Calculator
Hook and shelf spacing calculator
Give it the width of your wall and the number of hooks you want. It returns the even spacing, warns you when coats will crowd, and shows where the hem of a coat and the underside of a shelf end up. Nothing leaves your device.
13.3 in between hook centres
Worked example (shown when scripts are off): a 48 inch wall with a 4 inch margin each side leaves a 40 inch run. Four hooks means three gaps, so 40 divided by 3 is about 13.3 inches. The most that would fit at a 7 inch minimum is six.
Before you decide
Hang the hooks only into studs or with anchors rated for the load, and follow the maker's instructions. Renters should check the lease before drilling. Mark positions with painter's tape on the wall first and stand back to look.
The rule in words
The usable run is the wall width minus a margin at each end. For several hooks the even spacing is that run divided by the number of gaps, which is the hook count minus one. A single hook is centred on the wall. The most hooks that can fit is the run divided by the minimum spacing, rounded down, plus one.
The minimums are 6 inches for light jackets and bags, 7 inches for everyday coats and 9 inches for bulky winter coats. These are common design rules of thumb rather than standards, because the right figure depends on the coats and the hook shape. Hooks closer than the minimum make coats overlap, which is why a tight row looks messy and slows everyone down.
Heights
For adults, hooks in the mid-60s of inches from the floor keep most coats clear of the ground and are a common starting point. If you want children or wheelchair users to reach a hook, the ADA Standards for Accessible Design set a forward reach range of 15 to 48 inches above the floor, so a lower row at or under 48 inches works for them. The tool measures the coat hem as hook height minus coat length, and warns when the hem is near the floor or will rest on a bench.
The ADA also gives bench seat height as 17 to 19 inches, which is why the bench field defaults to 18. A shelf above the hooks is shown about 10 inches higher than the hook line, our rule of thumb for leaving room to hang and reach.
Limits
The calculator does not know your studs, wall material, door swing or hook shape. It does not set a minimum walkway, though a path of around 36 inches is a common planning figure for getting past people comfortably. It is general information, not a building or accessibility review. The capacity calculator will tell you how many hooks to plan for, and the small-space furniture guide helps when the wall is short.
Where this comes from
The reach range (15 to 48 inches) and bench seat height (17 to 19 inches) come from the 2010 ADA Standards for Accessible Design as published by the US Access Board, which we checked through search results quoting those sections. The hook minimums, the 10 inch shelf offset and the 4 inch default margin are our own planning assumptions, and we have not tested them on real walls.