Construction Master Pro -- Advanced Feet Inch Fraction Construction Math Calculator for Contractors, Carpenters, Engineers, Architects and other Building Professionals Utilities App Review (iOS, $19.99)


Languages: English

Seller: Calculated Industries, Inc.

iOS 7 updates.

Customer Ratings

Current Version:
5 Ratings
All Versions:
134 Ratings


Advanced Feet-Inch-Fraction Construction-Math Calculator by Calculated Industries

The official Construction Master® Pro from Calculated Industries for your iPhone and iPad includes two models: #4065 and #4080 (CM Pro with Trig). 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
• Paperless Tape
• 4 Memories

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

Customer Reviews

  • Great for Framing

    by whateverjustin

    Best calculator for construction. I have the physical calculator too. I've been using this for 13 years on the job site. Love it

  • Nice!

    by Akbaize

    I used to have to carry a contractors calculator - retail $69. Now I have this app - does all the same computations for a fraction of the cost....and I don't have to carry another device. Let's be honest, our phones are with us always :) ..... And I like the quick tips video at initial launch. Very helpful!

  • iOS 7


    Please get the update for iOS 7 ASAP! I love the app but this is the only one that is not working on iOS 7. Yes I am a developer and I understand iOS 7 has not released, but I really don't want to downgrade back to iOS 6 for one app! Thanks and keep up the good work!!!!

  • Uhh

    by Jacques Gene

    Great app but doesn't work in iOS7

  • Cm pro construction

    by Fidort

    It is a good construction calculator .

  • Great app for Architects

    by Nemotarius

    I have the hand held version of this calculator and find it so handy in my everyday use. I was very happy to see I can have a version on my phone too. Great work CI!

  • Best App for Contractors

    by Alex15655

    I am a PM and this is the most useful app I have ever come across. I use it multiple times a day. Now updated for iPhone 5.

  • Construction calculator

    by Notpitt

    I have been using these for years and now have added it to my phone. This one less item that I need to carry around the job site. As a superintendent, this has become one of my most useful tools. I recommend that all builders to use this.

  • Owner

    by Hammer1970

    This does not fit my I phone 5 screen. But maybe there will be a update other than that it seems to work just like the real thing

  • Top App For Builders

    by Build 1

    Works perfectly on iPhone 5, just like stand alone unit, no need to carry calculator and phone.

  • Jbon

    by Jbon!!

    Works great!!! So convenient, I don't have to carry the actual calculator. I can do it straight from my phone. Sweet!!!!

  • Great App

    by Mlongbsa

    I used this daily when I worked for a home improvement retail chain to calculate job quantities for customers. Works like a charm and easy to follow instructions if the user forgets formulas.

  • Perfection

    by MatthewCWI

    Perfection. Just like the real thing. Awesome app!

  • Awesome

    by Figs and wine

    Aside the fact that I can't carry my iPad in my tool belt, which is where I keep my actual construction calc. This app is great. Better than the real thing because of it's easy and immediate reference section. And for a fraction of the cost. Get it.

  • great product

    by DanOlind

    This is an awesome tool - I've had the calculator (Model 4060) for years and use it often as a constrution estimator/PM. Now I always have it handy. Good work CII team.

  • Love it!

    by Michael V.

    As a draftsman by trade, I use this app every day at work & it's by far- the best construction calculator out there. Well worth the $20. The normal calculator is $80, so this app is a bargain, and i don't have to carry anything extra when I go to job sites, which is a definite plus.

  • My favorite app.

    by OverKill LLC.

    Best construction calculator ever. I use this tool faithfully.

  • Where is my calc.

    by Carpentry pro

    I have always had my construction master on me while working. And when I got to my weekend side job last week and realized I had forgot it in my work truck I thought I was in for a long day of chicken scratching. Thank you for creating an exact replica of the calculator as an app you saved me hours of work for a fraction of the price I spent on the many of you calculators I already own.

  • Great app!!! 5 Stars!!

    by lilmoria

    Great app for estimating, no need for a separate handheld and less expensive!!!

  • Sensacional

    by los giles

    Tiene todo lo que nesecito

  • Not formatted for iPhone 5

    by Jtgr6

    Please update for iPhone 5 screen. I will change it to 5 stars when this happens because other than that it is a great app.

  • Buggy

    by Lunajuan29

    Since the latest update I've experience crashes and app freezes on 6.0 iPhone 5. Please fix I've used this app for a year already and when I need it it decides not to work as previous versions did

  • NO PRO

    by disappointed619

    When I saw this app I was thrilled to have a tool I use all the time on my phone. However it does not have a function a true construction master PRO has which I use often (finding a radius arch in a rise/run condition) making this app more like a construction master IV. I feel I was miss led by this apps title and would not have fished out 20 bucks had I known.

  • Cali GC is impressed

    by :Supadupa:

    I have many construction master calculators that have served me well over the years. This app is a perfect replication of their physical calculators for a fraction of the cost. One client meeting when you do not have to say, "my calculator is in the truck" and this app pays for itself. $20.00 is 4 times more than I have ever paid for an app but in this case it was a serious bargain! Perfect app without a single glitch so far.

  • Great app

    by Blunteridgaf

    Works well

  • Fantastic

    by cs9900

    As a finish carpenter I've used a CM calc for years. When I got an iPhone a few years back, I immediately looked to see if CI had made an app--I was sad to find they hadn't yet at that point. I used cheaper, less functional constr calc apps for a while, even contacted CI to request a real CM app. They said they were thinking about it. I waited and waited, and bought it when it first came out, using it regularly ever since. I was stoked to find it was very well done, not like so many junky apps out there. The iPad version is great now, also! And having the manual right there at all times makes it even more valuable than the dedicated calculators, not to mention if I have my phone I have my CM! I couldn't be happier!

  • Great App!!!

    by cdv

    I am an architect and have relied on my Construction Master pro calculator for years in practice. Last year I was about to buy a new one to replace my old one that wasn't functioning properly. I went to the Construction Master Pro website to compare various models and noticed they had one for the iPhone. Which was substantially cheaper than what I was about to pay for a one of the newer models, I might add. I immediately went to iTunes and downloaded it. It has been great having it available whenever I needed it. Now I am very pleased to see it works natively with the iPad as well. A must have app for professionals and anyone in the construction industry that has to deal with quantities, dimensions, and conversions, etc.

  • woohoo! five stars for this upgrade!

    by ukktor

    oh man, finally ipad ready! i have been waiting for this a long time. i have had the original version for iphone and an actual CM Pro calculator, both are great. I've been using them for making furniture and r/c airplanes and my patio. it's a great calculator for a tinkerer like myself. the new ipad version looks great. THANK YOU!

  • The best

    by rberry61

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

  • Awsome app!

    by Package719

    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

    by Mombo427

    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.

  • Full Featured app. This is the one.

    by ST Williams

    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

    by MrRelo

    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

    by Chainfall


  • Saved me money

    by Jonrulesheppner

    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

    by 1j2k3h

    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

    by Redwood329

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

  • Best Construction Cal in the app store!!!!!

    by abab79peach

    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.....

  • ipad

    by vipergirl281

    please make it ipad compatible.

  • The best General Contractors app out there

    by iPrankster

    For those that give this app a bad review obviously doesn't know how to use an advanced construction calculator such as this one. Has everything you need, from figuring stairs, rafters, concrete yards; EVERYTHING pertaining to building. I've used there stand alone calculators for years, now it's right on my phone.

  • Great alternate when I don't have my CM Pro

    by Adam Schinker

    I doesn't replace my CM Pro, but is great for quick reference when my CM isn't handy. I wouldn't P&E a whole project with it, but you could if you absolutely needed to. If you need a hard copy of the user guide check out CI's website, it is a better reference than the built in guide. I have used the CM series of calculators for about 15 years and the iPhone version is on par with the physical calculators.

  • Love it!

    by RPL-NJ

    I own the Construction Master 5 Calculator. When I found this on app store I had to have it. It's one of my favorite apps!

  • There is backspace!

    by Hoghd06

    People there is backspace. Swipe your finger from left to right on the readout. Try it out and update your reviews so we can get an update. Amazing app love not having to carry around a calc when I know I always have my phone on me. Love this thing great for All types of construction. 

  • Best app ever

    by Jacob Ferguson

    I have been a long time user of a Construction Master IV and this app takes everything great about the master iv and makes it better. The ability to hold down a key to get help with a subject is wondeful. No more thumbing through a booklet for answers. It's great to always have my construction calculator with me. I read some reviews where people were complaining about the flash screen while the calculator loads. These people just want something to complain about. The screen is only there for 2 seconds. If you can't wait that long then something is wrong with you. Overall this is the best and most useful app that I have come across.

  • The top in Construction Calculations

    by springer*h-d

    I have owed a Construction Master Calculator for 10+ years. That calculator help me figure out every job. Now even better I have this App version with me at all times. So good, I gifted the App to my father.

  • $19.99 is just too much!

    by Appstore Reviews

    I bought it at $9.99 and thought that was a stretch!

  • Attn. Good Framers:

    by KobeKart5000

    For the best trusses and most reliable service in southern California call us. It would be foolish not to check us out. CM app is amazing. Better than the hardware version.

  • True to form

    by rmryerso

    UPDATE #2: Backspace already exists. It is activated like the stock Calculator app by swiping your finger across the readout left to right. It runs fine on iPhone 4, but the graphics are a bit choppy. The splash screen is only there for a brief instant, confirming my suspicion it is merely a distraction to prevent the user from thinking his iPhone is being unresponsive. Well worth the asking price. Don't forget the other Calculated Industries apps available! UPDATE #1: After using this software for over a month, I still prefer BuildCalc because it has more functions. Things where others shine and the CMP needs improvement is in the user interface. When the [Conv] function is pressed, it would be nice if the buttons would change to reflect their alternate functions. Other things that are missing are a backspace key and the readout doesn't show which operand was pressed. Did I press [x] or [+]? And with no backspace, it could be frustrating if a keystroke is missed. This is still a great buy for $14.99 considering the actual calculator costs $80. Most of that cost is the hardware. The skin is easy to see in bright sunlight and the load time is short. I could care less to see the logo at the top of the screen. I'd prefer to see the status bar with the clock to keep track of time while on the job. I also agree with the previous poster about the splash screen. Who cares about the logo? Show me the calculator. However, I suspect the splash screen is a time killer. Otherwise, the substitution is watching a calculator interface which can't be used for a second or two. The splash screen is literally there to prevent the user from thinking his iPhone is being unresponsive.

  • Backspace

    by Joimdawoim

    Worth 2 stars. Since we're not dealing with real buttons here it is way too easy to mistype and having to clear all the input is a real time waster. Gimme backspace I'll give you 2 stars.

  • OS/iPhone 4 update needed

    by Tkdude

    The graphics need updating for the iPhone 4, otherwise very good app.

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