Gear Ratio Rpm Speed Calculator

Enter diff gear ratios and tire diameter then drag rpm slider to calculate speed from rpm.

Gear ratio rpm speed calculator. Use this calculator to determine your gear ratio and vehicle s speed in any gear and any engine rpm for best performance. Engine rpm calculation basics. In this article we will discuss how to calculate gear ratio speed and torque for various gear train. Engine rpm or the speed at which the engine turns can be calculated at any speed given the vehicle s tire size axle ratio and final transmission gear ratio.

Gear ratio is the ratio of output and input number of teeth on a shaft. Gear train consist of gears in series. Automatic transmission in drive. Automatic transmission in overdrive.

Enter shift at rpm select gear to shift to and hit shift and trace to run up through the gears recording shift point rpm and km h. You may not be sure of the type of transmission you are currently using. Scroll through the list of popular transmissions to find yours. In order to calculate the engine rpm based on ring gear and pinion gear ratio speed and tire height this calculator makes the following assumptions.

This calculator assumes you know the vehicle s transmission ratio. Use the rpm calculator to determine what rpm your engine will run based on gear ratio tire diameter transmission and mph. The results will then be. Or change input variables engine rpm axle gear ratio and tire height to determine vehicle speed in each forward gear.

Drag max rpm slider to adjust the range of the rpm and km h gauges. They are used to increase or decrease the speed or torque of the output shaft. If you know any 3 values pulley sizes or rpm and need to calculate the 4th enter the 3 known values and hit calculate to find the missing value. This calculator will provide the speed of the vehicle based on the transmission gear ratio the engine rpm the tire height and the ring gear and pinion gear ratio in the rear end axle differential housing.

Rpm mph from gear ratio calculator by wallace racing home of pontiac powered firebirds trans ams pontiac powered dragsters pontiac power rules. This calculation is used to match oversize tires with new ring and pinion gears to obtain the desired engine rpm at highway speed. You can try various combinations to come up with an appropriate combination of ring and pinion gear ratio and tire diameter for your vehicle.