Sling Angle Calculator

Safety Rule: As the angle between the sling leg and the horizontal decreases, the tension in the sling leg increases. Never lift below 30°.

Tension Calculator

Enter your load weight and the sling angle to verify if your slings are strong enough.

Tension Per Leg (2-Leg Sling)
0 kg
Load Factor: 1.154
⚠️ CRITICAL ANGLE: TENSION DOUBLES!

Load Factor Guidelines

Leg Angle (Horizontal) Load Factor Tension Multiplier
90°1.000x 1.0
85°1.003x 1.003
80°1.015x 1.015
75°1.035x 1.035
70°1.064x 1.064
65°1.103x 1.103
60°1.154x 1.154
55°1.220x 1.220
50°1.305x 1.305
45°1.414x 1.414
40°1.555x 1.555
35°1.743x 1.743
30°2.000x 2.0

Quick Quiz: Test Your Knowledge

1. If lifting 1000kg with 2 legs at 90°, what is the tension per leg?

2. At 30°, the Load Factor is 2.000. If the load is 1000kg (500kg per leg vertical), what is the tension now?

3. What is the standard Load Factor for a 60° angle?

4. Why is lifting at 30° considered dangerous?