---
product_id: 51804280
title: "4050 Construction Master 5 Construction Metric and Imperial Calculator for Contractors, Estimators, Builders and Carpenters,Black"
brand: "calculated industries"
price: "KSh24151"
currency: KES
in_stock: true
reviews_count: 13
category: "Calculated Industries"
url: https://www.desertcart.co.ke/products/51804280-4050-construction-master-5-construction-metric-and-imperial-calculator-contractors
store_origin: KE
region: Kenya
---

# Dual Metric & Imperial units Long-life dual LR44 batteries included Instant right-angle & rafter calculations 4050 Construction Master 5 Construction Metric and Imperial Calculator for Contractors, Estimators, Builders and Carpenters,Black

**Brand:** calculated industries
**Price:** KSh24151
**Availability:** ✅ In Stock

## Summary

> 📐 Build smarter, not harder — your ultimate construction sidekick!

## Quick Answers

- **What is this?** 4050 Construction Master 5 Construction Metric and Imperial Calculator for Contractors, Estimators, Builders and Carpenters,Black by calculated industries
- **How much does it cost?** KSh24151 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/51804280-4050-construction-master-5-construction-metric-and-imperial-calculator-contractors)

## 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

- • **Ready Out of the Box:** Includes batteries, bilingual reference guides, and a 1-year warranty—work smarter from day one.
- • **Waste Less, Save More:** Precision estimating for roofing, drywall, concrete, and lumber cuts costly material waste.
- • **Field-Proven Durability:** Compact, lightweight design with protective slide cover built for on-site hustle.
- • **Built-In Construction IQ:** Instantly solve complex layouts—stairs, rafters, slopes, and arches—without breaking a sweat.
- • **Master Every Measurement:** Seamlessly switch between meters, feet, inches, and yards for flawless dimensional accuracy.

## Overview

The Calculated Industries 4050 Construction Master 5 is a professional-grade calculator designed for contractors, estimators, builders, and carpenters. It supports both metric and imperial units, offers specialized functions for complex construction math including stair layouts and rafter calculations, and helps reduce material waste with precise volume and area estimations. Powered by two long-life LR44 batteries and protected by a durable slide cover, it’s a reliable tool that streamlines on-site and office workflows, backed by a one-year limited warranty.

## Description

Calculated Industries 4050 Construction Master 5 Construction Metric and Imperial Calculator for Contractors, Estimators, Builders and Carpenters,Black : desertcart.co.uk: Stationery & Office Supplies

Review: makes marking out a breeze - a great piece of kit for anyone to have. makes marking out and finding quantities and volumes a doddle
Review: Brilliant tool - Great tool for construction, I’ll be using this to build my staircase, used it for a few jobs already, it’s great.

## Features

- SOLVE ALL YOUR DIMENSIONAL MATH quickly and accurately with the calculator's powerful built-in solutions for completing layouts, plans, bids, estimates and more, directly in Metric or Imperial units
- LETS YOU EFFORTLESSLY WORK IN AND CONVERT between all common building dimension formats; Meters, milimetres, centimetres, feet-inch-fractions, decimal feet-inches, and yards including area and volume
- 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. Find volumes for concrete driveways, columns and more. Arched rake-walls with on-center spacing in ascending or descending order"
- INVALUABLE' TOOL PAYS FOR ITSELF DAILY by reducing headaches, saving time and preventing expensive material errors on all your projects, from the office to the field. Comes with a protective plastic slide cover, pocket reference guides in English and Spanish, two LR44 long-life batteries and a full one-year limited warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0008GO6A6 |
| Batteries | 2 LR44 batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Lithium Manganese Dioxide |
| Best Sellers Rank | 153,490 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 63 in Financial & Business Calculators |
| Colour | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (216) |
| Date First Available | 12 Mar. 2007 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Display style | LCD |
| Item Package Quantity | 1 |
| Item Weight | 170 g |
| Item model number | 4050 |
| Manufacturer | Calculated Industries |
| Material | Plastic |
| Part Number | 4050 |
| Power Source | Battery Powered |
| Product Dimensions | 15.24 x 7.62 x 2.54 cm; 170 g |

## Product Details

- **Brand:** Calculated Industries
- **Calculator Type:** Engineering/Scientific
- **Colour:** Black
- **Display type:** LCD
- **Material:** Plastic
- **Model name:** Construction Master 5
- **Number of batteries:** 2 LR44 batteries required. (included)
- **Power source:** Battery Powered
- **Screen size:** 2.5 Inches
- **UPC:** 098584040505 791836793418 733353054665 767674984707

## Images

![4050 Construction Master 5 Construction Metric and Imperial Calculator for Contractors, Estimators, Builders and Carpenters,Black - Image 1](https://m.media-amazon.com/images/I/715GOBDpX9L.jpg)

## Questions & Answers

**Q: Can this calculate the forms for a concrete stairs**
A: Yes it's the same as normal timber stairs just add the width of the stairs to you calculation.

## Customer Reviews

### ⭐⭐⭐⭐⭐ makes marking out a breeze
*by A***R on 24 November 2023*

a great piece of kit for anyone to have. makes marking out and finding quantities and volumes a doddle

### ⭐⭐⭐⭐⭐ Brilliant tool
*by P***6 on 2 October 2023*

Great tool for construction, I’ll be using this to build my staircase, used it for a few jobs already, it’s great.

### ⭐⭐⭐⭐⭐ Best thing ever, in the history of ever ness!
*by G***. on 1 May 2020*

I love this construction masker calculator! I purchase a lot through amazon, this is, with out question my best purchase to date! There are tons of great videos out there to show you how to use, and how to customise! The main reason I like this particular model, is down to the fact I can use it in Metric. Being in the uk we use both matrix and imperial, this is so versatile I can use it interchangeably. A must have!!!!

## Frequently Bought Together

- Calculated Industries 4050 Construction Master 5 Construction Metric and Imperial Calculator for Contractors, Estimators, Builders and Carpenters,Black
- Calculated Industries 2140 Construction Master Pro Workbook and Study Guide | 4 Comprehensive Sections | Site Development | Footings, Slabs, Walls | Framing | Finishing |Practice Problems, Answers
- Barnwell Pair of Brass Stair Gauges for Framing Carpenters Square

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**Shop now:** [https://www.desertcart.co.ke/products/51804280-4050-construction-master-5-construction-metric-and-imperial-calculator-contractors](https://www.desertcart.co.ke/products/51804280-4050-construction-master-5-construction-metric-and-imperial-calculator-contractors)

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-02-25*