---
product_id: 1144759
title: "Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers, Renovators and Carpenters"
brand: "calculated industries"
price: "777 kr"
currency: DKK
in_stock: true
reviews_count: 13
category: "Calculated Industries"
url: https://www.desertcart.dk/products/1144759-calculated-industries-4065-construction-master-pro-advanced-construction-math-feet
store_origin: DK
region: Denmark
---

# Accurate material waste prevention All building dimension formats Time-saving built-in functions Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers, Renovators and Carpenters

**Brand:** calculated industries
**Price:** 777 kr
**Availability:** ✅ In Stock

## Summary

> 📏 Build smarter, faster, and waste less with the Construction Master Pro!

## Quick Answers

- **What is this?** Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers, Renovators and Carpenters by calculated industries
- **How much does it cost?** 777 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/1144759-calculated-industries-4065-construction-master-pro-advanced-construction-math-feet)

## Best For

- calculated industries enthusiasts

## Why This Product

- Trusted calculated industries brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Powerhouse:** Lightweight handheld design with a large 11-digit display and long-lasting battery for all-day jobsite use.
- • **Paperless Tape Recall:** Review your last 20 entries anytime to double-check calculations and avoid costly errors.
- • **Waste Less, Save More:** Built-in material estimators prevent costly overbuying on roofing, drywall, studs, and lumber.
- • **Built-In Geometry Genius:** Instant solutions for rafters, slopes, stairs, and angles save you hours on complex layouts.
- • **Seamless Dimensional Mastery:** Effortlessly convert and calculate in feet-inch-fractions, yards, and metric units—no more guesswork.

## Overview

The Construction Master Pro Model 4065 is the industry-standard construction calculator trusted by professionals for over 30 years. It offers powerful built-in solutions for all common building dimension formats, advanced geometry functions for layouts and bids, and precise material estimations to reduce waste. Compact and battery-powered with a large display and memory recall, it’s designed to boost accuracy and efficiency on every project.

## Description

Product Description The Construction Master is and has been the industry standard for carpenters and craftsmen for over 30 years. Its use is taught in apprenticeship and training programs at the high-school, college, union and industry level across our country and beyond. An entire generation of framers and stick-builders grew up using it and advising us on new capabilities they wanted built-in. Building materials and techniques have changed over the years but geometry and the need to work quickly and accurately with dimensions is as important and difficult as ever. Put the time-tested Construction Master Pro on your next project and you’ll be glad you did. desertcart.com The construction master pro (model 4065) from Calculated Industries sets the industry standard for advanced construction-math calculators. Offering powerful built-in solutions and expanded preference settings, it's perfect for completing layouts, bids, and estimates as well as helping to save time and money by helping you figure out the right amount of needed materials. It's ideal for or contractors, estimators, architects, builders, framers, engineers, concrete/foundation contractors, draftspersons, and more. Ideal for completing layouts, bids, and estimates (view larger). Quick, Accurate Solutions in the FieldYou'll be able to work in and convert between all building dimensional formats--yards, feet-inch-fractions and metric--including area and volume. The construction master pro includes a number of built-in time-saving functions, including calculations for risers, treads, stringer length, and incline angle; how many 4 by 8, 4 by 9 or 4 by 12 sheets are needed to cover an area; jack rafter results for regular and irregular pitch roof; determining number of on-center studs for an entered length; and right angles. It also offers advanced solutions for circles, arches, columns, cones, pillars, windows and post-holes arcs, circumference, and segments.Handheld ConvenienceThe construction master pro also includes the ability to custom define your preferences (such as fractional settings), a "paperless" tape that lets you review the previous 20 entries to double-check your totals, and accumulating memory with three additional memory storage locations. It's powered by a two 1.5-volt batteries (LR-44/A76), and the Construction Master Pro has an auto shut-off feature that turns the calculator off after about 8 to 12 minutes of non-use. The 11-digit display measures 2.5 inches by .625 inches. Overall, the calculator measures 5.6 inches by 3 inches by .6 inches, and weighs 4.5 ounces. It's backed by a one-year limited warranty.What's in the BoxOne Calculated Industries 4065 construction master pro calculator, Armadillo Gear protective cover, pocket reference guide in English and Spanish, and batteries.4065 Construction Master Pro Calculator At a Glance:Work in and convert between all building dimensional formatsPerfect for completing layouts, plans, bids, and estimatesLarge 11-digit displayPowered by two LR-44/A76 batteriesOne-year limited warranty

Review: Good for anyone who does a lot of fractional adding. - Great product I have used the small handheld models for over 20 years and this works just as good and easier to see the numbers.
Review: Great product for builders - this is a great calculator for builders, but I recommended having a bigger display so you could see what has been entered . Measure twice cut once

## Features

- SOLVE ALL YOUR DIMENSIONAL MATH quickly and accurately with the award-winning CM Pro construction calculator’s powerful built-in solutions for completing layouts, plans, bids, estimates and more, directly in the building units you prefer
- LETS YOU EFFORTLESSLY WORK IN AND CONVERT between all common building dimension formats: feet-inch-fractions, decimal feet-inches, yards and metric -- including area and volume. Plus weight-per-volume and D:M:S to decimal degree conversions too
- TIME-SAVING BUILT-IN FUNCTIONS for right angles give you instant solutions for square-ups, rafters (hip, valley, jacks), rake-walls, slopes, angles and more. Plus complete stair layout, advanced solutions for arcs, arches, circles, columns and more
- PREVENTS COSTLY MATERIAL WASTE with built-in solutions for roofing, drywall, studs, blocks, concrete footings and board-feet lumber estimating. Plus compound miter functions help you avoid errors when working with crown molding and other pricey millwork

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0007Q3RGQ |
| Batteries | 2 LR44 batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | No |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #3,709 in Office Products ( See Top 100 in Office Products ) #11 in Scientific Calculators |
| Color | Silver |
| Customer Reviews | 4.8 4.8 out of 5 stars (5,735) |
| Date First Available | July 14, 2008 |
| Display Style | LCD |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 8.2 ounces |
| Item model number | 4065 |
| Manufacturer | Calculated Industries |
| Material | Plastic |
| Measurement System | metric |
| National Stock Number | 4820-01-299-7444 |
| Part Number | 4065 |
| Pattern | Calculator |
| Power Source | Battery Powered |
| Product Dimensions | 5.75 x 3 x 0.6 inches |
| Style | Handheld |
| Voltage | 1.5 Volts |
| Warranty Description | 1 year manufacturers |

## Product Details

- **Brand:** Calculated Industries
- **Calculator Type:** Construction/Building
- **Color:** Silver
- **Power Source:** Battery Powered
- **Screen Size:** 2.6 Inches

## Images

![Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers, Renovators and Carpenters - Image 1](https://m.media-amazon.com/images/I/71M5jQzqpsL.jpg)

## Questions & Answers

**Q: Looking for gift for roofer husband who just got licensed. Is this a good tool for a roofer?**
A: I got this for my husband and he tells me every time he uses it how much he loves it. It does everything that he needs. One of the best gifts ever. I use it a lot myself, so hope he will get me one soon.

**Q: I have a older version...maybe 5 yrs? Is this one more advanced?**
A: Thanks for your question.  There have been no significant changes to the Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator in the last 5 years other than the addition of the Armadillo Gear as standard.  If you have one that is no longer working, you can send it in for repair.

**Q: Does the CI 4065 pro delivered have an orange back or black back?**
A: the calculator it's self has a black back, i got mine with the armadillo gear cover and the main body including the back is orange but the flip cover face is a dark graykevin

**Q: Will it tell me the amount of concrete i need for a slab?**
A: Thanks for your question. The Calculated Industries Construction Master Pro Calculator will calculate cubic yards using the Length Width and Height keys. This is a great all around Construction Calculator, however if you are dealing primarily in concrete you might want to check out the Calculated Industries ConcreteCalc Pro as it has advanced rebar and column functionality. Here is the link: https://www.amazon.com/Calculated-Industries-ConcreteCalc-4225-Calculator/dp/B000VKD4B6/ref=sr_1_1?ie=UTF8&qid=1536678826&sr=8-1&keywords=concrete+calculator

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good for anyone who does a lot of fractional adding.
*by H***Y on December 13, 2025*

Great product I have used the small handheld models for over 20 years and this works just as good and easier to see the numbers.

### ⭐⭐⭐⭐⭐ Great product for builders
*by L***. on December 14, 2025*

this is a great calculator for builders, but I recommended having a bigger display so you could see what has been entered . Measure twice cut once

### ⭐⭐⭐⭐⭐ Much easier to use than the pocket version.
*by B***S on December 18, 2025*

Grudgingly ordered this after having to switch back to an older phone and the factory wipe removed my app only to find out it could not reload the app because CI doesn't support Andriod 11 anymore and wont allow access to older versions that did. This is a must for anyone doing desk work and currently using the app or pocket version. Larger display, larger hard buttons, much easier and more efficient to use. Hopefully more durable. Before going to the app I was going through the soft button pocket version at a rate of 1 per year.

## Frequently Bought Together

- Calculated Industries 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers, Renovators and Carpenters
- Aproca Hard Storage Travel Case, for Calculated Industries 4065 4080 Construction Master Pro Calculator (Case Only)
- Calculated Industries 2140 Construction Master Pro Workbook and Study Guide | 4 Comprehensive Sections | Site Development | Footings, Slabs, Walls | Framing | Finishing |Practice Problems, Answers

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-29*