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Calculated Industries 4050 Construction Master 5 Construction Calculator

4.7 out of 5 stars 44 customer reviews
List Price: $69.95
Price: $49.99 & FREE Shipping. Details
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  • Enter your model number above to make sure this fits.
  • Linear, area and volume solutions: convert dimensions, including metric
  • Complete rafter, roof and framing solutions, hip/valley, jacks and rake walls
  • Stair solutions are nearly automatic; risers, treads, stringer, incline
  • Built-in right-angle solutions; automatic square-ups
  • Circular and arc calculations; areas, diameters, circumference
› See more product details
12 new from $49.99
$49.99 & FREE Shipping. Details In Stock. Sold by SupplyKick and Fulfilled by Amazon. Gift-wrap available.

Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you'll especially enjoy: FBA items qualify for FREE Shipping and .

If you're a seller, Fulfillment by Amazon can help you increase your sales. We invite you to learn more about Fulfillment by Amazon .

Frequently Bought Together

  • Calculated Industries 4050 Construction Master 5 Construction Calculator
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Total price: $64.94
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Product Information

Technical Details

Part Number 4050
Item Weight 5.9 ounces
Product Dimensions 6 x 3 x 1 inches
Item model number 4050
Batteries 1 CR2 batteries required. (included)
Power Source battery-powered
Item Package Quantity 1
Batteries Included? Yes
Batteries Required? Yes
Warranty Description Calculated Industries warrants product against defects in materials and workmanship for a period of 1 year. If a defect exists during the warranty period, CI at its option will either repair or replace the product at no charge
National Stock Number 5305-01-478-1184

Technical Specification

User Guide [pdf ]

Additional Information

ASIN B0008GO6A6
Customer Reviews
4.7 out of 5 stars 44 customer reviews

4.7 out of 5 stars
Best Sellers Rank #23,434 in Home Improvements (See top 100)
#19 in Electronics > Office Electronics > Calculators > Financial & Business
#18,000 in Office Products > Office Supplies
Shipping Weight 11.2 ounces (View shipping rates and policies)
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available June 8, 2005

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Customer Reviews

Top Customer Reviews

5.0 out of 5 starsBest feet / inch / fraction calculator!
By Martin J. Anderson on January 13, 2006
Having tried many feet/inch/fraction calculators, I must say this is by far the easiest to use, and the case it comes in can take a beating while protecting the keypad. There's even a compartment to keep the operator's manual with the calculator and protected (which you will use on occasion for calculations that you don't do every day). I have had the predecessor to this model, the Construction Master 4 for years, use it daily, and still have never had to change the battery.
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5.0 out of 5 starsSucessful User for Over 12 years
By Michael N. Jones on December 27, 2005
My Dad and myself run a construction company and we have used this products for well over 12 years, the best part of this is that it is used the way you think...example is a 3 FEET, 2 INCH, 11/16 mesure is typed in the same way as its said.

Great product, we break or loose more than we wear out, excellent product..buy one today.
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4.0 out of 5 starsConstruction Master V
By JW on March 9, 2006
The price and service from Amazon was superior to anything I've used on the internet. The calculator also has exceeded my expectations ( I had used the Construction Master IV for 8 years, until it just wouldn't work any more ). I would recommend to anyone both the service and product provided here.
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5.0 out of 5 starsContinues the heritage
By Michael Stevenson on January 15, 2007
I've used these since the original Measure Master Plus, which still is operating, and my only wish is they would add a percentage key to make it be an everyday calculator.
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5.0 out of 5 starsgreat time saver
By Clayton F. Law on May 2, 2009
After avoiding buying a construction calculator for years, mainly justifying $50 for something that didn't have a blade attached to it, I finally bought this calculator and it has transformed the way I estimate, frame, roof, etc... I wish I had bought this calculator 8 years ago. It has survived a drop from the top of a huge, steep roof sliding 18 feet then free falling to the deck 12 feet below with the only damage being a broken hinge on the cover. Still works like new even a year after the fall.
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1.0 out of 5 starsBuy a IV instead
By Paul Tucker on January 27, 2016
Verified Purchase
I had my Construction Master IV for at least ten years. Loved it. Then I misplaced it and bought this Construction Master V to replace it. I had it less than a week when it fell off the workbench and the screen was destroyed. I just bought another IV because it was a much sturdier calculator with a much nicer protective cover. This V is a lightweight and fragile version of a much better calculator. The sliding case was also a pain to open compared to the old IV cover. I don't think V is an improvement over IV.
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5.0 out of 5 starsGreat for construction
By Donna on March 6, 2015
Verified Purchase
My son in law is a framing contractor and uses this to calculate roof pitch and lumber needed based on size of the house. He has had one of these for years, the only reason I needed to get him another one is he worn the print off of the keys. It is great for construction and he has never had one break.
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5.0 out of 5 starsMy brain stoped hurting!
By Erik R. on August 4, 2013
Verified Purchase
This calculator is awesome. I thought it might be handy but, now, I can't imagine being without it.

It used to be that subtracting 8ths from 16ths with all the lowest common denominator and borrowing and converting between fractions and decimals just made my head hurt.

I can not recommend this highly enough. If you do any work requiring measuring and calculating, based on some dead king's pinky finger, you need to get one of these!
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Most Recent Customer Reviews

5.0 out of 5 starsI have used this product before and if your in ...

I have used this product before and if your in the field or doing take-off's this is the right tool. Quality and durable

Published 8 days ago by Terri L Leedy
5.0 out of 5 starsFive Stars

good I recomended

Published 16 days ago by Amazon Customer
5.0 out of 5 starsMoney well spent

Worth the money. Worked great for construction management classes

Published 17 days ago by Dave
5.0 out of 5 starsFive Stars

Husband loved it!

Published 29 days ago by Amazon Customer
4.0 out of 5 starsBesides that the calculators work great.

I bought two calculators for my office and one of the two arrived with 2 Pocket Reference Guides both in Spanish. Read more

Published 1 month ago by M & M
5.0 out of 5 starsOne of the most important tools I have in my ...

One of the most important tools I have in my office. This one, I bought for my field office, so that I have one in each office

Published 2 months ago by Andrew Baranello
5.0 out of 5 starsFive Stars

Wonderful, will get a lot of use around here for all our building projects.

Published 3 months ago by Wolfe F.
5.0 out of 5 starsheavy duty love

Does everything you need it too! This is a must buy if your building stairs! great quality and has held up for a few years

Published 3 months ago by Mrs Cooper
5.0 out of 5 starsFive Stars

Excellent tool for contractors and for people that use Metric system

Published 3 months ago by maximo
5.0 out of 5 stars... uses it all of the time and it works like from the

hubby uses it all of the time and it works like from the store

Published 3 months ago by Rachel Monzo

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