Enter the slope angle of the test track (degrees), the weight of the vehicle (lbs), and the maximum recommended GVW of the vehicle (lbs) into the Gradeability Calculator. The calculator will evaluate the Gradeability.

## Gradeability Formula

The following formula is used to calculate the Gradeability.

**GRB = 100 * tan(sin^-1((sin(a)*Wv)/Wgvr))**

Variables:

- GRB is the Gradeability ( )
- a is the slope angle of the test track (degrees)
- Wv is the weight of the vehicle (lbs)
- Wgrv is the maximum recommended GVW of the vehicle (lbs)

## How to Calculate Gradeability?

The following steps outline how to calculate the Gradeability.

- First, determine the slope angle of the test track (degrees).
- Next, determine the weight of the vehicle (lbs).
- Next, determine the maximum recommended GVW of the vehicle (lbs).
- Next, gather the formula from above = GRB = 100 * tan(sin^-1((sin(a)*Wv)/Wgvr)).
- Finally, calculate the Gradeability.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

slope angle of the test track (degrees) = 30

weight of the vehicle (lbs) = 2000

maximum recommended GVW of the vehicle (lbs) = 2500

GRB = 100 * tan(sin^-1((sin(a)*Wv)/Wgvr)) =** ** ?