Mechanical Engineering calculators
Torque, power, speed, gears and other machine fundamentals.
Belt & Pulley CalculatorDriven pulley speed, ratio, belt speed and belt length for a two-pulley drive.Mechanical EngineeringBolt Tightening Torque EstimatorTightening torque from preload (T = K·F·d), preload from torque, or a preload target from proof strength.Mechanical EngineeringGear Ratio CalculatorGear ratio from teeth or speeds, with output speed, torque and direction for a gear pair.Mechanical EngineeringHydraulic Cylinder Force CalculatorPush and pull force of a hydraulic or pneumatic cylinder from bore, rod and pressure.Mechanical EngineeringMechanical Power & Work CalculatorPower from force and speed, from work and time, or for lifting a load.Mechanical EngineeringParallel Key Length EstimatorMinimum parallel-key length for shear and crushing, or the stresses in a given key.Mechanical EngineeringPipe Flow Rate & Velocity CalculatorFlow rate from average velocity and pipe inside diameter, or velocity from flow rate.Mechanical EngineeringPressure & Hydrostatic Pressure CalculatorPressure from force over an area, or gauge and absolute pressure at a depth in a still liquid.Mechanical EngineeringRolling Bearing Life Calculator (L10)Basic rating life L10 in revolutions and hours for ball or roller bearings, with reliability factor.Mechanical EngineeringShaft Torsional Stress CalculatorTorsional shear stress and angle of twist of a round shaft, or the diameter needed.Mechanical EngineeringSpring Rate Calculator (Hooke’s Law)Spring rate, force or deflection using Hooke’s law — plus stored energy.Mechanical EngineeringTorque & Shaft Power CalculatorTorque from force × lever arm or from power and speed, and shaft power from torque and speed.Mechanical Engineering