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Construction Master Pro App
Model 4125/4127
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[+] Overview

Construction Master Power and Versatility - On Your Smartphone or Tablet

  • ALL of the functionality of your Construction Master Pro calculator
  • Get additional functionality with the Advanced Tape feature
  • No learning curve -- just one powerful, easy-to-use app
  • Plus, you get two apps in one!

The Construction Master Pro app gives you the same features and functions as our industry-standard Construction Master Pro. You'll actually get two apps in one, since the Construction Master Pro app has all the functionality of the Construction Master Pro and the Construction Master Pro Trig - includes a full User's Guide built in as well as the ability to press and hold a key for specific help!

Need quick, accurate solutions when meeting with a client? Left your calculator in the truck? Just pull out your smartphone or tablet, tap on the Construction Master Pro icon, and you'll have your answer in seconds.

Advanced Tape function provides a number of features. It enables you to display, review, save and email inputs, descriptions and calculated values for each function. Use function to record inputs and outputs for saving as a file to archives or as an attached PDF in an email.

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

  • Solve tough construction-math problems 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.
  • Built-in help - just press and hold the desired key for full, clear definitions, explanations and examples of keystrokes.

[+] Details
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
  • Studs: Find Number On-center
Area and Volume Solutions
  • Length, Width and Height Keys
  • 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
  • Blocks, Footings
Special Functions
  • Trigonometric Function Keys: Sine, Cosine, Tangent, Arcsine, Arccosine, Arctangent
  • Board Feet
  • User-Definable Preferences
  • Entry Editing Backspace - with a swipe of a finger
  • Cost per Unit (total costs based on unit price)
  • Equal-Sided Polygon
  • Compound Miters
  • Crown Angle
  • Paperless Tape
  • 4 Memories

[+] Reviews
Overall Rating Full StarFull StarFull StarFull StarFull Star
5 out of 5 
User Reviews
Essential 5 out of 5.0
User: , Project Manager from Amityville, NY
User Rating: ★ ★ ★ ★ ★
Have and use the Construction Master I bought 25 years ago. Still my most productive tool. Have the Construction Master Pro on my phone, and gifted app many times. Loved it for 25 years and more to come. Add fractions to decimal to metric, awesome.

Just as good as the original 5 out of 5.0
User: , Project Architect from Raleigh, NC
User Rating: ★ ★ ★ ★ ★
I used the CM Pro calculator for years before finally breaking down and buying a smartphone. Once I did, this was the only app I *really* needed (sorry, Angry Birds). It's simple, straightforward, and as reliable as the original calculator.

When I found the app for phone I had to have it. 5 out of 5.0
User: , Owner of Al Reed Builders,LLC. from Oconto Falls, WI
User Rating: ★ ★ ★ ★ ★
This is the best app I have. I use it the most out of all other apps.
Now since itís an app in my iPhone I always have it with me and can never missplace it. For me thatís a big plus.

Best App Ever 5 out of 5.0
User: , Architect from Salt Lake City, Utah
User Rating: ★ ★ ★ ★ ★
I have had a Construction Master Pro Calculator since 1990, when I wanted to replace it around 2009, I bought an i-phone just so I could have this app! I love this app and it's the only one I need to buy.

0 out of 5.0
User Rating:
Greetings! Android customer here. Just downloaded Construction Master Pro. I'm actually an artist, and its what I've been looking for for quite some time to help me accurately upscale my works from small sketches much larger works. My review is 'I love it!'

Construction Master Pro 5 out of 5.0
User: , President of Northwest Glass & Mirror, Inc. from Boone, NC
User Rating: ★ ★ ★ ★ ★
This is one of the best apps I could ever have on my phone. I have used several of these calculators over the years on a daily basis, but now I carry it with me wherever I go. One of the best tools I own!

5 out of 5.0
User: , Carpenter from Santa Ana ca
User Rating: ★ ★ ★ ★ ★

5 out of 5.0
User: , Owner of William Hillman Carpentry from Ardmore, Pennsylvania
User Rating: ★ ★ ★ ★ ★
This calculator works just like the hand-held units we all rely on. I tried several other construction specific calculators available for the iPhone/iPad, but found them all clunky and confusing. I think Iíll stick with what I know.

Awesome App 5 out of 5.0
User: , Project Manager from Roseville California
User Rating: ★ ★ ★ ★ ★
The construction master pro is the best app ever. I love it.

Excellent App! 5 out of 5.0
User: , Construction Manager of Palomino Enterprises, LLC from Houston/Austin, TX
User Rating: ★ ★ ★ ★ ★
Finally ... Have had the standalone in the shop for years, now have it on my phone. There is nothing better on the market, in any form! Thank you, Calculated Industries!

Well Worth The $$ 5 out of 5.0
User: from Stevensville, MT
User Rating: ★ ★ ★ ★ ★
I had been waiting for this app. I have had many Construction Masters over the years and love the format. Now with the app on my phone I never am without it. The format is just like the hand held units so nothing new to learn. Like the heading says it is worth the money.

great product! 5 out of 5.0
User: , Owner of Finn Fine Homes, LLC from Ohio
User Rating: ★ ★ ★ ★ ★
I use the original Construction Master Pro in my remodeling business for rafters, stairs, squaring foundations, etc., so this was the first App I downloaded to my iTouch! I just started to use it, but it looks and feels like the real thing-- no learning curve.

[+] Support Materials