Gear Ratio Calculator: Mechanical Advantage Explained
A gear ratio is the relationship between the number of teeth on two meshing gears. It determines how speed and torque are transmitted through a mechanical system. Understanding gear ratios is essential for designing transmissions, drivetrains, robotics, and any mechanism involving rotational motion transfer.
Formula & Calculation
Gear Ratio = Driven Teeth ÷ Driver Teeth. Example: A 60-tooth driven gear meshing with a 20-tooth driver gear produces a ratio of 3:1. This means the driven gear rotates once for every 3 rotations of the driver gear, resulting in speed reduction and torque multiplication.
Applications
Automotive: Transmissions use multiple gear ratios for acceleration and fuel efficiency. Bicycles: Different gear combinations optimize pedaling for terrain. Robotics: Precise speed and torque control for motors. Manufacturing: Conveyor systems and machinery timing. A ratio > 1 reduces speed but increases torque; a ratio < 1 (overdrive) increases speed but reduces torque.