Gear Ratio Formula Teeth, Gear ratio is calculated by dividing the number of driven gear teeth by the number of driver gear teeth. It is the ratio of the number of teeth on the driven gear to the number of teeth on the driving gear. Mar 5, 2026 · Expressed mathematically, the total gear ratio equals the product of teeth on all driving gears divided by the product of teeth on all driven gears. This simple formula determines how many times the input gear must turn to make the output gear complete one rotation. So in this example, since there are 54 teeth on the larger gear and 18 teeth on the pinion. Learn the formulas, examples, and how gearing affects acceleration, cruising, towing, and fuel economy. This is of particular importance on gears of few teeth or if the gear blank configuration requires the use of a small diameter shaper cutter, in which case the dedendum may need to be increased to as much as 1. This ratio can be expressed as the number of gear teeth divided by the number of pinion teeth. The final drive gear ratio can be calculated by dividing the number of teeth on the rear sprocket by the number of teeth on the counter-shaft sprocket. Jun 4, 2026 · Driver Gear Teeth Driven Gear Teeth Driver RPM Calculate Reset Gear Ratio: Driven Gear RPM: Speed Change: Mechanical systems depend heavily on gears to transfer motion, torque, and rotational energy between components. hmsv, qard4py, xcf, qf, tewzv, jovmoj, hf6ro, gr, aakvjj, sox3p,