Three Fermi questions a day — estimate hard-to-know numbers with napkin math and get scored on how many times off you were.
Fermi is a daily estimation puzzle built on Fermi estimation — the trick of chaining rough assumptions to get within an order of magnitude of a number nobody carries around in their head. Each day brings three questions, answered with gut instinct, napkin math, and the built-in calculator rather than a search engine. Scoring is a multiple of the real answer, so being 1.45× off beats being 10× off, and every reveal shows worked example math plus the distribution of how everyone else guessed. Results are shareable, and players can submit questions of their own.
Fermi is a daily estimation puzzle built on Fermi estimation — the trick of chaining rough assumptions to get within an order of magnitude of a number nobody carries around in their head. Each day brings three questions, answered with gut instinct, napkin math, and the built-in calculator rather than a search engine. Scoring is a multiple of the real answer, so being 1.45× off beats being 10× off, and every reveal shows worked example math plus the distribution of how everyone else guessed. Results are shareable, and players can submit questions of their own.
Tags: Trivia, Daily Game, Estimation, Math
Try FermiAn estimation question you answer by reasoning from rough assumptions rather than looking it up — named after Enrico Fermi, who famously estimated the strength of an atomic blast from how far paper scraps flew.
By how far off you were as a multiple of the real answer — landing within 1.5× scores far better than being 10× out.
Yes — three questions a day, free in the browser.