Southwire® Voltage Drop Calc

Name: Southwire® Voltage Drop Calc
Rating: 4.6 (1456 reviews)
Author: Southwire Company

By: Southwire Company

Southwire Calculator

Features & Capabilities

Southwire's Voltage Drop Calc helps electricians and engineers size conductors for electrical circuits by evaluating voltage drop against specified limits and NEC ampacity. It is designed for AWG and KCMIL sizes.

It can size conductors to meet a target voltage drop or calculate voltage drop for a specific conductor run, with NEC ampacity limits applied.

User Growth & Download Statistics

App Education Programming Developer Tools Open Source

By:

Southwire Company

Rating:

4.60

(1,456) 2 new ratings

Version:

3.2.3 Last updated: 2025-07-24

Version code:

876654143

Creation date:

2011-06-02

Compatible devices:

Size:

10.47MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 49,375 ▼ 22

Other platforms

Southwire® Conduit Fill Calc (v2.4.1)

184,993 4.04

(366)

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Southwire Company

Apple Apps Store

https://apps.apple.com/us/app/southwire-voltage-drop-calc/id440338420

Website:

http://www.southwire.com/apps

User Reviews

Users praise the app as a handy on-site wire-sizing tool with AC/DC options and easy field reference, saving time. However, reliability is a major concern, with many reports of crashes or the app not working after updates. Calculation/output gaps, unclear ampacity details, and limited metric support are common complaints. Usability issues also appear. Overall, it's valuable when functioning but unreliable and sometimes confusing to use.

Pros

On-site field sizing tool that lets electricians quickly determine wire sizes in the field.
Supports both AC and DC options (including solar, battery storage, and automotive voltages).
Easy to use and serves as a quick reference, saving time on the job.
Portable, professional-grade tool that many users rely on daily.
Provides a safe, reliable reference on a mobile device with ready access to data.

Cons

App frequently becomes unusable due to crashes, frozen screens, or being non-responsive after updates.
Calculation/output issues, such as missing results, unclear ampacity outputs, or inability to input starting current for motor starts.
Usability and wording problems, including confusion about inputs and limited options or features.
Poor or incomplete metric support (metric vs imperial) and lack of metric cable sizes.
Some reviews report inconsistent performance (e.g., 'does not work' or 'not functioning' for certain versions).

Recent reviews

I’ve used this app for many projects over the years. Love that it has AC and DC options. Used it for regular line voltage, but also solar 400v dc, battery storage 48v dc and automotive 12v dc.

by th*****, 2025-07-09

I use this app so often. It is a great reference tool.

by Jo*****, 2025-02-18

Motors have minimum starting voltage drop to 90% of the motors nameplate voltage. The program does not allow inputting a starting current to calculate the starting Voltage drop.