its GPC, or gallons per cycle. This measurement is typically listed in the dishwasher's specifications.

Energy Efficiency

• Different dishwashers use energy in various amounts. The machine's energy factor, or EF, measures the amount of energy a dishwasher uses to operate. To determine the EF, divide the estimated number of loads per year (215) by the number of kilowatt hours the appliance uses annually. The lower the number, the less efficient the dishwasher is.