BuildCalc - the easiest AND the most advanced construction calculator app.
Pros & Cons
Highly specialized, professional-grade calculations for railing, stairs, and masonry
Interactive results with automatic updates and easy result saving
PDF export of dimensioned drawings for sharing and printing
Extensive input customization with unlimited sizes and flexible unit handling
Focus on advanced construction scenarios may be less appealing to users seeking simple or general-purpose calculators
Higher one-time price point at $24.99 compared to many free or lighter-weight alternatives
Some features rely on manual input and domain knowledge to maximize value, which may require a learning curve
About BuildCalc
BuildCalc is a business app developed by 42nd Parallel.
Download Statistics
BuildCalc has been downloaded 9.9 thousand times. In the last 30 days, the app was downloaded 73 times. It is ranked #5 in business.
User Ratings
BuildCalc is rated 4.72 out of 5 stars. The rating is based on 190 ratings.
App Information
BuildCalc costs $24.99 to download. The APK download size is 8.71 MB. The latest version available is 2.1.110. The last update was on February 26, 2026.
Technical Requirements
BuildCalc requires Android 4.0.3+ or higher. The app has a content rating of Everyone. The app has been available on Google Play August 2011.
Description
What if you could take the best construction calculator and fix it. That’s right ... you love it, it has served you well, and you stand by it ... but could it do more? Could it be easier to use?
*** I have a lot of myself in this app and want it to be the best construction calculator app. IF YOU ENCOUNTER ANY DIFFICULTIES, PLEASE CONTACT ME AT INFO-AT-BUILDCALC.COM - I REALLY WANT TO HELP! ***
After nine months of development and testing by pros from around the world, BuildCalc for Android is ready to give you more - more function and more answers with less complexity, less hassle, and less confusion.
MORE FUNCTIONALITY:
• Advanced Baluster Function: Complete layout of railing and staircase balusters with less guess work - and with all the flexibility you need for every custom job. • Advanced Stair function: Stair layouts for professional results - including dimensioned drawings of your Stringer, Stringer Installation, and Finished Staircase. And you can email a PDF of these drawings right from BuildCalc so you can print them or share them. • Fence Function: Give BuildCalc a fence row length and it will tell you how many posts, rails, pickets, and or panels you need. • Interactive Functions: The Stair, Baluster, Compound Miter, Diagonal and Hip/Valley functions are now fully interactive. Want to change input values? Change the Run? Switch between Regular and Irregular Hip Roof analysis? You can do this and your results will be updated automatically - without you needing to remember what key to press. • New Full Daylight Visibility Mode
MORE ANSWERS:
• You are no longer tied down to: only one brick, block or tile size for the masonry function; a fixed number of drywall sheet sizes; only one footer cross sectional area; or one size of shingles and sheathing. If you don’t see the size you want, you can add as many as you need. And for area input, you can store your custom sizes in Length x Width format, so you won’t have to do mental gymnastics to figure out what was the dimensions for that last size you stored. • Want to cut your hip roof rafter using a miter saw ... or a circular saw using a hand-held protractor? With a tap of a button, BuildCalc will automatically switch between Miter Saw and Protractor results. BuildCalc can do this for Compound Miters, too. • Sheathing Angles, Purlin Angles, Gable Area, Backing Angles, Plan Angles, Rough vs. Finished Stair Layout Dimensions, Stringer Throat, Stringer installation dimensions ... and a lot more not found on other construction calculators.
LESS COMPLEXITY AND LESS HASSLE:
• Tired of having to press and press and press buttons to get the results of a calculation? BuildCalc puts an end to this. For all advanced functions, you get ALL of your results in list form with just one or two key taps. • And, rather than having to write down those results, all advanced functions allow you to save your results so you can recall the complete results at your convenience. • Less “quirks”. Have you been annoyed by arcane key stroke sequences on other construction calculators? We are too. BuildCalc streamlined the keystrokes to do a better job of giving you less “errors” and more results. Don’t remember what you have to enter before a Hip Rafter or Stair calculation? Well, now you don’t have to. BuildCalc will provide you with a check list of inputs and on-the-spot help to get it right. • Drywall and Masonry “Room Mode”: If you have stored a Length, Width and Height for a room, BuildCalc will give you the Drywall or Masonry required for the walls and the ceiling / floor - with only a tap of the Drywall or Masonry button. No more pondering over complex key sequences ... it just works. • Full Construction Master® Pro emulation. BuildCalc is in no way affiliated with Calculated Industries, owners of the Construction Master trademark.
Recent changes: FIX: Tape in [Results Only] mode will crash if there is only one calculation on the tape.
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This app is GREAT! I've had this and Construction Master Pro on my phone for years! But BuildCalc has been the one I choose to use daily! Now with Construction Masters greed BuildCalc is an even better value not to mention a better Calculator! Don't hesitate once you have this on your device you will use it more than you thought you would! Love this app!!
★★★★★A Google user· May 29, 2016
John Best calculator on the market for remodel and new construction. Stair steps, rails, and balusters become a breeze.
★☆☆☆☆Duane Fair· Apr 25, 2017
Too much permission request from this app. The calculator works fine. It doesn't need access to device and app history or call info, etc. Check the permissions yourself and decide if a calculator needs access to all that info
★☆☆☆☆Billy Johnson· Dec 10, 2025
Been a brilliant app since I installed it 10 years ago, but for the last 3 months it's developed a bug. It takes forever to load, when it does it I do a calculation then come out of the app to use anywhere, then come back into this one without shutting it down then it crashes and weight accept any commands. Forcing an app closure then the long wait to get back in
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