Length of Belt (\(L\)):

\[ L = 2C + 1.57(Dr + Dn) + \frac{(Dr - Dn)^2}{4C} \]

Where:

• \(L\) is the length of the belt, inches.
• \(C\) is the center distance between pulleys, inches.
• \(Dr\) is the diameter of the driver pulley, inches.
• \(Dn\) is the diameter of the driven pulley, inches.