Studio Labeling Units (LUs) Explained

What are Labeling Units (LUs)?

Labeling Units is Scale Studio's tracking of annotation usage. Most annotations are 1 LU, though there are a few exceptions that will be described in more detail in this page.

How many LUs do I have?

The best way to check how many LUs you have is to visit this link after logging in:

What is the conversion of annotations to LUs?

Project Type
Annotation Type and LUs

General Image Annotation

Geometries (bounding boxes, polygons, etc.) - 1 LU
Attributes - 0.5 LU

2D Semantic Segmentation

Instances - 1 LU
Attributes - 0.5 LU

Text Collection / Categorization

Fields - 1 LU
Every 1 min of audio - 1 LU
Every 1 min of video - 1 LU

Document Transcription

Annotations - 1 LU
Links - 0.5 LU

Named Entity Recognition (NER)

Annotations - 1 LU
Relationships - 0.5 LU

Video Playback Annotation

Geometries - 0.25 LU
Attributes - 0.1 LU
Events - 1 LU


Annotations - 7 LU
Attributes - 2 LU

If you have any questions on your project, send us an email at

Updated 8 days ago