Estimate a crane’s theoretical tipping load from body weight, counterweight and their lever arms about the tipping axis. Not a rated lifting capacity.

Exclude the separately entered counterweight. Include only modeled stabilizing weight.

Horizontal distance from the tipping axis (outrigger or track edge) to the crane body’s centre of gravity.

Horizontal distance from the same tipping axis to the hook load.

Changing this unit reinterprets all entered load values; it does not convert them.

Changing this unit reinterprets all entered distances; it does not convert them.

Counterweight and comparison
Blank means no separate counterweight.

Required when a positive separate counterweight is entered.

Blank means 1. An arithmetic comparison, not a safety-factor approval.

Blank omits the comparison ratio.

Crane Tipping Load Formula

The following equation is used to calculate the Crane Tipping Load.

TL = (W × D1 + C × Dc) / D2
  • Where TL is the tipping load (weight, lbs, kg, etc.)
  • W is the modeled crane body weight, excluding any separately entered counterweight; C is that counterweight and Dc is its stabilizing lever arm. Use consistent mass or force units.
  • D1 is the distance from the center of gravity of the crane to the tipping axis point
  • D2 is the distance from the center of gravity of the load to the tipping axis point

Add the modeled body and counterweight stabilizing moments about the same tipping axis, then divide by the load’s horizontal perpendicular lever arm. With no separate counterweight this reduces to W × D1 / D2. An entered comparison divisor produces only an arithmetic scenario, not a safe or allowable lifting load.