Mechanical Engineering
Mechanical engineering calculators for shaft design, gear ratios, bearings, springs, pressure vessels, and thermal analysis.
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Shaft Design Calculator
Design a shaft for combined bending and torsional loads using the von Mises failure criterion. Calculates minimum diameter and stresses.
Gear Ratio Calculator
Calculate gear ratio, output speed, output torque, and mechanical advantage for a simple gear pair.
Belt Drive Design Calculator
Design V-belt or flat belt drives. Calculate belt length, speed ratio, belt speed, and tight/slack side tensions for power transmission.
Spring Design Calculator
Design helical compression springs. Calculate spring rate, deflection, shear stress with Wahl correction, and free/solid lengths.
Bearing Life Calculator
Calculate L10 bearing life in revolutions and hours using the ISO 281 basic rating life equation for ball and roller bearings.
Thermal Expansion Calculator
Calculate linear thermal expansion, thermal strain, and restrained thermal stress for engineering materials subjected to temperature changes.
Heat Exchanger Sizing Calculator
Size a counterflow heat exchanger using the LMTD method. Calculate heat duty, log mean temperature difference, and required surface area.
Pump Sizing Calculator
Size a centrifugal pump by calculating hydraulic horsepower, brake horsepower, motor size, NPSH required, and annual energy cost.
Fan Selection Calculator
Select an HVAC or industrial fan by calculating brake horsepower, motor size, estimated tip speed, noise level, and annual energy consumption.
Pressure Vessel Design Calculator
Design cylindrical pressure vessels per ASME Section VIII. Calculate minimum wall thickness, hoop stress, and longitudinal stress.
Fatigue Life Calculator
Estimate fatigue life in cycles using the S-N approach with modified endurance limit. Accounts for surface finish and size effects.
Weld Strength Calculator
Calculate weld strength for fillet and groove welds per AISC. Determine effective area, allowable load, and shear capacity with directional effects.
Bolt Torque Calculator
Calculate required bolt tightening torque to achieve a desired clamping force using the T = K×D×F short-form torque equation.
Flywheel Energy Calculator
Calculate kinetic energy stored in a flywheel. Determine moment of inertia, angular velocity, and energy in ft·lb, Joules, and Wh.
Vibration Analysis Calculator
Analyze single-degree-of-freedom vibration systems. Calculate natural frequency, damping ratio, transmissibility, and amplitude magnification.
Hydraulic Cylinder Force Calculator
Calculate extend and retract forces for hydraulic cylinders based on bore diameter, rod diameter, and system pressure.
Pneumatic System Calculator
Size a pneumatic compressed air system. Calculate total CFM demand, compressor horsepower, and tank recharge time for multiple air tools.
Power Screw Calculator
Analyze power screws (lead screws, jack screws). Calculate raising and lowering torque, efficiency, and self-locking condition.
Keyway Design Calculator
Design shaft keyways by calculating shear and compressive stresses in the key. Determine minimum key length and safety factor.
Coupling Selection Calculator
Select a shaft coupling by calculating design torque with service factor, required rating, and recommended coupling type based on misalignment.