Best Cable Sizing Apps

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Free

VFD Cable Sizing Calc by Southwire Company

Strong Contender

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Free

Cable Calc+ by Megger

Worth Considering

Calculate single and three-phase radial circuitsCalculate single-phase ring final circuitsBased on BS 7671 standards

4.0(2 ratings)

Free

This tool assists electrical contractors by calculating cable selection and voltage drop for installations up to 25KW and 100A. It supports various cable types and includes reference methods, educational videos, and a guide to electrical test instruments.

More Cable Sizing apps to explore

Cable Calc

Cable Size Calculator

$14.99

Calculate the minimum required cable size for single and three-phase circuits based on BS 7671 standards. Input design criteria, installation methods, and environmental factors to determine appropriate cable dimensions. Save or print detailed results for your projects.

Size the cable in seconds

🎨 Graphics & Design

by Unique Computer Systems LLC

Cable Size Calculator

Offline operationVoltage drop calculationSupports copper and aluminum cables

This tool helps electrical professionals quickly determine the correct cable sizes for electric circuits. It calculates voltage drop and supports various cable types, working offline for convenience on job sites.

📊 Productivity

(2)

free

DC Power Cable Size Calc

DC Power System Cable Size

$2.99

This utility calculates the appropriate wire gauge for DC power systems based on length, voltage, and current. It helps prevent voltage drops, overheating, and wasted energy by ensuring correct cable sizing for applications like solar panels and battery systems.

Instant wire gauge calculationCopyable resultsIncludes reference formulas

Voltage Drop & Conduit Fill

(3)

paid

WireCalc - Wire Sizing

$7.99

CableCalc BS7671 Lite

by Castline Systems

Ring, radial, and lighting circuit calculationsCurrent carrying capacity checksVolt drop calculations

This app calculates electrical circuits, including current carrying capacity, volt drop, and correction factors for PVC cable. It provides a detailed summary of checks for ring, radial, and lighting circuits.

by FINOLEX CABLES LIMITED

💼 Business

Electrical Calculations

Cable sizing & capacity

Wire size and voltage drop calculationsPower, current, and resistance calculationsMotor performance and connection diagrams

This app provides a comprehensive suite of electrical calculations for professionals. It supports various international standards and offers detailed reports in PDF format. The tool covers wiring, power, motor, and electronic calculations, along with extensive conversion tables and resources.

📊 Productivity

(126)

free with in-app purchases

DC Wire Sizer

Easy Wire Sizing Calculator!

$2.99

Calculate appropriate DC wire sizes for electrical projects, preventing equipment damage and fires. Save, edit, and export wire run details for electrical plans and material purchases. Features a wizard for easy sizing for all users.

Calculates wire size, voltage drop, and ampacitySupports custom DC voltages up to 500 ampsSave, edit, and export wire run details

Building Wire Reliability Calc

(23)

paid

This tool helps determine the maximum allowable lengths for twisted-pair copper patch and horizontal cables in compliant Category 5e, 6, or 6A channels. It allows users to define cables, create multi-cable channels, and validates configurations, providing guidance on length adjustments.

Define cable type, category, gauge, and lengthCreate single or multi-cable channelsValidate channel configurations

Fiber Optic color code lookup.

$1.99

Wire Gauge Calculator: Cable

12V Electric System Planner

This tool assists professionals in selecting the optimal cabling solution for their projects. It calculates the best cross-section, offers money and CO2 saving advice, and provides access to technical documentation and industry news.

Optimal cross-section calculationMoney and CO2 saving adviceAccess to technical documentation

(2)

ad-supported

Pump Cable Calculator

Southwire®

Wire size calculationInstallation length calculationSupports various installation methods

This app helps determine the correct wire size or installation length for pump cables, adhering to NEC® guidelines. It supports various installation methods for electrical projects.

🔍 Reference

(7)

free

Cable Voltage Drop2026

Offline cable sizing tool

$0.29

Cable Guide: DIY & Pinouts

DIY & buy guide for cables

🔍 Reference