Construction Master Pro Calc

Calculated Industries

In-app purchases

About this app

FREE 14-day trial. The go-to construction calculator for framers, contractors, and builders. Feet-inch-fraction math, roofing, framing, stair layouts, and material estimates in one app.

The professional construction calculator built for the field. Includes Construction Master Pro and Construction Master Pro Trig in one app, with the CMPro Training Guide built in.

The proven framing, roofing, and stair calculator trusted by contractors and builders. Built with the same core engine that powers the industry-standard advanced construction math calculators from Calculated Industries. Award-winning tools trusted by the industry for 40 years.

BUILT FOR THE JOBSITE
• Framing and carpentry made faster: rafter cuts, stair layouts, lumber quantities, and framing calculations on the job.
• Roofing contractors: roofing calculations for bundles, squares, pitch, and slope in seconds.
• Builders and general contractors: construction estimates, material takeoffs, and building layouts done right.
• Concrete and masonry: footing volume, block counts, and unit conversions calculated instantly.

WHY PROFESSIONALS CHOOSE CONSTRUCTION MASTER® PRO
• Powerful built-in calculations make this construction calculator ideal for completing layouts, plans, bids, and estimates.
• Work in and convert between all common building dimensional formats, US & Metric.
• Built-in right-angle functions simplify square-ups, rafters, slopes, and more.
• Handles framing, roofing, concrete, lumber, and stair calculations in one app.
• Full trigonometric functions for advanced construction math.

BUILT-IN SOLUTIONS
• Dimensional Math and Conversions
• Feet-Inch-Fraction, Inch Fraction, Yards
• Decimal Feet and Inches (10ths, 100ths)
• 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 Rafter Keys
• Regular and Irregular Hip/Valley & Jack Rafter Keys
• Rafter Cutting Angles (Plumb, Cheek, and Level Cuts)
• Stair Layouts (including – Riser Limit, Stairwell Opening, Headroom, Floor Thickness)
• Rake-Wall (including Arched)

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 & 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

APP-ENHANCED FEATURES
• Fast Fractions Mode: dedicated fraction keys for faster, more precise construction calculations.
• Construction notes made easy: create text or voice-to-text notes, set up folders by project or client, add attachments, and share with your crew.
• Searchable Help and how-to videos for every construction calculation.
• Context-sensitive Help: press and hold any function key for Help text, diagrams, and videos.
• Save and share construction calculations and outputs (e.g., cut lists) with others on your crew.

SUBSCRIPTION INFORMATION
Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage or cancel in Play Store > Account > Payment & subscriptions > Subscriptions.

TRADEMARKS
Construction Master® and Calculated Industries® are registered trademarks of Calculated Industries, Inc.

Copyright 2026

Ratings and reviews

Too expensive. CM asked me to try the app and consider editing my review. I am a full time carpenter, I have used CM standalone calculators, and this app pretty extensively. It is a good product. I really like the rafter calculator, and the feet/inch measurement math and conv functions. I like how the app feels like the standalone calculator. However, I can buy a standalone calculator for about the same as a yearly subscription to the app, this needs to be a permanent purchase not subscription

I like the app, but!!!! I find the app appealing, however, I am terminating my trial subscription. I would be comfortable with a one-time fee for the subscription, but not an annual renewal fee. I possess the physical construction master pro calculator. I find the convenience of its availability on the phone to be appealing, especially in the event I do not have access to a physical calculator.

It's been fine for a long, but now I'm locked out of a paid pro subscription, and I have to go the the most labyrinthine f_ing process to dig up purchase information from 8 years ago, only to find that it didn't work. Wouldn't it just suffice to sign into my Google account from which I made the purchase??? Edit: got it solved, developers are responsive. Still not pleased about the reactivation hassle, but I was too hasty to review.

What’s new

Crash fix.