A kitchen cabinet can have height to spare and still leave you guessing how many shelf tiers it will take. Enter the inside height, the height of whatever goes in, the thickness of one shelf board and the clearance you want above the items. The tool returns the tiers that fit, the boards that takes, and the height left over. Switch the item height to compare standing plates against stacked mugs.
The bottom tier sits on the cabinet floor, so boards are only needed from the second tier up. Tiers are therefore the inside height plus one board thickness, divided by the height one tier consumes (item height plus clearance plus board thickness), rounded down. Boards needed is that tier count minus one. Since the question is how many tiers fit, the figure is rounded down (as of October 2026).
No authoritative recommended clearance above stored items is offered here. It depends on how you reach in and on the shape of the items, so it stays an input. Load capacity, wall fixing methods and where to place which item are not covered. Rail-mounted shelving needs supports beyond the board thickness and may measure differently, so follow the cabinet manufacturer guidance first.
Frequently Asked Questions
No authoritative recommended value is offered here, because it depends on how you reach in and on the shape of the items. Enter the figure you want and it is added to the height one tier consumes.
Because the bottom tier sits on the cabinet floor. Three tiers need two boards.
No. No authoritative standard for shelf load capacity or wall fixing was confirmed. This page calculates height measurements only.