Standard base cabinets are 34 1/2 inches tall. When coupled with a standard 1 1/2-inch countertop, they are 36 inches tall from floor to countertop. This height will match with standalone oven/stoves and will fit standard dishwashers. Base cabinets are also available in 30- to 31-inch heights for those who must sit while working or for specialty workstations such as a pastry counter or office nook.
Standard wall cabinets are 30 inches tall and are usually installed with a soffit above them. Tall, 42-inch wall cabinets are also available for kitchens with high ceilings or where there is no soffit. Tall cabinets provide extra storage and make use of the otherwise unused space of a soffit.
The Space Between
Most wall cabinets are installed 18 inches above the countertop. Countertop appliances will easily fit in this 18-inch space, but wall cabinets can be lowered if 18 inches feels too high to easily access things stored in them.