Electrical Calculators

Calculates voltage drop, load voltage, and NEC compliance for copper and aluminum wire runs.

Calculates recommended wire gauge, ampacity, and voltage drop for any circuit load and run length.

Calculates conduit fill percentage and NEC compliance for any combination of wire gauges and conduit types.

Converts watts to amps or amps to watts for DC, single-phase, and three-phase AC circuits, with kVA and wire gauge.

Calculates total resistance, current, and power dissipation for parallel and series resistor circuits.

Calculates output voltage, load effect, current, and power dissipation for any voltage divider circuit.

Estimates fixture count, grid spacing, total wattage, and circuit breaker size for any room.