Engineering

Calculate voltage, current, resistance, and power consumption with energy cost estimation.

Solve for voltage, current, resistance, or power — enter any two known values.

Calculate beam deflection, bending moment, and reactions for simply supported and cantilever beams.

Calculate capacitor charge, energy, reactance, and RC time constant.

Calculate concrete volume and cement bags for slabs, columns, cylinders, and footings.

Calculate cement, sand, aggregate and water quantities for concrete.

Calculate velocity, Reynolds number, and head loss using Darcy-Weisbach equation.

Calculate heat flux through a thermal resistance.

Calculate the correct current-limiting resistor for your LED circuit.

Calculate power factor, kVA, kVAR, and correction capacitor for AC electrical systems.

Decode 4-band and 5-band resistor color codes to find resistance value and tolerance.

Calculate area and perimeter for rectangles, circles, and triangles in m² and ft².

Solve for torque from force and distance, or vice versa using τ = F × r.

Calculate transformer turns ratio, secondary current, power, and efficiency.

Calculate voltage drop in electrical cables for single-phase circuits per NEC guidelines.

Calculate wire resistance, voltage drop, and ampacity for AWG/mm² sizes.

Find the gain (dBi), beamwidth and effective aperture of a dish antenna.

Calculate maximum bending stress, safety factor, and material utilization from bending moment and section modulus.

Calculate the physical length of a half-wave dipole, quarter-wave monopole or full-wave loop.

Compute radio path loss and a simple link budget from frequency and distance.

Calculate hydraulic, shaft, and electrical input power for a centrifugal pump.

Convert between frequency, wavelength and period for electromagnetic or acoustic waves.

Calculate weight of steel bars, rebars, pipes, and plates in kg and lb.