Electrical Engineering Calculators
Electrical engineering calculators designed for engineers, electricians, technicians, and students. Instantly calculate voltage drop, power factor, transformer sizing, motor current, wire size, and more.
Ohm's Law Calculator
Calculate V, I, R, P with any two known values. Automatic cross-calculation between all parameters.
Voltage Drop Calculator
Single-phase and three-phase circuits. Wire gauge selection and NEC compliance.
Power Factor Correction Calculator
AC circuit analysis, capacitor sizing for PF correction, multiple input modes.
AC/DC Current Calculator
Three-phase and single-phase calculations. Power-to-current and current-to-power modes.
Resistor Color Code Calculator
4, 5, and 6-band resistor support. Bidirectional calculation and tolerance info.
Transformer Turns Ratio Calculator
Step-up/step-down transformer design. Voltage, current, and turns ratio analysis.
Capacitor/Inductor Reactance Calculator
XL = 2πfL, XC = 1/(2πfC) calculations, LC resonance, unit conversions.
Series/Parallel Resistance/Capacitance Calculator
Dynamic component addition/removal. Full V, I, P analysis for resistors and capacitors.