Guides

To get better at any estimation game, and to understand why it is so hard.

How to estimate any number without knowing itFermi estimation step by step: break the problem down, set bounds and multiply orders of magnitude.
Why we're so bad with big numbersOur number sense is logarithmic, the first number we hear drags us along, and we trust ourselves far too much.
The wisdom of crowdsWhy the average of many estimates beats almost any single person, and when it stops working.