# WireSize: Voltage Drop, AWG — Conduit Fill, Box Fill, NEC

> Conduit Fill, Box Fill, NEC (iPhone/iPad app by ZHENGQIAO JIANG.)

- Source: https://appshunter.io/ios/app/wiresize-voltage-drop-awg/id6772919484 (this page in markdown: same URL + `.md`)
- Developer: [ZHENGQIAO JIANG](https://appshunter.io/developer/1892168889)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: English, French, German, Japanese, Korean
- Released: 2026-05-27
- Data updated: 2026-08-14
- User reviews in markdown: https://appshunter.io/ios/app/wiresize-voltage-drop-awg/id6772919484/reviews.md

## What is WireSize?

Tired of flipping through code books on the job? WireSize turns conductor
and circuit questions into instant, accurate answers.

Here's how it works: pick a calculator, enter your numbers, and read the
result. Done. No accounts. No uploads. No tracking. Every calculation runs
entirely on your iPhone.

Whether you're sizing a feeder, checking a panel install, or studying for a
license exam, WireSize is built to be the fastest way to get a number you
can trust.

Start with voltage drop in volts and percentage, for single-phase and
three-phase circuits. Reverse it to find the minimum wire gauge for a target
drop, or the longest run a gauge will allow. Check conductor ampacity with
ambient-temperature and conductor-count derating, capped at the terminal
rating. Size conduit fill for EMT, IMC, RMC, PVC and more — get a pass or
fail instantly, or the smallest conduit that works. Calculate box fill
volume for conductors, devices, clamps and grounds. Lay out conduit bends
with offset, saddle and stub-up math.

It goes further: circuit breaker and overcurrent sizing, equipment grounding
conductor sizing, an Ohm's Law power wheel, single and three-phase power,
kVA to amps, motor full-load current, transformer sizing, power-factor
correction, AWG to mm2 conversion, resistor color codes and NEMA receptacle
references.

Every calculation is built on published electrical standards and verified
against known reference values. Save any result, organize it by job site,
and share it as a PDF for documentation or inspection prep.

No ads. No data collection. No internet required. Just the calculations,
fast.

3-day free trial, then $1.99/week. Cancel anytime.

Terms of Use: https://taxlite.net/wire_size/terms.html
Privacy Policy: https://taxlite.net/wire_size/privacy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $4.99 | per month |
| Yearly | $29.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $79.99 | one-time |



## Version history (last 2 releases)

### 1.1.0 — 2026-08-04

New in 1.1.0:

• Dwelling load calculation — NEC 220.82 Optional Method and Standard Method, with a suggested standard service size
• Cable tray fill calculator for multiconductor cable (NEC 392.22)
• Wire pulling tension calculator with sidewall pressure check
• Rolling offset and kick added to conduit bending
• Parallel resistance calculator
• Delta-Y conversion for three-phase resistance and voltage
• Wire color code reference by voltage system
• Voltage drop now links directly to the ampacity correction calculator
• Renamed "Breaker/OCPD Sizing" to "Breaker / Fuse (OCPD) Sizing" for clarity

Thanks for using WireSize — keep the feedback coming!

### 1.0 — 2026-05-27

No release notes.

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All apps by ZHENGQIAO JIANG: https://appshunter.io/developer/1892168889

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*