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Construction Master 5 Clearance
Construction Master 5 Clearance

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Model # CL-4050

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Construction Master 5 Clearance
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

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 +, -, +/-, x, ÷, %, pi, 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

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