๐ Household
Shelving Weight Capacity Calculator
A shelf fails by bending, so capacity falls sharply as the span grows and rises with the square of the thickness and linearly with depth. Doubling the span roughly halves the load at which a shelf starts to sag noticeably.
How it works
Shelf material
Shelf thickness
Shelf depth
Unsupported span
Number of shelves
Safety factor
Safe load per shelf
Safe load per shelf
Total rack capacity
Load that causes visible sag
Maximum span advised
Verdict
Frequently asked questions
How do I use the Shelving Weight Capacity Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.