Engineering Calculators

Professional electrical tools based on NEC 2023 standards

Ohm's Law

Voltage, Current, Resistance & Power

Motor Calculator

FLA, Breaker, Wire & Overload Sizing

Transformer

kVA, Amperage & Conductor Sizing

Wire Size

Ampacity, Derating & NEC Tables

Conduit Fill

NEC Chapter 9 Fill Calculations

Voltage Drop

Single & Three Phase Analysis

Ohm's Law

V = I × R

Voltage V = I × R

Power P = V × I

V Voltage

Volts

I Current

Amps

Ω Resistance

Ohms

P Power

Watts

Calculated Results

Motor Calculator

NEC Article 430

Motor Horsepower

System Voltage

Motor Type

Motor Specifications

Transformer

NEC Article 450

Transformer kVA Rating

Primary Voltage

V

Secondary Voltage

V

Phase Configuration

Single Phase (1φ) Three Phase (3φ)

Load Current

Amps

System Voltage

V

Phase Configuration

Single Phase (1φ) Three Phase (3φ)

Transformer Specifications

Wire Size

NEC Table 310.16

Load Current

Amps

Material

Insulation

Ambient Temp

Conductors

Wire Sizing Results

Conduit Fill

NEC Chapter 9

Conduit Type

Wire Type

Conductors

0 wires

Conduit Fill Results

Voltage Drop

Branch & Feeder

Phase Configuration

Single Phase Three Phase

System Voltage

V

Load Current

A

One-Way Distance

ft

Material

Wire Size

Engineering Calculators

Ohm's Law

Motor Calculator

Transformer

Wire Size

Conduit Fill

Voltage Drop

Ohm's Law

Calculated Results

Motor Calculator

Motor Specifications

Transformer

Transformer Specifications

Wire Size

Wire Sizing Results

Conduit Fill

Conductors

Conduit Fill Results

Voltage Drop

Voltage Drop Analysis

Information