Category
Mechanical & Civil
Mechanical design, structures, fluids, power transmission, and practical civil engineering calculators.
Force, Mass, and Acceleration Calculator
Apply Newton's second law to find force and weight from mass, acceleration, and local gravity.
Work, Power, and Energy Calculator
Calculate mechanical work and average power from force, travel distance, elapsed time, and force angle.
Momentum and Impulse Calculator
Find initial and final momentum, impulse, and average force during a velocity change.
Torque, Force, and Lever Arm Calculator
Calculate torque and rotational power from force, lever-arm length, load angle, and rotational speed.
Pressure, Force, and Area Calculator
Convert force spread over an area into pressure in pascals, kilopascals, megapascals, and psi.
Density, Mass, and Volume Calculator
Calculate density and specific volume from a measured mass and occupied volume, with common unit conversions.
Volumetric Flow Rate Calculator
Calculate flow rate from transferred volume and time, then estimate velocity through a round pipe.
Heat Transfer by Conduction Calculator
Estimate steady one-dimensional heat flow through a flat layer from conductivity, area, thickness, and temperature difference.
Beam Deflection Calculator
Estimate maximum deflection and bending stress for a simply supported rectangular beam with a center point load.
Pipe Pressure Drop Calculator
Estimate Darcy-Weisbach pressure drop from flow rate, pipe diameter, length, friction factor, and fluid density.
Reynolds Number Calculator
Calculate Reynolds number and flow-regime guidance from density, velocity, characteristic length, and dynamic viscosity.
Pump Horsepower Calculator
Estimate hydraulic power and motor horsepower from flow, head, fluid density, and pump efficiency.
Bolt Torque / Preload Calculator
Estimate bolt preload from torque, nominal diameter, and nut factor, or review target torque for a desired clamp load.
Gear Ratio Calculator
Calculate gear ratio, output speed, output torque, and direction for a simple driver-driven gear pair.
Spring Rate Calculator
Estimate spring rate, deflection, stored energy, and load from force and displacement.
Cantilever Beam Stress Calculator
Estimate fixed-end bending stress and tip deflection for a rectangular cantilever beam with an end load.
Axial Stress / Strain Calculator
Estimate normal stress, elastic strain, and elongation for a straight member under axial load.
Torque / Power / RPM Calculator
Convert torque and rotational speed into shaft power, horsepower, angular speed, and work per revolution.
Hydrostatic Pressure Calculator
Calculate gauge pressure, total pressure, and pressure force at a depth in a stationary fluid.
Euler Buckling Calculator
Estimate the elastic critical load, critical stress, and slenderness ratio of an ideal compression column.