Gear Ratio Calculator
Calculate overall drive ratio, RPM, and theoretical speed.
Free ToolDrivetrain Calculators
Calculate gear ratios, RPM at speed, axle changes, torque-converter slip, and drivetrain losses.
Differential Ratio Calculator
Calculate axle ratio from tire and RPM data.
Free ToolRegear Calculator
Choose a new axle ratio after changing tire size.
Free ToolRPM at Speed Calculator
Calculate engine RPM from speed, gearing, and tire size.
Free ToolTransmission Gear Speed Calculator
Map RPM and redline speed across up to six transmission gears.
Free ToolWheel Torque Calculator
Estimate total wheel torque after gearing and losses, with optional tractive force.
Free ToolTorque Converter Slip Calculator
Estimate converter slip from engine and vehicle speed.
Free Tool