Bridle Angle Calculator
Calculate leg tensions, bridle angles, and vertical/horizontal force components for two-leg bridle rigging. Visualise the bridle geometry in real time.
Bridle Parameters
kg
m
m
m
Horizontal distance from pick A to load
This calculator is for estimation only. Always have a qualified rigger verify all calculations before loading any bridle. Never exceed rated Working Load Limits (WLL) of hardware.
Bridle Diagram
Results
Included Angle
—
Leg A Angle
—
Leg B Angle
—
Leg A Length
—
Leg B Length
—
Total Load Force
—
Leg A Tension
—
Leg B Tension
—
Tension Factor
—
Max leg tension ÷ load
Tension Factor Reference
Tension factor shows how much greater the leg tension is compared to a vertical (straight) hang, based on the included angle between bridle legs.
| Included Angle | Tension Factor | Risk Level |
|---|---|---|
| 0° | 0.50 | Low |
| 30° | 0.52 | Low |
| 60° | 0.58 | Low |
| 90° | 0.71 | Moderate |
| 120° | 1.00 | High |
| 150° | 1.93 | Very High |
| 170° | 5.76 | Extreme |
As a rule of thumb, never exceed a 120° included angle. Beyond this, leg tensions increase rapidly and dangerously.