---
product_id: 1144759
title: "4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers, Renovators and Carpenters"
brand: "calculated industries"
price: "S$107"
currency: SGD
in_stock: true
reviews_count: 13
category: "Calculated Industries"
url: https://www.desertcart.sg/products/1144759-4065-construction-master-pro-advanced-construction-math-feet-inch-fraction
store_origin: SG
region: Singapore
---

# Material waste reduction Multi-format dimension conversions Time-saving built-in functions 4065 Construction Master Pro Advanced Construction Math Feet-inch-Fraction Calculator for Contractors, Estimators, Builders, Framers, Remodelers, Renovators and Carpenters

**Brand:** calculated industries
**Price:** S$107
**Availability:** ✅ In Stock

## Summary

> 📏 Nail every measurement, every time — the pro’s secret weapon!

## Quick Answers

- **What is this?** 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?** S$107 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/1144759-4065-construction-master-pro-advanced-construction-math-feet-inch-fraction)

## 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

- • **Precision Meets Speed:** Solve complex dimensional math instantly with award-winning accuracy.
- • **Universal Unit Mastery:** Effortlessly switch between feet-inch-fractions, decimal feet, yards, and metric units.
- • **Waste Less, Build More:** Integrated material estimators prevent costly overbuying and reduce jobsite waste.
- • **Built-In Geometry Genius:** Instant right-angle, rafter, slope, and stair layout solutions save hours on site.
- • **Trusted Industry Standard:** Used and recommended by pros for over 30 years, ensuring reliability and confidence.

## Overview

The Construction Master Pro Model 4065 is a handheld, battery-powered construction calculator designed for professionals who demand precision and efficiency. It supports multiple building dimension formats and offers advanced built-in functions for angles, rafters, stairs, and material estimation, helping reduce waste and speed up project workflows. With over 30 years as the industry standard and a 4.8-star rating from thousands of users, it’s the trusted tool for carpenters, framers, and craftsmen aiming for flawless results.

## 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.

Review: Quality, reliability, good product - It is has a good used
Review: Accurate, time-saving construction calculator - I’ve had this construction calculator for a while now and absolutely love it. I use it most often for roof pitch calculations and for confirming square, and it’s been consistently accurate. Once you get the hang of how it works, it’s quick, easy, and very efficient. It really saves time compared to doing everything manually or double-checking with other methods. One project where it really stood out was laying out a rake wall with studs at 16 inches on center. The calculations made it easy to get perfect saw cuts so everything nailed up cleanly and matched the pitch exactly. I would definitely recommend this calculator for any construction use. It’s a great tool that earns its place on the jobsite.

## 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 | #3,001 in Office Products ( See Top 100 in Office Products ) #8 in Scientific Calculators |
| Color | Silver |
| Customer Reviews | 4.8 4.8 out of 5 stars (4,792) |
| 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

![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)

## Available Options

This product comes in different **Pattern, Style** options.

## 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

### ⭐⭐⭐⭐⭐ Quality, reliability, good product
*by G***Z on January 25, 2026*

It is has a good used

### ⭐⭐⭐⭐⭐ Accurate, time-saving construction calculator
*by K***N on February 3, 2026*

I’ve had this construction calculator for a while now and absolutely love it. I use it most often for roof pitch calculations and for confirming square, and it’s been consistently accurate. Once you get the hang of how it works, it’s quick, easy, and very efficient. It really saves time compared to doing everything manually or double-checking with other methods. One project where it really stood out was laying out a rake wall with studs at 16 inches on center. The calculations made it easy to get perfect saw cuts so everything nailed up cleanly and matched the pitch exactly. I would definitely recommend this calculator for any construction use. It’s a great tool that earns its place on the jobsite.

### ⭐⭐⭐⭐⭐ 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

## 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 Singapore*
*Store origin: SG*
*Last updated: 2026-03-08*