> ## Documentation Index
> Fetch the complete documentation index at: https://parabola.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# How do I calculate percentiles in Parabola?

> You can use the **Custom transform** step to calculate a percentile. Drag a **Custom transform** step to your canvas, and in the step instructions write: "Calculate the percentile rank of each number in X column."