Professional Tools

Wire & Cable Calculation Tools

Professional-grade electrical calculation tools for wire sizing, voltage drop, ampacity, and more.Free, accurate, and easy to use.

Primary Tool

Calculate the correct wire gauge (AWG) based on current, voltage, and wire length. Supports both copper and aluminum wires.

Complete American Wire Gauge (AWG) reference chart with wire diameter, resistance, and ampacity ratings.

Calculate voltage drop in electrical circuits. Essential for ensuring proper wire sizing and electrical code compliance.

Determine the maximum current carrying capacity (ampacity) for different wire gauges and installation methods.

Calculate electrical resistance of wire based on gauge, length, material, and temperature.

Comprehensive cable sizing tool for residential, commercial, and industrial applications.

All our calculators use industry-standard formulas and are regularly updated to comply with the latest NEC (National Electrical Code) requirements.

Simple, intuitive interfaces designed for both professionals and DIY enthusiasts. Get instant results with step-by-step calculations.

From basic wire gauge calculations to advanced cable sizing, our tool collection covers all your electrical engineering needs.

All tools are completely free to use with no registration required. Access professional-grade calculators anytime, anywhere.

Residential Wiring

Commercial Systems

Industrial Power

Automotive Harnesses

Solar Installations

Marine Systems

RV & Mobile Homes

DIY Projects