Gear Ratio Formula Mechanical, Learn the mechanics of gear ratios, speed-torque relationships, and power transmission for engineering and design applications. Supports Imperial (lb-ft, HP) and Metric (Nm, kW) units with step-by-step solutions and unit conversions. Learn how to calculate gear ratio with step-by-step formulas & examples. Learn Gear Ratio Calculation, methods, examples and formula. Gear ratio is an important concept in mechanical engineering because it allows engineers to design systems that can efficiently transfer power and torque from one component to another. 75 to 2 kg m2. In other words, the Gear ratio is the ratio between the number of teeth on two gears that are meshed together, or two sprockets connected with a common roller chain, or the circumferences of two pulleys connected with a drive belt. The gear ratio is to be considered the optimum value as defined by Eq. This calculator determines the relationship between engine rotational speed and vehicle velocity, accounting for the gear reduction through the drivetrain system. The optimum gear ratio, n ∗ can be calculated, using Eq. lpq, kfu, kht, sqny1fi, mend, jln0, cvxn, 5i, qyje, xf,