---
title: "L1 vs L2 Norms"
description: "Measure [3, 4] as 7 and as 5, see which length each norm uses, and why the common L2 penalty is the squared norm. Compares the Ridge and Lasso penalties."
canonical_url: "https://fanout.sh/ai/lessons/core-ai-intuitions-l1-l2-norms"
md_url: "https://fanout.sh/ai/lessons/core-ai-intuitions-l1-l2-norms.md"
access: "pro-preview"
---

# L1 vs L2 Norms

Measure [3, 4] as 7 and as 5, see which length each norm uses, and why the common L2 penalty is the squared norm. Compares the Ridge and Lasso penalties.

- Access: Fanout Pro (public preview)
- Module: Core AI Intuitions

## A glimpse of L1 vs L2 Norms

Take a movement of 3 units right and 4 units up. A route along the grid uses 3 + 4 = 7 units. A straight line from start to finish has length √(3² + 4²) = 5.

Both numbers describe the same movement, [3, 4], using different rules for length. Those rules are the L1 norm and L2 norm.

## Continue learning

Pro unlocks guided learning, complete notes, practical walkthroughs, exercises, and every AI Research lesson.

---
This representation contains public Fanout content only. Protected Pro lessons, account data, billing, checkout, and pricing are not included.

Browse the public content map: https://fanout.sh/sitemap.md