---
title: "3D ruler"
description: "How to use the 3D ruler with BIM Takeoff"
url: https://help-takeoff.kreo.net/en/articles/5720813-3d-ruler
collection: "3D"
updated: 2026-07-17
language: en
alternates: [fr]
---

# 3D ruler

How to use the 3D ruler with BIM Takeoff

Use the 3D ruler to check accuracy of measurements.  
  
Press "R" button to activate 3D Ruler.  
Draw the outline with the left click (right-click closes the outline).

![outline](https://staticfiles.gleap.io/helpcenter/6874f791a81bb9196b315e05/20250715091043_8541.gif)

Hold "Ctrl" button to turn on snapping.

![snapping](https://staticfiles.gleap.io/helpcenter/6874f791a81bb9196b315e05/20250715091044_5272.gif)

Press "C" button to apply a сlip box with dimensions to the selected element.

![clip-box](https://staticfiles.gleap.io/helpcenter/6874f791a81bb9196b315e05/20250715091043_4510.png)

Right-click on a clip box dimension turns on the grid.

![grid](https://staticfiles.gleap.io/helpcenter/6874f791a81bb9196b315e05/20250715091044_5564.png)

## Related

- [Does Kreo support the imperial unit system?](https://help-takeoff.kreo.net/en/articles/5720826-does-kreo-support-the-imperial-unit-system.md)
- [The Functions of 3D](https://help-takeoff.kreo.net/en/articles/5717366-the-functions-of-3d.md)
- [How can I check the accuracy of measurements in the model?](https://help-takeoff.kreo.net/en/articles/5714022-how-can-i-check-the-accuracy-of-measurements-in-the-model.md)
- [How to work with Clip Box in Kreo BIM Takeoff](https://help-takeoff.kreo.net/en/articles/5720741-how-to-work-with-clip-box-in-kreo-bim-takeoff.md)