Shelf Bracket Spacing Calculator
Calculate correct bracket spacing from shelf material, thickness, depth, and load.
Prevent shelf sagging with the right bracket placement.
Maximum Bracket Spacing
Shelf Bracket Spacing
Maximum span depends on the shelf material and expected load:
| Material | Thickness | Light Load | Medium Load | Heavy Load |
|---|---|---|---|---|
| Plywood (3/4 in) | 19mm | 36 in | 28 in | 20 in |
| MDF (3/4 in) | 19mm | 28 in | 20 in | 16 in |
| Solid wood (3/4 in) | 19mm | 40 in | 32 in | 24 in |
| Melamine (3/4 in) | 19mm | 24 in | 18 in | 14 in |
| Thick plywood (1 in) | 25mm | 48 in | 36 in | 28 in |
Load categories:
- Light — books (paperback), decorative items
- Medium — hardcover books, small appliances
- Heavy — large appliances, tools, heavy collections
MDF sags most — always use closer bracket spacing for MDF than plywood.