Shelving Calculator

This calculator works out the number of shelf brackets, wall fixings and wall plugs needed for your shelving project. It adjusts bracket spacing based on the expected load and recommends the correct fixing type for your wall construction.

Bracket spacing

Light items (ornaments, pictures): 600mm centres.
Books and moderate weight: 450mm centres.
Heavy items (tools, equipment): 300mm centres.

Brackets are placed approximately 50mm from each end of the shelf, with intermediate brackets evenly spaced. The formula is:

Brackets per shelf = 2 (end brackets) + ceil((shelf length - 100mm) / spacing) - 1

Fixings by wall type

• Brick/block: 2× No.10 screws + brown wall plugs per bracket
• Stud wall: 2× No.10 screws directly into timber stud (no plugs)
• Dot and dab: 2× spring toggles per bracket (open behind plasterboard)

Bracket sizing

The bracket size should match the shelf depth. A 200mm shelf uses a 200mm bracket. This ensures the shelf is properly supported across its full depth.

Standards

Shelving fixings should be appropriate for the wall type and expected load. For walls in domestic properties, refer to the fixing manufacturer's load ratings and the shelf-board manufacturer's span limits. Shelves in commercial or public buildings that form part of the structure may need to be designed to the imposed loads in BS EN 1991-1-1 (Eurocode 1: Actions on structures, imposed loads for buildings), which superseded the withdrawn BS 6399-1 in 2002.