Construction Master 5 Calc 4+

Feet Inch Fraction Calculator

Calculated Industries

Designed for iPad

    • 4.9 • 9.4K Ratings
    • Free
    • Offers In-App Purchases



FREE Try Before You Buy trial, your App Store account is not charged by Apple during the free trial.

Introducing the Construction Master 5, an innovative feet-inch-fraction builder's calculator that revolutionizes project efficiency and accuracy. For over thirty years, this award-winning tool has been a vital asset in North America's construction industry, trusted by professionals for its precision and reliability.

The Construction Master 5 was built for professionals, including Builders, Contractors, Designers, Fabricators, Framers, Carpenters, Tradesmen, and Advanced Do-It-Yourselfers.


• Tailored to meet the needs of Builders, Contractors, and Designers
• Essential for Fabricators and Framers/Carpenters
• Invaluable for Tradesmen across specialties
• Perfect for Advanced Do-It-Yourselfers requiring precise measurements
• Aim to enhance speed, accuracy, and productivity in dimension-focused projects


• Compatible with both iPhone and iPad
• Replicates the trusted functions of our traditional handheld calculators
• Enhanced with exclusive features for mobile users
• User-friendly design with a comprehensive User’s Guide
• Includes Searchable help and a 'press and hold' feature for instant help on functions, supported by tutorial videos


• Equipped with a robust core engine from Calculated Industries
• Assures unmatched reliability and precision
• Perfect for construction or DIY projects requiring exact measurements
• Offers powerful built-in solutions for layouts, plans, bids, and estimates
• Works in and converts between various dimensional formats, including imperial and metric units


• Extensive dimensional math and conversion capabilities
• Features complete right angle and rafter calculations
• Includes area and volume solutions for square, cubic, and circular calculations
• Special functions like Board Feet, Cost per Unit, and Advanced Paperless Tape
• User-definable preferences and memory function for personalized use


• Entry-editing Backspace Key for easy corrections
• Context-sensitive help is available for each function
• Ability to save or email calculations and outputs like cut lists
• Facilitates complex calculations with ease
• Designed for efficient use in the field, office, or on the go

With the Construction Master 5, take your construction and DIY projects to the next level of efficiency and precision. This tool not only simplifies complex calculations but also brings a new level of professionalism and accuracy to your work.

Whether working on the job site, in the office or tackling a home project, the Construction Master 5 is your indispensable partner, ensuring that every measurement and calculation is on point. Upgrade your toolkit with the Construction Master 5 and experience the future of construction and project planning today.

The first 7 days are free. Subscriptions offered will automatically renew at the end of the chosen period. Payment will be charged to your Apple account upon purchase confirmation. The subscription will automatically renew unless auto-renew is turned off or the subscription is canceled in settings at least one day (24 hours) before the subscription period ends. You can manage your subscription and turn off auto-renewal in your Apple account Settings > Subscriptions.

CONSTRUCTION MASTER is a common law trademark owned by Calculated Industries. Calculated Industries’ U.S. Trademark Registration Nos. 2138685 and 1569347 have expired. Calculated Industries owns U.S. Trademark Serial No. 97752159 for CONSTRUCTION MASTER.

Copyright 2024

What’s New

Version 12.5.36

Thank you for the feedback!
Fix to key press behavior: removed swipe-right to open menu, added back swipe-right in display to backspace 1 character per swipe

Ratings and Reviews

4.9 out of 5
9.4K Ratings

9.4K Ratings

Robert Ryan Henline ,

Master 5 calculator

I’ve been using this calculator on my phone for the last 10 years.
It’s very accurate and helps me in my every day task as a welder fabricator. I would recommend and I do recommend every welder fabricator should put this app on their phone. It does everything someone in construction needs get one you won’t be sorry.

Developer Response ,

Robert, thank you for the kind review and the 5 stars!

CGH_1975 ,

You must think we’re idiots

Why would I pay $36 per year when I can buy the actual calculator for fifty dollars and the last one I bought lasted me over ten years as a matter of fact it was working the last time I saw it, it was stolen from my toolbox during a job I was working on point being is you could make the price ten dollars and I’m certain you would make plenty of money from your sales don’t be greedy it’s a great calculator lower the price for the lower class working man and you would most likely prosper in more ways than you can imagine. Thanks

Lawelds ,

Don’t recognize my original purchase of app

My old phone got wet screen went all black so had to get a new phone and now app says it doesn’t recognize purchase or whatever and now wants me to repurchase but now with a subscription what is that about why would you guys have a subscription for this calculator that would make this calculator super expensive I have a handheld one that I bought before i purchased this app few years ago but that is just a another thing I would have to carry around I’m a welder and having it on the phone was perfect but this subscription is just crazy it’s just a calculator why would would you guys think this is ok to do

Developer Response ,

You do not need to purchase again. Your original purchase is safe. Please contact us at and we will help you transfer your App to your new phone.

App Privacy

The developer, Calculated Industries, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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