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Construction Master 5 Clearance
Model CL-4050
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Price: $29.96 Add to Cart
48 cont. states only

[+] Overview

Open Box Clearance Item at a Reduced Price

Feet-Inch-Fraction Construction-Math Calculator

The Construction Master 5 is the essential tool for serious building professionals. Easy-to-use in the field or office it meets the need for fast, accurate construction- math solutions. Enter the numbers, just as you would say them and the solutions appear in an instant - they're built-in to your Construction Master 5. Ideal for plans, and layouts. Reduce the risk of expensive errors when estimating costs and materials. Save time, money and frustration!


  • Linear, Area and Volume solutions: convert dimensions, including Metric
  • Rafter, Roof and Framing solutions: Hip/Valley, Jacks and Rake-Walls
  • Stair solutions: Risers, Treads, Stringer, Incline
  • Built-in Right-Angle solutions: Automatic Square-ups
  • Circular and Arc: Areas, Diameters, Circumference
  • Board Feet
  • Weight per Volume
For Contractors, Builders, Architects, Engineers and Tradespersons

[+] Details

Dimensional Math and Conversions

  • Works in and converts between building dimensional formats: Yards, Feet-Inch-Fractions, Decimal Feet-Inches and Metric - including Area and Volume
  • Find Weight per Volume

Dedicated Functions

  • Stair calculations for Risers, Treads, Stringer Length and Incline Angle; displays Run and Rise
  • Custom Rafter Function provides Common Rafters, Regular and Irregular Hips, Valleys and Jacks. Jack Rafter feature provides complete solutions for Regular and Irregular Pitch roofs. Displays On-center spacing.
  • Solutions for Circles, Arcs, Columns, Pillars, Windows, Post-holes and more
  • Rake-Wall function determines Stud Length for any On-center Spacing, in Ascending or Descending order
  • Board Feet Lumber estimating

Added Features

  • User Preferences: Set custom defined options such as Fractional settings for 1/2, 1/4, 1/8, 1/16, 1/32, and 1/64
  • Backspace Key: Makes it easy to change just-entered values
  • Cost per Unit: Easily solve unit costing and pricing
  • "Paperless" Tape: Allows for review of last 20 entries; double- check totals
  • Standard Calculations: Works as a math calculator with +, -, +/-, ×, ÷, %, π, 1/x, X2, and √.
  • Automatic Shut-Off saves battery life


  • Protective Slide Cover
  • Easy-to-follow Pocket User's Guides in English and Spanish
  • Long-Life Battery
  • Full One-Year Limited Warranty

Tech Specs

5.7" x 3.0" x 0.65" (145mm x 76mm x 17mm)

Product Weight:
4.15 oz. (117.7 gm)
Includes Case and Pocket Reference Guide

One 3-volt (CR-2016) Long-life Battery

Display Type:
LCD: 11 Digits (7 normal, 4 Fractions) with Full Annunciators

Display Dimensions:
0.73" x 2.56" (19 mm x 65 mm)

10 Digit Internal Accuracy

[+] Reviews
Overall Rating Full StarFull StarFull StarFull StarFull Star
4.86 out of 5 
User Reviews
Calculator use 5 out of 5.0
User: , Vice President of AERO CONCRETE LTD from Iowa
User Rating: ★ ★ ★ ★ ★
We have used this calculator for 20 years. The only problem is breakage of the glass when dropped. The extra case does help with this

GREAT PRODUCT 5 out of 5.0
User: , Office Manager of MORRIS INDUSTRIES, INC from Powhatan, VA
User Rating: ★ ★ ★ ★ ★
Have used this product for years and never any problems

Very elite product 5 out of 5.0
User: , Roofing carpenter from Ireland
User Rating: ★ ★ ★ ★ ★
This is my 2nd calculator and still have my first. I use it all the time for stair and roofing calculations. I find it so accurate all the time. I would be lost without it. It's a wonderful product.

concrete construction 5 out of 5.0
User: , concrete foreman of Samson from tyngsboro,ma
User Rating: ★ ★ ★ ★ ★
By far the best calculator I've ever owned

Great Product 5 out of 5.0
User: from Middleburg, PA
User Rating: ★ ★ ★ ★ ★
Had previously owned a Sears version, it died. so I bought this one great product.

4 out of 5.0
User: , Designer of Interstate Engineering from Jamestown ND
User Rating: ★ ★ ★ ★

Awesome Time Saver 5 out of 5.0
User: , Carpenter of PLS Carpentry from Ontario, Canada
User Rating: ★ ★ ★ ★ ★
I am a carpenter, and since I found this calculator I will never be without it. great product.

Construction Master V 5 out of 5.0
User: , Architect from Annapolis, MD
User Rating: ★ ★ ★ ★ ★
Have a "Construction Master" from about 1986, still works. Decided it was time to get a new one and am not disappointed. great unit. See you in another 20+ yrs.

4 out of 5.0
User: , Owner of Parr and Assoiates, LLC from Georgetown, SC
User Rating: ★ ★ ★ ★
I would like to see a button for square feet and meter like the old one.

Construction Master 5 5 out of 5.0
User: from Branchland, WV
User Rating: ★ ★ ★ ★ ★
Perfect A+

Great Product 5 out of 5.0
User: of Casablanca Design Group from Atlanta, GA
User Rating: ★ ★ ★ ★ ★
This the second one I have had and used for 11 years. great product!

PRODUCT REVIEW 5 out of 5.0
User Rating: ★ ★ ★ ★ ★

Construction Master 5 5 out of 5.0
User: from Stockton, CA
User Rating: ★ ★ ★ ★ ★
Just what I need as a construction electrician doing layout

Best thing ever!! 5 out of 5.0
User: of MWS Inc. from Attleboro, MA
User Rating: ★ ★ ★ ★ ★
Const. Master 5 is the greatest calculator in the world. It takes so much of the work out of my job and it's so easy to use. The yellow color makes it really easy to find too.

Construction Master 5 out of 5.0
User: from Roanoke, Virginia
User Rating: ★ ★ ★ ★ ★
I have used your calculator for years, 15 years to be exact and I have been very satisfied. I owned your Construction Master IV calculator and it preformed every calc to the letter. I will never use another brand but your. You have met my expectations and I'm very happy with your product. Great Job and keep up the good work.

5 out of 5.0
User: of Industrial Constructors Managers, Inc. from Pueblo, CO
User Rating: ★ ★ ★ ★ ★

4 out of 5.0
User: of Sandra Kraft Designs from Weston, MA
User Rating: ★ ★ ★ ★
The thing I find annoying is having to hit Conv, M+ when I want to subtract something from memory. It's an extra step compared to the old Pocket Handyman II. Other than that, I think it's pretty good.

Not Just for Construction 5 out of 5.0
User: of Alstom Power from Claremore, OK
User Rating: ★ ★ ★ ★ ★
My wife loves this calculator so much that she has taken it away from me and is using it in her nursing classes. I may never see it again.

OUTSTANDING!!! 5 out of 5.0
User: from Starkville, MS
User Rating: ★ ★ ★ ★ ★
I have an older version of the calculator that has the exact same functions and i couldn't work without it. It is nothing short of a carpenter's dream tool!

Love it 5 out of 5.0
User: from Hawaii
User Rating: ★ ★ ★ ★ ★
No more rafter square and tables for me - Just cut em by the numbers. I never stack a roof without this tool. Precutting the hip is a breeze...

Handy 5 out of 5.0
User: from Maryland
User Rating: ★ ★ ★ ★ ★
Adding & subtracting fractional dimensions is fast & easy.

Glad to have 5 out of 5.0
User: from Omaha NE
User Rating: ★ ★ ★ ★ ★
Fast, easy.

[+] Support Materials