# McCalc Fusion Calculator

> HDPE/PP Pressure Calculator

Canonical page: [https://chrome-stats.com/d/id376891708](https://chrome-stats.com/d/id376891708)

## Overview

- **ID:** `id376891708`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** McElroy Manufacturing, Inc.
- **Category:** Business
- **Rating:** 3.40 / 5 (18 ratings)
- **Version:** 3.1.0
- **Last updated:** 2026-01-12
- **First published:** 2010-06-15
- **Size:** 3.97 MB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/mccalc-fusion-calculator/id376891708)
- **Website:** [https://www.mcelroy.com/mccalc.htm](https://www.mcelroy.com/mccalc.htm)
- **Privacy policy:** [https://www.mcelroy.com/en/privacypolicy.htm](https://www.mcelroy.com/en/privacypolicy.htm)

## Description

The McCalc Fusion Pressure Calculator is designed to help you quickly find the correct fusion pressure for your job.

To properly heat-fuse polyethylene pipe, the fusion pressure must be adjusted so the pipe manufacturer's recommended interfacial pressure is achieved.

McCalc takes the guesswork out of HDPE and Polypropylene pipe fusion.  By selecting your McElroy fusion machine and entering your pipe size and pressure requirements, the recommended theoretical gauge pressure may be calculated.

McCalc offers the following features:

- Easy selection of any of McElroy's hydraulic fusion machines.
- Selection from nine different international standards for HDPE and Polypropylene pipe fusion.
- Pipe size entry in IPS, DIPS, O.D., or JIS units.
- Wall thickness entry using the pipe's dimensional ratio or actual wall thickness.
- Interfacial pressure and drag pressure entry in units of psi, bar, kg/cm², or MPa.
- Multiple-language support including English, Spanish, and Portuguese.

## Rankings

- #293,597 — Overall

## Review summary

Users praise the app for being easy to use and for quick, accurate fusion pressure calculations, and view it as a useful tool for professionals. However, several reviews repeatedly cite crashes and instability, readability issues from dark UI themes, and compatibility problems on older iPhones. A few also note input not saving or UI changes after updates. Overall, it’s valued when functioning, but reliability, readability, and device compatibility need improvement.

### Pros

- Easy to use and intuitive interface (noted across multiple reviews).
- Fast and accurate fusion pressure calculations.
- Described as a good tool for fusion professionals / valuable when working

### Cons

- Crashes and instability are frequent across reviews.
- Readability and visibility issues due to dark themes/low color contrast.
- Compatibility problems on older iPhone models (e.g., iPhone 5s/5c) after updates

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Source: [Chrome-Stats](https://chrome-stats.com/d/id376891708)