Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers,… by Calculated Industries

(5678 customer reviews)

$52.29

$52.29

Top Pick — discover the Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers,… by Calculated Industries, built for performance and designed for life in the United States.

About Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers,…

  • SOLVE ALL YOUR DIMENSIONAL MATH quickly and accurately with the award-winning CM Pro construction calculator’s powerful built-in solutions for completing layouts, plans, bids, estimates and more, directly in the building units you prefer
  • LETS YOU EFFORTLESSLY WORK IN AND CONVERT between all common building dimension formats: feet-inch-fractions, decimal feet-inches, yards and metric — including area and volume. Plus weight-per-volume and D:M:S to decimal degree conversions too
  • TIME-SAVING BUILT-IN FUNCTIONS for right angles give you instant solutions for square-ups, rafters (hip, valley, jacks), rake-walls, slopes, angles and more. Plus complete stair layout, advanced solutions for arcs, arches, circles, columns and more
  • PREVENTS COSTLY MATERIAL WASTE with built-in solutions for roofing, drywall, studs, blocks, concrete footings and board-feet lumber estimating. Plus compound miter functions help you avoid errors when working with crown molding and other pricey millwork

The Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers,… by Calculated Industries combines reliability, modern design, and user-focused engineering. Perfect for everyday use, it delivers dependable results for American customers who value innovation.

Specification: Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers,… by Calculated Industries

Manufacturer

‎Calculated Industries

Part Number

‎4065

Item Weight

‎8.2 ounces

Product Dimensions

‎5.75 x 3 x 0.6 inches

Item model number

‎4065

Batteries

‎2 LR44 batteries required. (included)

Is Discontinued By Manufacturer

‎No

Color

‎Silver

Style

‎Handheld

Pattern

‎Calculator

Power Source

‎Battery Powered

Voltage

‎1.5 Volts

Item Package Quantity

‎1

Measurement System

‎metric

Display Style

‎Digital

Batteries Included

‎Yes

Batteries Required

‎No

Battery Cell Type

‎Alkaline

Warranty Description

‎1 year manufacturers

National Stock Number

‎4820-01-299-7444

Date First Available

July 14, 2008

Photos: Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers,… by Calculated Industries

5678 reviews for Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers,… by Calculated Industries

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  1. David Long

    Its for stair working out etc

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  2. S.H.

    Has all the features of the 4065 and the 4080 trig model.
    I also have the 4065 which is more portable.
    Not exactly portable but it’s awesome!!
    All of the construction master calculators are incredible.
    Also they have a huge library of videos on YouTube and if you get stuck you can call them and there’s always a person there that can help walk you through it.
    Great customer service. Every time I’ve had to call it’s a real person here in the US. Can’t say enough good things about this calculator and the company.

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  3. Alexander

    Quality is great! Display is a good size!

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  4. T. R.

    I like the product. I have had one before. It was supposed to be delivered within 4 hours by 6 PM yesterday evening. It got here at 4:30 this morning. It was left on the edge of my porch, where it rained. Amazon delivery is getting worse as it goes. Between late packages and your package seems to be lost.

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  5. Rod Robertson

    Works great, cover saves from the dust

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  6. Joe P

    Great calculator! Long battery life makes computing fractions a breeze!

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  7. Jason McCool

    My old one finally wore out after maybe 20 years, so I bought a replacement that should last me until I retire in another 20. I like that the company is out of Nevada not far from where I used to live. I don’t use half the functions, but it’s nice that they are there. Strong case protects it well.

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  8. JLBROWNWOODWORKS

    A little pricey compared to others.
    Does everything you would expect. Works great and made in America.

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  9. Jun S. Capulong

    Very useful in framing works.

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  10. Russ Christensen

    Years ago when I was building and cutting roofs I relied heavily on Marshall Gross and a TI-35 calculator(IYKYK) and was able to calculate anything I encountered. Fast forward 25 years where work and life have taken me other places and I was no longer using Trig and geometry on a regular basis, my ability to calculate has diminished. It would probably be fairly easy to go back and brush up with the help of Roof Framing, but I decided to come into the light and try a dedicated construction calculator for a few planned fanciful construction projects. Enter the Construction Master Pro. I haven’t had it long enough to attest to it’s durability but I’m confident that the Construction Master reputation for quality is deserved. Fortunately, mine also came with an Armadillo Case, which seems like it will be great for protecting the calculator. I took it out of the box and started performing calculations with the included quick start guide, which stores very conveniently in the back side of the calculator. Keystroke sequences are not always intuitive if you are accustomed to using a scientific calculator for these calcs, but it seems that with a little more practice they will became second nature, and there are short cuts built in to the process for more advanced calculations. I’m looking forward to mastering this calculator…..I definitely recommend it’s purchase.

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    Last updated on October 19, 2025 5:26 am Details
    Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers,… by Calculated Industries
    Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers,… by Calculated Industries

    $52.29

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