---
title: "Base Extractor in Kreo BIM Takeoff"
description: "What Base Extractor is and the easiest way to find out which Base Extractor you might need to add."
url: https://help-takeoff.kreo.net/en/articles/5726587-base-extractor-in-kreo-bim-takeoff
collection: "Breakdown Table"
updated: 2026-08-19
language: en
alternates: [fr]
---

# Base Extractor in Kreo BIM Takeoff

What Base Extractor is and the easiest way to find out which Base Extractor you might need to add.

Base Extractor is a mathematical algorithm that identifies the required numeric parameter of a 3D element.  
Each Base Extractor calculates a separate parameter. Read how to add Base Extractors [here.](https://www.kreo.net/qto-help/can-i-change-the-list-of-measurements-for-an-element)  
  
To understand which Base Extractor in particular you need:  
1\. Click on the Measurement Details tab at the very top of the Breakdown Table. Then you will be taken to [the article](https://www.kreo.net/qto-help/base-extractors-description) with detailed descriptions for each Base Extractor.

2\. Or start adding a new Base Extractor by selecting the relevant element and right-clicking on it. Then click on the i button near the name of any Base Extractor in the list and you will see its description. [⬇️](https://emojipedia.org/down-arrow/)

![what-base-extractor-is](https://staticfiles.gleap.io/helpcenter/6874f791a81bb9196b315e05/20250715091059_3021.gif)