Calculate slope angle online
With this slope angle online calculator you can check whether a ramp , driveway or construction site slope is safe for your work platform or forklift - based on the slope angle, machine weight, wheelbase and friction coefficient.
The result shows you whether there is a risk of tipping or slipping. This calculation serves as a practical guide and does not replace an on-site assessment by a specialist.
Slope angle and tipping hazard – what you should know
When aerial work platforms, telehandlers, or forklifts are used on sloping terrain, slope and tipping forces act simultaneously. The steeper the ramp, the more the center of gravity shifts—and the greater the risk of the equipment tipping or sliding.
The slope angle describes the steepness of a surface. Even small differences in height and distance can significantly change the angle of inclination: A ramp with a 1 m height difference over a length of 5 m already has a slope of around 11 degrees – critical for many scissor lifts.
Not only the angle itself is important, but also factors such as the machine's weight , the wheelbase , the boom position , and the friction coefficient of the ground . These determine whether the tipping moment can still be compensated by the vehicle's weight.
The calculator offered here takes these influences into account to give you a realistic estimate.
However, it does not replace a technical inspection or on-site operational assessment. In cases of unclear terrain conditions or heavy loads, a specialist should always be consulted – especially if the ground is uneven, slippery, or not compacted.
