How to Measure Under Your Sink for Storage

Use a rigid tape measure, painter’s tape, a note app or paper, and a flashlight. Empty the cabinet enough to see its floor, back wall, hinges, drain, supply lines, and shutoff valves.

1. 01

   Usable width

   Measure the narrowest clear width inside, then measure the door opening separately. Include hinge arms, pipes, and the face frame.

2. 02

   Usable height

   Measure from the cabinet floor to the lowest obstruction. Repeat on each side of the drain because usable height often changes.

3. 03

   Usable depth

   Measure from the closed-door plane to the first obstruction at the back. Account for handles, drawer travel, pipes, and the cabinet lip.

Record each door opening and the center divider, if present. An organizer can fit the interior and still be impossible to angle through the opening. Note the cabinet lip or raised frame at the floor because it can catch wheels and pull-out drawers.

Open the doors as far as they normally travel. Mark the hinge sweep and make sure a drawer or basket can pass it.

• Measure the drain center from the left wall and cabinet floor.
• Record the lowest point and widest reach of the P-trap.
• Measure how far shutoff valves and supply lines project.
• Keep enough access to close valves and remove the trap.

If present, measure the full body—not only the connection at the sink. Include its lowest point, side clearance, discharge pipe, dishwasher hose, cord, and access to the reset button.

Translate the remaining floor into separate left, right, and front zones. Do not describe the whole cabinet as disposal-compatible space.

Use the smallest usable width, height, and depth for a conservative first search. Keep your obstruction sketch nearby when reviewing results. The Fit Finder confirms the outer product dimensions; you still verify that its shape and moving parts align with your cabinet’s open zones.