Mechanical Calculators
Last updated: September 2026
Torque and Power Calculator
Convert between torque, rotational speed, and mechanical power for motors, engines, and drivetrain components.
Shaft Power Calculator
Calculates the mechanical power transmitted through a rotating shaft given its torque and rotational speed.
Pump Head and Power Calculator
Calculate the shaft power required to drive a centrifugal pump given flow rate, static head, friction losses, and pump efficiency.
Pulley Speed Calculator
Calculates the output shaft speed of a belt-and-pulley system based on pulley diameters and input speed.
Belt Drive Length Calculator
Calculate the required belt length for open or crossed two-pulley drive systems given pulley diameters and center distance.
Pulley System Calculator
Calculate the effort force required to lift a load using fixed, movable, or compound pulley systems at a given mechanical efficiency.
Belt Drive Calculator
Calculate the driven pulley speed for a belt drive system by entering pulley diameters and the drive shaft RPM.
Pump Power Calculator
Calculate the shaft power and motor input power needed to pump a fluid against a given head.
Shaft Torque and Stress Calculator
Determine the safe torque capacity and shear stress in a rotating shaft.
Fan Airflow and Power Calculator
Calculates fan power consumption from blade swept area, rotational speed, and static pressure.
Heat Exchanger Calculator
Determine the Log Mean Temperature Difference (LMTD) and required heat transfer surface area for shell-and-tube heat exchangers.
Spring Force Calculator
Calculate the restoring force a spring exerts when compressed or stretched using Hooke's Law.
Beam Deflection Calculator
Compute the maximum mid-span deflection of a simply supported beam under a uniformly distributed load (UDL) using δ = 5wL⁴ / (384EI).
Pressure Vessel Calculator
Compute the minimum required wall thickness for a thin-walled cylindrical pressure vessel per the ASME hoop-stress formula, including a corrosion allowance.
Belt Tension Calculator
Find the tight-side tension required in a belt drive to transmit a given power at a known belt speed.
Flywheel Energy Storage Calculator
Calculates the usable kinetic energy stored in a flywheel between maximum and minimum operating speeds, accounting for system efficiency.
Belt Length Calculator
Calculate the required belt length for a two-pulley drive system using pulley diameters and center distance.
Bearing Load Calculator
Computes the equivalent dynamic load on a bearing by combining radial and axial forces with an application load factor.
Screw Torque Calculator
Calculates the torque needed to clamp a fastener to a target axial force, accounting for thread geometry and friction.
Bearing Load Capacity Calculator
Estimate the L10 bearing fatigue life in hours given the dynamic load rating, applied load, and shaft speed.
Heat Exchanger Effectiveness Calculator
Calculate the actual heat transfer rate of a heat exchanger using the effectiveness-NTU method.
Torque Calculator
Calculate the rotational force (torque) produced when a force is applied at a distance from a pivot point.
Screw Thread Calculator
Compute the tensile load capacity of a metric screw thread based on nominal diameter, pitch, material strength, and safety factor.
Fan Performance Calculator
Calculates the motor power (HP) required to drive a fan based on airflow rate, static pressure, and combined fan and motor efficiencies.
Chain Drive Calculator
Calculates the output speed of a chain drive system given sprocket tooth counts, input speed, and drive efficiency.
Shaft Torque Calculator
Determine the minimum shaft diameter needed to safely transmit a given power at a specified speed and shear stress limit.
Screw Thread Stress Calculator
Calculates the shear stress on screw threads given applied force, thread geometry, and engagement length.
Bolt Torque Calculator
Calculates the tightening torque required to achieve a target clamp load in a bolted joint, based on bolt diameter, material strength, and friction.
Hydraulic Cylinder Calculator
Calculate the output force of a hydraulic cylinder during extension or retraction from bore diameter, rod diameter, and system pressure.
Shaft Deflection Calculator
Calculates the midpoint or tip deflection of a rotating or static shaft under a transverse load, for both simply supported and cantilever configurations.
Bearing Life Calculator
Estimate how long a rolling-element bearing will last under a given load and speed.
Spring Rate Calculator
Compute the spring rate (stiffness) of a helical compression spring from its wire and coil geometry.
Rolling Bearing Life Calculator
Estimate how long a rolling bearing will last under real operating conditions.
Friction Force Calculator
Calculates the friction force resisting relative motion between two surfaces from the normal force and the coefficient of friction.
Mechanical Advantage Calculator
Calculate the mechanical advantage of any simple machine as the ratio of output force to input force.
Gear Ratio Calculator
Calculate the gear ratio between two meshing gears from their tooth counts.
Pressure Vessel Wall Thickness Calculator
Determines the minimum wall thickness required for cylindrical or spherical pressure vessels under internal pressure.