Fermi Estimation

You can estimate almost anything within an order of magnitude by breaking it into factors you can roughly guess. The point isn't precision — it's knowing whether an answer is in the ballpark or on another planet.

Featured In

Browse all mental models

Loading...
Mental models, decoded from real events

See the hidden forces behind the events that shaped the world — and build a mind that spots them everywhere.

Categories

Scenarios

All Models

🔍

Your Progress