Free Engineering Tool #217

Sling Capacity at Angle Calculator

Calculate the effective working load limit (WLL) of a sling at various angles from vertical. Supports 1–4 leg slings.

WLL × cos(θ)1–4 LegsRigging
Quick presets

Results

Effective WLL (assembly)
Angle Factor
Tension per Leg
Sling Configuration

Sling Angle Factor

Angle from verticalFactor (cos θ)% of WLL
1.00100%
15°0.9797%
30°0.8787%
45°0.7171%
60°0.5050%

⚠️ Warning: Never use slings at angles greater than 60° from vertical. For 4-leg slings, use the 3-leg factor (assume one leg carries no load) unless all legs are verified to share load equally.

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