What does the incline number on the fitness equipment mean? Is it the equivalent of incline grade on the road?
The gradient or treadmill grade equating to incline percentages is a measurement of the height distance for every 100-horizontal distance. e.g. A one-in-100 gradient = 1%, and a rise of 15 meters for every 100 meters is a 15% grade.
You may use trigonometry to measure the gradient L = √ (D2 - H2)