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Construction Master Pro-Desktop
Model 44080
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Price: $89.95 Add to Cart
48 cont. states only

[+] Overview

Advanced Desktop Construction-Math Calculator with Full Trig Functions

The Construction Master Pro Trig - Desktop provides construction professionals with complete trig functions to help them quickly and easily solve complex construction-math problems. It saves time, reduces costs and prevents re-work. You can effortlessly work in and convert between feet-inch-fractions and metric units. Instantly calculate complex construction challenges for stair layouts, roofs, framing and much more. Full trig functions with sine, cosine, tangent, arcsine, arccosine and arctangent.

Construction Calculations:

  • Work in and convert between any building dimension, including Metric
  • Trig Function
  • Find Weight per Volume
  • Built-in Right-Angle solutions
  • Complete Stair Layouts
  • Roof, Rafter and Framing solutions
  • Circular: Arcs, Circumference, Segments and More
  • Stairs - Set Riser Height and solve for Stairwell Opening
  • Studs - Find number On-center for an entered Length
  • Compound Miter Cuts Arched Rake-Walls
  • Equal sided Polygons

The Construction Master Pro Trig - Desktop is perfect for completing layouts, bid and estimates. No office should be without it. It will save you time and money.

For Contractors, Architects, Builders, Engineers, Project Managers, Estimators, Draftspersons

[+] Details

Dimensional Math and Conversions

  • Work in and convert between all building dimensional formats: Yards, Feet-Inch-Fractions and Metric - including Area and Volume
  • D:M:S to Decimal Degree conversions
  • Find Weight per Volume
  • Full Trig Function: Sine, Cosine, Tangent, Arcsine, Arccosine and Arctangent simplify complex design and construction-math
Built-In Time Saving Functions
  • Complete Stair calculations for risers, treads, stringer length and incline angle
  • Advanced Stairs - set riser height and solve for stairwell opening
  • Built-in right angle functions
  • Easy area, volume and perimeter solutions with Length, Width and Height keys
  • Drywall, siding and paneling function calculates 4x8, 4x9 or 4x12 sheets to cover an area
  • Roof function finds area, bundles, pitch and squares
  • Custom rafter function solves for common rafters, regular and irregular hips, valleys and jacks; instantly find cutting angles for cheek, level and plumb angles
  • Jack rafter solutions for regular and irregular pitch roofs
  • Find rake-wall studs with on-center spacing
  • Compound Miter - store crown angle and enter wall corner angle to calculate the blade tilt and angle for miter cuts
  • Advanced solutions for circles, arches, columns, cones, pillars, windows and post-holes
  • Arched rake-walls with on-center spacing
  • Calculate the number of on-center studs for an entered length
  • Equal-sided polygons - calculate corner and bi-sect angles, side length, perimeter and area
  • Block and footing solutions
  • Board feet lumber estimating

Additional Features

  • Large multi-position tilt display LCD
  • User Preferences: Set custom defined options such as fractional settings, and stair headroom height, decimal degrees and more
  • Exponential Notation: Enter and display exponential values
  • Backspace Key: Makes it easy to change just-entered values
  • Cost per Unit: Easily solve unit costing and pricing
  • Accumulating Memory (M+) - Three additional memory storage locations
  • "Paperless" tape allows for review of last 20 entries
  • Works as a standard math calculator with +, -, +/-, ×, ÷, %, π, 1/x, X2, and √
  • Automatic Shut-Off extends battery life


  • Easy-to-follow User's Guide
  • Long-Life Battery
  • Full One-Year Limited Warranty
  • Full Size Keys
  • User's Guide, Spanish Pocket Reference Guide

Tech Specs

6.4" x 9.0" x 1.4" (162mm x 229mm x 35mm)

.68 lb. / 10.8 oz. (308.4 gm.)
Does not include User's Guide

Single 3-volt (CR-2032) Long-life Battery

11 Digits (7 normal, 4 Fractions) with Full Annunciators

LCD Dimensions:
1.4" x 5" (35 mm x 130 mm)

10 Digit Internal Accuracy

[+] Reviews
Overall Rating Full StarFull StarFull StarFull StarFull Star
4.78 out of 5 
User Reviews
We Love It! 5 out of 5.0
User: , Bid Coordinator of Shepard Steel Co., Inc. from Hartford, CT
User Rating: ★ ★ ★ ★ ★
Our Estimating Department uses them daily & loves it.

Perfect Desktop Construction Calculator 5 out of 5.0
User: , President of Dixon Y Machine, LLC from Dixon, CA
User Rating: ★ ★ ★ ★ ★
I have used Calculated Industries products for 15 plus years now and I wouldn't want to work without them. Very easy to use and accurate!

good product needs twiking 4 out of 5.0
User: , owner of Cyber Steel from Plano, TX
User Rating: ★ ★ ★ ★
this is my second construction Master pro-desktop the keys on this one are not as sensitive as the first one causing me press harder on the key pads. but over all this is a good product. if not for this one issue I would rate this product as excellent.

User Rating: ★ ★ ★ ★ ★

Large Print Version 5 out of 5.0
User: , Owner of MSHI from Levitown, NY
User Rating: ★ ★ ★ ★ ★
I love my large desktop version of the Construction Master Pro. Keystrokes are easier to read and easier to share with my Students / Seminar attendees. I call it my “over 50” version. This is one of my biggest moneymakers on the job - I compare it to my pneumatic framing gun in terms of increasing speed and efficiency in carpentry.

Construction Master Pro 5 out of 5.0
User: , President of Abel Detailing, Inc. from Phoenix, Az.
User Rating: ★ ★ ★ ★ ★
I've been buying this particular calculator for several years now. Absolutely wonderful tool.

Great for PMs 5 out of 5.0
User: , Project Manager from Dallas, TX
User Rating: ★ ★ ★ ★ ★
I've used the Construction Master Pro for the last decade - only changing the batteries as needed. This desktop version is a must for anyone in the construction industry. Beats an adding machine any day.

Calculator 5 out of 5.0
User: , owner of RIC BURNS REBAR SERVICE from Santa Rosa, CA
User Rating: ★ ★ ★ ★ ★
I am very old(79) and have used calculators of some type since the 1950's. This one is the best I have ever used. I like the size of the keyboard and all the functions. I do construction estimating and detailing (rebar).

Great Calculators 5 out of 5.0
User: , President of Amcon Associates from Port Chester —- NY
User Rating: ★ ★ ★ ★ ★
I have been using Calculated Industries Calculators for more than 20 Years and they are great.

Great product 5 out of 5.0
User: , Project estimator of PD Mechanical inc from California
User Rating: ★ ★ ★ ★ ★
This calculator has made my job easy, thank you.

5 out of 5.0
User: , Vice president of Mariello Construction Co. Inc from Albany
User Rating: ★ ★ ★ ★ ★
I have used products since the 80's. Never any problems

4 out of 5.0
User: , Project Manager - Construction of Davenport Development LTD from Grand Cayman Island
User Rating: ★ ★ ★ ★

What a great tool 5 out of 5.0
User: , checker/engineering of Matrix Service from Tulsa, Oklahoma
User Rating: ★ ★ ★ ★ ★
I have the construction master pro trig that I carry around. Adding the desktop model to my office was a good move. Same great functions, and easy to read. Thought I would like it powered by electricity but, enjoy being able to move the calculator around.

Estimatin 5 out of 5.0
User: , President of Townsend Constructors, Inc. from Clearwater, Florida
User Rating: ★ ★ ★ ★ ★
I have a $38,000.00 estimating computer program and end up using the Construction Master Pro calculator more. It fast, accurate and efficient.

Pro-Desktop 5 out of 5.0
User: , Superintendent from Phoenix, AZ
User Rating: ★ ★ ★ ★ ★
Great calculator. A must have for any construction professional.

Construction Master pro d 5 out of 5.0
User: , Project Planner from Burnt Hills, NY
User Rating: ★ ★ ★ ★ ★
I like the changes you've made. I have used my old model 4055 for years, and the transition to this desk model was easy to make. A great product! Thanks.

5 out of 5.0
User: , purchasing buyer of rec silicon from silver bow, mt.
User Rating: ★ ★ ★ ★ ★

const. Master Pro-Desktop 4 out of 5.0
User: , Corp. Secy of Mid America Truss from Jefferson City, MO
User Rating: ★ ★ ★ ★
We have several of these in our office and everyone likes them.

Great Product! 5 out of 5.0
User: , Office Manager of LeJack Construction from Ludlow, ME
User Rating: ★ ★ ★ ★ ★
I had recently married a man in the construction business. I was lost when it came to measurements. I had no experience in this profession. Now, i can easily figure pitch, width, height, etc. The dvd that came with the calculator showed me exactly how to input the data and come up with the correct answer, it was so easy to understand!

From good to better 4 out of 5.0
User: , contractor of Soule Construction Inc. from Aromas, CA
User Rating: ★ ★ ★ ★
A great product! It does everything i wanted it to do. Although, I wish it had a +_ key like my Texas Instrument calculator so I could subtract the present number in the display with the next number I enter.

5 out of 5.0
User: from Hopkinton, NH
User Rating: ★ ★ ★ ★ ★

Metric Feedback 4 out of 5.0
User: of EazyPlan Constructions from Altona, Australia
User Rating: ★ ★ ★ ★
This product is an excellent tool for building contractors, however it can be time consuming when transferring from standard imperial set up to metric set up for data input. Can you manufacture a totally metric Construction Master Pro - desk top calculator for metric measurement usage in countries such as Australia? I'd welcome your views as I would purchase a metric calculator immediately. Yours Sincerely, Gary McMaster

More than I needed 5 out of 5.0
User: of Horizon Mechanical from Palatine Il
User Rating: ★ ★ ★ ★ ★
There is more built into this unit than what I need.

Tough Keys 4 out of 5.0
User: from Helena, MT
User Rating: ★ ★ ★ ★
Calculated Industries obviously makes the best calculators for the construction industry. I really like the larger screen, but I have found that the keys can get difficult to press.

more memory 5 out of 5.0
User: from trenton, ontario,
User Rating: ★ ★ ★ ★ ★
the only thing I'd ask for is more memory keys. In drafting I've usually have to store about 5-10 different lengths, degrees, etc.

Calculated Industries, 5 out of 5.0
User: from Royal Oak, MI
User Rating: ★ ★ ★ ★ ★
I purchased this as a gift for my son who has a concrete business. He is very satisfied with it.

Construction Master Pro 5 out of 5.0
User: of Kerkhover + Studio + Architects, Inc. from Chester, IL
User Rating: ★ ★ ★ ★ ★
Exceptional Unit, has all of the features necessary for everyday architectural design and detailing. Desktop model has easy to read display. Ordering was quick and easy.

Construction Master 5 out of 5.0
User: of Exxcel Project Managment from Columbus, Ohio
User Rating: ★ ★ ★ ★ ★
The size is perfect for my desk, easy to read. I can always count on the calculations being correct no matter which quanity I choose to express them in.

Extremely Pleased 5 out of 5.0
User: of Qualico Steel from Birmingham, AL
User Rating: ★ ★ ★ ★ ★
This calculator is very easy to operate and has helped increase my capabilities.

4 out of 5.0
User: of Premier Building Systems from Fife, WA
User Rating: ★ ★ ★ ★

5 out of 5.0
User: of Locke from St Paul, MN
User Rating: ★ ★ ★ ★ ★

5 out of 5.0
User: of GraniTite of Houston from Houston, Texas
User Rating: ★ ★ ★ ★ ★
I was thrilled to find your booth at the World of Concrete in Las Vegas last week. I have been using a Projectcalc Plus for about 3 years. I love it but am so happy to find a desk top.

[+] Parts & Accessories
CR2032 Battery CR2032 Battery

Replacement battery.
CR2032 Battery | Add to Cart

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