Whether you are replacing an existing dishwasher or installing a new dishwasher into a kitchen for the first time, it is important to measure carefully. Although many manufacturers will tell you that dishwashers have standard measurements, some newer dishwashers are taller than older models. If you do not measure accurately before choosing a dishwasher, it might not fit or work properly.
Place the end of the tape measure on the floor in front of the space where you will install the dishwasher. Start with the tape measure on the left edge of the dishwasher opening.
Extend the tape measure up to the bottom of the counter above the dishwasher opening.
Note the measurement on the tape measure and write down the exact measurement.
Move the tape measure over to the center of the dishwasher opening and measure the distance between the floor and the bottom edge of the counter. Write down this measurement.
Move the tape measure over to the right side of the dishwasher opening and measure the distance again. Write this measurement down. Measuring the height at three points along the opening will help you determine whether your dishwasher space is level (which you can accommodate by adjusting the dishwasher after you install it).
Place the end of the tape measure at the top left edge of the dishwasher space (the inside edge of the opening).
Extend the tape measure straight across the opening to the top right edge. Write this measurement down.
Place the end of the tape measure at the center left edge of the space and extend the tape measure straight across the space to measure the distance again. Write this measurement down.
Move the tape measure down to the bottom left edge of the space and measure the distance across the space. Write this measurement down.
Take these measurements with you as you shop for a dishwasher to ensure you select a dishwasher that will fit in your space.