Engineering Calculators

59 free engineering calculators for structural, fluids, machines, and electrical engineering. No signup required.

59 free tools

Beam Deflection Calculator

Calculate max deflection of simply supported and cantilever beams.

Stress Calculator

Calculate stress from force and cross-sectional area.

Strain Calculator

Calculate strain from change in length.

Young's Modulus Calculator

Calculate elastic modulus from stress and strain.

Shear Stress Calculator

Calculate shear stress in materials.

Bending Stress Calculator

Calculate bending stress in beams.

Von Mises Stress Calculator

Calculate the combined stress criterion.

Principal Stress Calculator

Calculate maximum and minimum normal stresses.

Mohr's Circle Calculator

Graphical stress analysis for principal stresses.

Factor of Safety Calculator

Calculate factor of safety from strength and stress.

Buckling Calculator

Calculate Euler's critical buckling load.

Section Modulus Calculator

Calculate section modulus for common cross-sections.

Moment of Inertia (Engineering)

Calculate second moment of area for common shapes.

Torsion Calculator

Calculate angle of twist in shafts.

Poisson's Ratio Calculator

Calculate lateral to axial strain ratio.

Bulk Modulus Calculator

Calculate resistance to uniform compression.

Shear Modulus Calculator

Calculate G = E / (2(1+v)).

Hoop Stress Calculator

Calculate stress in pressure vessels.

Thermal Stress Calculator

Calculate stress from temperature changes.

Slenderness Ratio Calculator

Calculate column classification for buckling.

Stress Concentration Factor

Calculate Kt for geometric discontinuities.

Reynolds Number Calculator

Calculate Re = density*v*D / viscosity.

Flow Rate Calculator

Calculate Q = A * v.

Bernoulli Equation Calculator

Calculate P + 0.5*rho*v2 + rho*g*h = const.

Darcy-Weisbach Calculator

Calculate head loss in pipe flow.

Hydraulic Radius Calculator

Calculate R_h = A / P for channel shapes.

Buoyancy Calculator

Calculate buoyant force = rho*g*V.

Drag Equation Calculator

Calculate F_d = 0.5*rho*v2*Cd*A.

Hydrostatic Pressure Calculator

Calculate P = rho*g*h.

Froude Number Calculator

Calculate Fr = v / sqrt(g*d).

Friction Factor Calculator

Estimate friction factor using Colebrook equation.

Pipe Volume Calculator

Calculate volume of fluid in a pipe.

Hydraulic Pressure Calculator

Calculate force using Pascal's law.

Manning's Equation Calculator

Calculate open channel flow velocity.

Darcy's Law Calculator

Calculate groundwater flow rate.

Cv Valve Flow Coefficient

Calculate valve sizing coefficient.

Hydraulic Jump Calculator

Calculate conjugate depth in hydraulic jumps.

Gear Ratio Calculator

Calculate output speed and torque from gear ratios.

Mechanical Advantage Calculator

Calculate MA for simple machines.

Spring Calculator

Calculate spring force, constant, and deflection.

Lever Calculator

Calculate balance point and force multiplication.

Pulley Calculator

Calculate force and MA for pulley systems.

Belt Length Calculator

Calculate belt length for two pulleys.

Shaft Size Calculator

Calculate minimum shaft diameter from torque.

Piston Force Calculator

Calculate force from pressure and piston area.

Power-to-Weight Ratio Calculator

Calculate power per unit weight for engines and vehicles.

Flywheel Energy Calculator

Calculate kinetic energy stored in a flywheel.

Bend Allowance Calculator

Calculate sheet metal bend allowance.

Engine Displacement (Engineering)

Calculate displacement from bore, stroke, and cylinders.

Wire Gauge Calculator

Calculate AWG from current and distance requirements.

Transformer Sizing Calculator

Calculate kVA rating for transformers.

Boost/Buck Converter Calculator

Calculate output voltage from duty cycle.

Capacitor Energy (Engineering)

Calculate E = 0.5*C*V2.

Inductor Energy Calculator

Calculate E = 0.5*L*I2.

Signal-to-Noise Ratio Calculator

Calculate SNR in dB.

Free Space Path Loss Calculator

Calculate RF propagation loss.

Fresnel Zone Calculator

Calculate Fresnel zone clearance for RF links.

Skin Depth Calculator

Calculate RF penetration depth in conductors.

VSWR Calculator

Calculate voltage standing wave ratio.