Mechanical & Civil

Mechanical design, structures, fluids, power transmission, and practical civil engineering calculators.

Beam Deflection Calculator

Estimate maximum deflection and bending stress for a simply supported rectangular beam with a center point load.

Estimate Darcy-Weisbach pressure drop from flow rate, pipe diameter, length, friction factor, and fluid density.

Calculate Reynolds number and flow-regime guidance from density, velocity, characteristic length, and dynamic viscosity.

Estimate hydraulic power and motor horsepower from flow, head, fluid density, and pump efficiency.

Estimate bolt preload from torque, nominal diameter, and nut factor, or review target torque for a desired clamp load.

Calculate gear ratio, output speed, output torque, and direction for a simple driver-driven gear pair.

Estimate spring rate, deflection, stored energy, and load from force and displacement.

Estimate fixed-end bending stress and tip deflection for a rectangular cantilever beam with an end load.