The Construction Master Pro is an award-winning advanced feet-inch-fraction construction-math calculator with powerful built-in solutions perfect for completing layouts, plans, bids and estimates. Calculate circles, roofs stairs, and more. Works in and converts between feet-inches-fractions and decimals, including metric. Use it in the field or office to save time, reduce costs, prevent re-work and maximize profits.
Work in and convert between building dimensions, including Metric
Built-in Right-Angle solutions
Areas, Volumes, Square-ups
Complete Stair Layouts
Roof, Rafter and Framing solutions
Circle: Arcs, Circumference, Segments
Drywall - Siding and Panels
Stairs - Riser Height and solve for Stairwell Opening
Compound Miter Cuts
For Contractors, Estimators, Architects, Carpenters, Framers, Draftspersons, Engineers, Builders, Tradespersons
Dimensional Math and Conversions
Work in and convert between building dimensional formats: Yards, Feet-Inch-Fractions, Decimal Feet-Inches and Metric - including Area and Volume
D:M:S to Decimal Degree conversions
Find Weight per Volume
Built-in Time Saving Functions
Complete Stair calculations for Risers, Treads, Stringer Length and Incline Angle
Set Riser Height and solve for Stairwell Opening
Built-in Right-Angle Functions for Square-ups, Slopes and more
Area, Volume and Perimeter solutions with Length, Width and Height Keys
Drywall, Siding and Paneling Key calculates 4x8, 4x9 or 4x12 Sheets to cover an Area
Roof Function finds Area, Bundles, Squares and 4x8 Sheathing for Flat or Pitched Roofs
Custom Rafter Function provides Common Rafters, Regular and Irregular Hips, Valleys and Jacks; instant Cutting Angles (Cheek, Level and Plumb)
Jack Rafter results for Regular and Irregular Pitch Roof. 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 Miters cuts
Advanced solutions for Circles, Arches, Columns, Cones, Pillars, Windows and Post-holes
Arched Rake-Walls with On-center Spacing
Studs - Calculate the number of On-center Studs for an entered Length
Equal Sided Polygon - Calculate Corner and Bi-sect Angles, Side Length, Perimeter and Area
Block and Footing solutions
Board Feet Lumber estimating
User Preferences: Set custom defined options such as Fractional settings for 1/2" to 1/64" 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+) - Plus three additional Memory Storage locations
Paperless Tape: Review of last 20 entries; double-check totals
Standard Calculations: works as a regular math calculator with +, -, +/-, x, ÷, %, π, 1/x, X2, and √
Automatic Shut-Off saves battery life
Rugged shock, dust and moisture-resistant Armadillo Gear case
Pocket Reference Guides in English and Spanish
Two LR44 Long-Life Batteries
Full One-Year Limited Warranty
Size: 5.7 x 3.0" x 0.65" (145 mm x 76 mm x 17 mm)
Product Weight: 4.6 oz. (130 gm) Includes Case and Pocket Reference Guide
Power: Two 1.5-volt (LR-44/A76) Long-life Batteries
Display Type: 11 Digits (7 normal, 4 Fractions) with Full Annunciators
Display Dimensions: 0.625" x 2.5" (16 mm x 63.5 mm)
Accuracy: 12 Digit Internal Accuracy
All your products
User: Jamie from Oak Park, IL
I'm a construction guy, my wife is the cook. We both use your products and love them. CM Pro and Pro Master Chef are excellent products
Construction Master Pro
User: Donald Stockell, Operations Dir of Stockell Gen Contr Inc from St. Louis, MO
Works even better than the Constr Master IV that it replaced.
User: Richard Manley, Contractor of Manley Construction from Crescent City, CA
I've used the construction master IV for years, it did what I wanted it to do. So I went shoping found the Master Pro, and it made calculating construction figures & estimates so much easier. Love it I'll buy another one, unless you come out with one that does more. Thank You
User: Liam Kavanagh, Carpenter/ Joiner of Local Government from Ireland
A must have for all in the construction industry. Couldn't imagine life without it.Recomend to anyone thinking of purchasing this calculator to buy it, you won't be sorry, it will pay for itself.
User: Lamar Kimmel, President of Kimmel & Kimmel Inc. from Hegins, PA
I have been using the Construction Master Pro for years. It is very helpful out in the field.
User: KC Ahles, Manager of Tomahawk Lumber Company LLC
I do rely greatly on your products and we have many contractor who do also. I have a Construction Master Pro sitting next to my key board at all times, a Construction Master Pro DT Printer and Scale Master Classic on my main desk and a Trig Plus II and Scale Master II in my briefcase. Now that I have a Droid X I'll be loading your app on it also. I don't understand how a true contractor lives without your products. I feel it's products like yours that make the difference between a Professional Quality Contractor and a wood butcher.
Construction Master Pro
User: Pierre Doyon, Superintendant of Tower Arctic Ltd from Iqaluit, Nunavut
I'm using my Master Pro most every day. Realy nice tool easy to use.
Still A Great Product
User: David Thurston, President of Nuera from Calgary, AB
This is my second Construction Master Calculator, the first I bought many years ago. Just wanted to update and it is an invaluable tool.
User: Raymond Leone, Carpenter from New York
Very handy tool.
User: from michigan
It will be outdated soon because of computer estimating programs. However it is still great for quick calculations for small projects, and alot less expensive than the computer programs.
User: Cheryl Carmichael, Office Manager of LeJack Construction from Ludlow, ME
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!
User: Dhanpaul Manbood, Welder/Fabricator of Weldtech Fabricators Inc from Queens, NY
This is a great product. I have used them for the past 9 years and would not be without one. I am working with the calculator every day. They have helped in completing over 1200 projects all across New York and New Jersey!
User: Hook Butters, Operations Manager of Redi Project Services from Lyman, Wyoming
It is a great calculator. It makes my job alot easier. I estimate alot of concrete work and using this saves me alot of time.
User: Joshua Moore, President of Josh Moore Construction inc. from Grass Valley
This is a great calculator. I have used them for the last 15 years and would not be without one. I ordered this product and it was delivered the next day I was amazed. Great company!
easy to use
User: lanier bowman of bomax from austin, tx
I am happy with the purchase of this tool. Information is very accurate and I will save a lot of time in the future.
User: Earl Armstrong from Digby , Nova Scotia
Could not get by with out it.
User: jeff from londonderry nh
Wish I had this a long time ago
User: Darryl Hiemstra of Triple M Housing Ltd from Lethbridge, Alberta
I am using it for both work and school. For work it has saved me so much time but in school we need more soft conversion than hard conversion(ex. inches to cm, or yards to metres). It would be nice if you had a calculator with this ability!
User: Jim Renaldi from Twin Falls, Idaho
Does all I need!
User: Ron Tompkins from Orlando,FL
The stair building section really helps.
User: DIck Homestead of ShattuckHouse from Colfax
We have used this and numerous others from CI for the past twenty years. They have helped in completing over 400 projects spanning all the USA, Canada and some even in Australia. Can's ask "Got Milk"?, but can say "Get Calc'd".
User: Scott Morton of Scott Morton Construction from Ca.
I use the calculater almost every day.It does everything I need it to.
Industrial Form Carpenter
User: Berlin Pierpoint from Beechmont Ky
Great Job; Does Everything I Need; Thanks
Construction Master Pro
User: Nils Vonhoff of Selmers bv from Beverwijk, Holland
I am working with the calculator every day.
User: Charles from Barbados
it a great product, it makes mountains look like mole heaps,its piece of tool everyone in the construction field must have .
User: Cornelius Ware from Chicago, IL
It needs the other exponent button, not x2 but x-1. I am using it for the engineer field and I might buy another one (the bigger one of course). Everything else is on the money.
User: Jose A. Victoria of Alliance Engineering from Denver, Co.
I'm happy with my calculator save me a lot of time to convert fractions. I will love to buy that one with scientific calculations!!! Or you can send it to me for free
construction master pro
User: Rock Gagné from Québec, canada
je suis tres tres satisfait de mon achat tres rapide et precise et evite beaucoup de calcul fastidieux je la recommande a tous !
User: james braddish from ireland
the calculator is excellent and the work book can help work out other problems that you didnt think the calculator could do...
User: Carlos of DELC CONSTRUCTIOL,LLC from Del Castillo
One of the best tool to work easy and fast, I have one long time ago it works perfect and accrate.
User: Bruce Hartford from Garden Grove, CA
Thank you a million times over! That's about how many times I have used it in the field to calculate all kinds of numbers in feet and inches. This gem has saved me a lot of money and is a no-brainer for anyone working in the field.
User: Richard from Moranis
and I had to get another. It's hard to believe that I am so relient on it now. This calculator is a god send.
User: Tim Newsome from Martinez, GA
I use it on every house. I just tote it like I do nails in my nail apron. You really need one if you are going to put rafters on a house. It's just hightly invaluvable. You figure up the measurements one time and you cut the rafters. You don't have to check them.