Construction Master Pro

Construction Master Pro application logo

Two in one: the official Construction Master® Pro from Calculated Industries for your iPhone and iPad includes two models: #4065 and #4080 (CM Pro with Trig). And while perhaps obvious, if you change from an iOS device to a non-iOS device, you WILL need to buy a new license as they are incompatible.

Advanced Feet-Inch-Fraction Construction-Math Calculator by Calculated Industries, built with the same features and functions, and with the same core engine that powers the industry-standard advanced construction-math calculators from Calculated Industries. You’ll actually get two apps in one, since the Construction Master Pro for iPhone has all the functionality of the Construction Master Pro and the Construction Master Pro Trig -– and includes a full User’s Guide built in, as well as the ability to press and hold a key for specific help!

Ideal for Architects, Builders, Contractors, Designers, Draftspersons, Engineers, Framers/Carpenters and Tradesmen

Need to quickly and accurately solve a construction problem when meeting with a client? Left your calculator in the truck? Just pull out your iPhone or iPad, tap on the Construction Master Pro icon, and you’ll have an answer in seconds!

• You get ALL of the functionality of the handheld Construction Master Pro and Construction Master Pro Trig calculators in one powerful, easy-to-use app.
• Solve tough construction-math problems and reduce errors on the jobsite or in the office.
• Reduce costly errors and save time and money. It will help you and your crew on every phase of your projects—estimating, bidding and building.

• Created by Calculated Industries, the originator of the award-winning Construction Master calculators
• All the functionality and solutions of the handheld Construction Master calculators and optimized for the iPhone/iPod Touch user
• Entry Editing Backspace Key – with a swipe of a finger (left - to - right)
• A complete User’s Guide in English or Spanish is available free at
• Full trigonometric function: sine, cosine, tangent, arcsine, arccosine and arctangent
• Powerful built-in solutions make it ideal for completing layouts, plans, bids and estimates
• Work in and convert between all building dimensional formats: feet-inch-fractions, inch fraction, yards, decimal feet (10ths, 100ths), decimal inches and metric (m, cm, mm)
• Built-in right angle functions simplify square-ups, rafters, slopes and more

Dimensional Math and Conversions
• Feet-Inch-Fraction, Inch Fraction, Yards
• Decimal Feet (10ths, 100ths), Decimal Inches
• Preset Fractions (1/2" through 1/64")
• D:M:S, Decimal Degree Entry and Conversions
• Full Metric Function (m, cm, mm)

Right Angle Solutions
• Complete Right Angle/Rafter Calculations
• Pitch Key (Slope and Grade)
• Rise, Run, Diagonal/Common Rafters
• Hip/Valley Key
• Jack Rafters Key
• Irregular Hip/Valley and Jacks
• Rafter Cutting Angles (Plumb, Cheek and Level Cuts)
• Stair Layout Key
• Stair (Advanced – Riser Limit, Stairwell Opening, Headroom, Floor Thickness)
• Diagonal Key
• Expanded Rake-Wall
• Arched Rake-Wall

Area and Volume Solutions
• Square and Cubic
• Roof – Bundles, Squares, 4x8 Sheets, Pitch, Plan Area
• Drywall, Siding and Paneling 4x8, 4x9 and 4x12
• Column/Cone Area and Volume
• Basic Circular Calculations
• Advanced Circular Calculations
• Weight per Volume Conversions
• Length, Width and Height Keys
• Blocks, Footings

Special Functions
• Trigonometric Function Keys: Sine, Cosine, Tangent, Arcsine, Arccosine, Arctangent
• Board Feet
• Studs: Find number On-center
• User-Definable Preferences
• Cost per Unit (total costs based on unit price)
• Equal-Sided Polygon
• Compound Miters
• Crown Angle
• Advanced Paperless Tape for all functions
• 4 Memories

Construction Master® is a registered trademark of Calculated Industries, Inc.

Construction Master Pro App Description & Overview

The applications Construction Master Pro was published in the category Utilities on 2010-05-05 and was developed by Calculated Industries. The file size is 22.14 MB. The current version is 1.5.1 and works well on 8.0 and high ios versions.

Fix to button alignment issue if app was unintentionally opened in landscape orientation on iPhone or iPod touch.

Construction Master Pro App Tips & Tricks

Construction Master Pro Reviews


Better than the actual calculator  ConcreteProdigy  5 star

I have been using this calculator for years as a concrete business owner. After breaking and losing so many of these I finally just downloaded the app and boy was I pleased. It's crisper easier to use and honestly going to save me money and heartache when I can't find my Calc. Ty for this Very satisfied customer


Everyday App  CB GC  5 star

There's no questioning this app purchase if you call yourself a builder. The very same as the physical version, why carry two things when you can't even order a pizza from your clunky construction master!!?


Perfect Calculator  Joeatree  5 star

I've used this in the field for years now. It does a great job adding inches together.


Phone is always on me with this app.  Readal  5 star

Love this as I always have my phone on me and don't have to carry another calculator all the time. Works great!!!!


Crashes  SteelyHead  1 star

It crashes.


Disappointed User of Physical Calculator and App  Stonebent  1 star

I have used the actual physical Construction Master Pro for years with no issues. It was essential to my work as a carpenter. The app has been great and in some instances superior to my original calculator. One example would be that I don't need to carry around the little instruction book because it built into the app. Now my app crashes. I needed to get a stud count for some walls and it kept giving me an error. I checked the help section to verify that I was doing it correctly. I was, so I checked the on center spacing and it said zero. Great, no problem, I will just go to preferences and set up the right spacing. Nope, it crashes every time I go into preferences. Please fix!


Stair function stopped working  Rbnjwilliams  2 star

Tried deleting and reinstalling to see if it would reset stair function but it won't let me reinstall...


Crashing  Disappointed18374  5 star

Hit reset


App Crash  Ttucker68  4 star

With new iOS, app crashes when I go to preferences.


????  Levimatron  1 star

App won't open. Had this app for years with no problem. Very disappointed


Amazing  Evaca  5 star

I feel like I'm cheating! The greatest tool I own .. Its easy enough. Useful examples included. Well done *****

Pickup problems

Too damn good!  Pickup problems  5 star

If your a chippy you must have this, I would have paid $100. It's that good I almost didn't want to tell anyone about it, but I thought I owed it to the makers



CALCULATED INDUSTRIES Construction Master Pro 4065 v3.0 Calculator MANUAL Nice! #calculatedindustries…


mook mook1971 3 star

@_VINTAGEJEWELRY: CALCULATED INDUSTRIES Construction Master Pro 4065 v3.0 Calculator MANUAL Nice! #calculatedindustries …


shane coloradoquality 3 star

@_VINTAGEJEWELRY: CALCULATED INDUSTRIES Construction Master Pro 4065 v3.0 Calculator MANUAL Nice! #calculatedindustries …


The best  rberry61  5 star

This is by far the best app I have on my phone! Better than the actual $80 calculator. Love it


Awsome app!  Package719  5 star

Perfect for anyone in construction. I use this app every day. These calculators are expensive, can't believe I got it for 10 bucks!


Not the same  Mombo427  4 star

I have a handheld that I have used for years. I should have looked at this screen more closely before I downloaded this. We constantly have to convert inches to millimeters and my handheld has a button for both mm and cm. This one does not so just pay attention to what type of calculation you need to do if you are used to using the original. Otherwise it looks like a good unit for most other things.

ST Williams

Full Featured app. This is the one.  ST Williams  5 star

I have used the handheld device from Calculated Industries for years and this app is perfect. Various conversions, stairs and standard calculations all on your phone. Check out their web site for other versions and compare to meet your needs.


Great product  MrRelo  5 star

Fantastic product, just like the calc I used to carry all the time. Would be great if they would develop Electric Calc Pro for iPhone to have everything on one device.


Love this one  Chainfall  5 star



Saved me money  Jonrulesheppner  5 star

I need to buy a Constriction master pro for my union apprenticeship classes. Found this app saved me money. As all the keys are the same except for the setting witch are much easier to use. Thanks CM


iPad version  1j2k3h  4 star

Asked them 2 years ago and a rep said iPad version on the way soon with free upgrade if I purchased the standard one. Obvious she was telling me what I wanted to hear. Never happened. But the app itself is good.


What you need if you know what you're doing  Redwood329  5 star

Same calculator I have used for years, just cheaper thanks CI.


Best Construction Cal in the app store!!!!!  abab79peach  5 star

This iPhone version is better than the hard copy! If you want a construction calculator at your fingertips this is the one..... I tried them all in the app store thanks calculated industries! For you guys that are complaining about the price, why don't you go buy one at home depot for 50+ dollars and stop giving bad ratings.....

Construction Master Pro Comments

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