Sling Angle Load Calculator

Inputs

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Known lifted load, including below-the-hook rigging that is carried by the sling set.
lbf
Count only sling legs that actually share the load. Unequal four-leg lifts often need a conservative lower loaded-leg count.
legs
Use the angle you can measure reliably. Included angle mode assumes a symmetric bridle.
Angle measured from the horizontal plane to the sling leg. A vertical leg is 90 deg.
°
Rated working load limit per sling leg for the sling type and hitch before this simple angle-utilization screen.
lbf

Results

Default result
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Leg tension (T)
577.4 lbf
Pass

2.568 kN · 577.4 lbf · 0.262 t

Also computed

Angle factor (1/sin(theta)) Pass 1.155 x

Effective horizontal angle (theta) 60 °

Vertical share per leg (W/n) 500 lbf

2.224 kN · 500 lbf

Horizontal component per leg (H) 288.7 lbf

1.284 kN · 288.7 lbf

Required per-leg WLL (WLLmin) 577.4 lbf

2.568 kN · 577.4 lbf

Total capacity at angle (C) 5,196 lbf

23.11 kN · 5,196 lbf

Method notes 3 notes
  • Leg tension uses T = W / (n x sin(theta)), where theta is the angle from horizontal and n is the loaded-leg count.
  • Included angle mode assumes symmetric opposite legs and converts to theta = 90 - A/2.
  • This is a geometry and WLL utilization screen only. Final lifting decisions need actual sling tags/tables, hitch factors, D/d, hardware, center of gravity, dynamic effects, inspection condition and qualified rigging review.

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