10 calculators

Electrical Calculators

Professional electrical calculators for voltage drop, wire sizing, conduit fill, ampacity, and more. Based on NEC 2023 standards.

Voltage Drop Calculator

Calculate voltage drop in electrical circuits based on wire gauge, length, and load current per NEC standards.

Determine the correct AWG wire gauge based on current, voltage drop limits, and distance per NEC Table 310.16.

Calculate conduit fill percentage based on wire count and sizes per NEC Chapter 9 Table 1.

Determine wire ampacity based on NEC Table 310.16 with temperature and conduit fill correction factors.

Calculate total electrical load for residential or commercial buildings per NEC Article 220.

Determine the correct circuit breaker size based on wire gauge and load current per NEC 240.6.

Calculate the required transformer kVA rating based on load requirements.

Calculate power factor, real power, reactive power, and apparent power for AC circuits.

Calculate voltage, current, resistance, or power using Ohm's Law (V=IR) and the power formula (P=VI).

Calculate the total resistance of a wire run based on gauge, length, and material per NEC Table 9.