# Transformer Calc 2

> Electrical transformer sizing and construction math calculator for electricians. (iPhone/iPad app by Snappy Appz Inc..)

- Source: https://appshunter.io/ios/app/transformer-calc-2/id1597015791 (this page in markdown: same URL + `.md`)
- Developer: [Snappy Appz Inc.](https://appshunter.io/developer/375591377)
- Category: Utilities, Productivity
- Price: $3.99 (on sale, was $4.99)
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 16 MB
- Languages: American English
- Released: 2021-11-30
- Data updated: 2026-06-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/transformer-calc-2/id1597015791/reviews.md

## What is Transformer Calc 2?

The essential tool for electricians. Now updated for 2024 CEC and 2023 NEC. Instant transformer sizing and advanced construction math in one app.

Description

Simplify your electrical calculations with Transformer Calculator 2.

Designed for professional electricians, electrical engineers, and apprentices, Transformer Calculator 2 eliminates the guesswork from complex electrical math. Whether you are sizing a new install or verifying an existing setup, this app provides instant, code-compliant results for both US (NEC 2023) and Canadian (CEC 2024) standards.

KEY FEATURES:

DUAL CODE COMPLIANCE

Toggle Instantly: Seamlessly switch between the 2024 CEC (Canada) and 2023 NEC (USA) with a single tap in settings.

Localized Standards: The app automatically adjusts wire types, ampacities, and conduit fill rules based on your selected code.

COMPREHENSIVE TRANSFORMER SIZING

Input Flexibility: Simply enter your KVA, primary and secondary voltages, and configuration (Delta or Wye).

Instant Results: Get immediate calculations for Full Load Amps (FLA), Overcurrent Protection (Fuse or Breaker), and Bonding.

Wire and Conduit: Automatically sizes your Primary and Secondary wires (minimum size and ampacity) and Conduits (minimum pipe size and fill) based on the latest tables.

ADVANCED CONSTRUCTION CALCULATOR

Fractional Math: Built-in construction calculator that handles feet, inches, and fractions (1/16, 1/8, etc.) with ease.

Unit Conversion: Quickly convert between metric and imperial or different unit scales.

Volume and Area: Perform complex dimensional calculations right on the job site.

PROFESSIONAL AND CUSTOMIZABLE

Detailed References: Extensive database of wire types (THHN, THW, XHHW, etc.) and conduit types (EMT, ENT, Rigid PVC, etc.).

Dark Mode: Fully supports system Dark Mode and tinted icons for comfortable viewing in low-light job sites.

Custom Settings: Set your default wire types, temperature ratings (60, 75, or 90 degrees C), and precision preferences to match your daily workflow.

Stop flipping through code books for every calculation. Download Transformer Calculator 2 today and carry the code in your pocket.

## Key features

- Dual code compliance (NEC 2023, CEC 2024)
- Instant transformer sizing
- Wire and conduit sizing
- Overcurrent protection calculation
- Fractional construction calculator
- Unit conversion
- Dark mode support

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/transformer-calc-2/id1597015791/reviews.md

### 1/5 — Doesn’t work.

*2023-01-22*

App asks to select wire insulation. Regardless of which insulation you select, it will ask you to select a different insulation. Shows 1/2” conduit and 18awg wire for a 3000kva transformer with a 480v secondary. Save your money.

## Frequently asked questions about Transformer Calc 2

### What electrical codes does Transformer Calc 2 support?

Transformer Calc 2 supports both the 2024 Canadian Electrical Code (CEC) and the 2023 National Electrical Code (NEC) for the USA. You can seamlessly switch between these standards within the app's settings.

### How does Transformer Calc 2 help with transformer sizing?

You can input your transformer's KVA, primary and secondary voltages, and configuration (Delta or Wye). The app then instantly calculates Full Load Amps (FLA), appropriate Overcurrent Protection (fuse or breaker), and Bonding requirements.

### Can Transformer Calc 2 size wires and conduits?

Yes, the app automatically sizes primary and secondary wires, determining minimum size and ampacity based on the selected code. It also calculates minimum conduit pipe size and fill percentages.

### What kind of construction math can Transformer Calc 2 perform?

Transformer Calc 2 includes a built-in construction calculator that handles fractional math with ease, including feet, inches, and fractions like 1/16 and 1/8. It also performs unit conversions and complex dimensional calculations for volume and area.

### Is Transformer Calc 2 customizable for my workflow?

Yes, you can customize settings such as default wire types (THHN, THW, XHHW, etc.), temperature ratings (60, 75, or 90 degrees C), and precision preferences to match your daily work.

### Does Transformer Calc 2 have ads?

No, Transformer Calc 2 does not contain advertisements. It is a paid application designed for professional use without interruptions.

### What devices is Transformer Calc 2 available on?

Transformer Calc 2 is available for iPhone and iPad devices. It supports dark mode for comfortable viewing in various lighting conditions.

### How often is Transformer Calc 2 updated?

The app was last updated on January 27, 2026, indicating ongoing support and potential for future code updates. The latest version is 1.2.1.

## Version history (last 5 releases)

### 1.2.1 — 2026-01-27

- Fixed issue with pipe size not updating properly.

### 1.2.0 — 2026-01-26

- Updated to 2024 CEC.
- Updated to 2023 NEC.
- Enhanced dark mode.
- Update sheet added.

### 1.1.0 — 2024-06-17

- Updated dark mode throughout.
- Updated to full support of iOS 17.

### 1.0.5 — 2022-05-09

- Fixed wire sizing to better reflect latest code rules.
- Fixed wire size not properly updating on spec. changes.

### 1.0.3 — 2022-03-18

- Fixed issue with cloud data persistence.

## Apps similar to Transformer Calc 2

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Aptos End User](https://appshunter.io/ios/app/aptos-end-user/id1589749162) | 3.5 (2) | Free | Utilities |
| [NX Connect](https://appshunter.io/ios/app/nx-connect/id1640184713) | 3.0 (1) | Free | Utilities |
| [Partial Reel Calculator](https://appshunter.io/ios/app/partial-reel-calculator/id489177969) | 2.5 (11) | Free | Utilities |
| [Conduit Fill](https://appshunter.io/ios/app/conduit-fill/id6469908455) | 4.5 (2) | $4.99 | Utilities |
| [Switch-Pros](https://appshunter.io/ios/app/switch-pros/id1658883630) | 3.9 (22) | Free | Utilities |
| [DLM Config](https://appshunter.io/ios/app/dlm-config/id1321013394) | — | Free | Utilities |

## More apps by Snappy Appz Inc.

- [Electrical Calc](https://appshunter.io/ios/app/electrical-calc/id375591374)
- [Construction Calc Lite](https://appshunter.io/ios/app/construction-calc-lite/id380648615)
- [Electrical Calc USA](https://appshunter.io/ios/app/electrical-calc-usa/id391412994)
- [Construction Calc Pro](https://appshunter.io/ios/app/construction-calc-pro/id458909118)
- [The Best No Smoking App](https://appshunter.io/ios/app/the-best-no-smoking-app/id458916516)
- [Electrical Calc Pro](https://appshunter.io/ios/app/electrical-calc-pro/id514793318)

All apps by Snappy Appz Inc.: https://appshunter.io/developer/375591377

---

*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 2026-06-01.*