# Fermi problem

> English word · Noun

## Definitions
1. Any estimation problem designed to teach dimensional analysis or the approximation of extreme scientific calculations: often a back-of-the-envelope problem with limited data.

## Etymology
Named after Enrico Fermi, known for his ability to deal with such problems.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/fermi-problem