iPhone Screenshots


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.

What's New

Version 2.3.7

Added TracStar™ 630, TracStar™ 1200, Talon™ 2000, Acrobat™ 250HF, 315, and 630, and Polygon™ fusion machines. Updated WIS 4-32-08:2016 Issue 4 (UK Water) polyethylene fusion specification.

Ratings and Reviews

4.6 out of 5
5 Ratings
5 Ratings

Good but needs updated


Good app but needs updated, luckily works. Pipe specifications need updated

McElroy calculator


Good tool, easy to use. Interface pressure could be a drop-down menu by machine and color cylinder instead of entering a number.
On other option could be a option for dissimilar wall thickness

Great product

Bill fleet

A very quick and accurate way to calculate fusion pressure on the fly. Much quicker than the slide rule and much more accurate.


McElroy Manufacturing, Inc.
2.7 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Portuguese, Spanish
Age Rating
Rated 4+
© McElroy Manufacturing, Inc.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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