basic

Rope Working Load Calculator

Working load limit from breaking strength and safety factor.

Compute the safe working load limit (WLL) of a rope, sling, or chain from its rated breaking strength and a chosen safety factor (5 typical for general rigging, 10 for overhead lifting of personnel).

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

lb

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

WLL = breaking strength / safety factor

In depth

Compute the safe working load limit (WLL) of a rope, sling, or chain from its rated breaking strength and a chosen safety factor (5 typical for general rigging, 10 for overhead lifting of personnel).