Before you play
Estimate three hard-to-picture numbers each day in Flatwhite Studios’ Fermi puzzle. Submit one guess per question and compare it with the revealed answer.
A daily estimate and answer reveal were checked on October 12, 2026. The site describes lower error multiples as better scores; final daily scoring and persistent stats were not verified.
How to get started
- Select Play Today’s on fermi.gg to open the daily set.
- Enter a numerical estimate and choose Lock it in. Read the revealed answer before moving to the next question.
What you need
Ready to startThe first daily question can be answered without signing in. The site offers past puzzles and a player panel; long-term streak storage and account synchronization were not verified.
Controls
Type a number in your guess and select Lock it in, or press Enter. Open calculator provides an in-game calculator; Question 2 moves to the next prompt.
Questions before you play
Do I need an account, and is progress saved?
The first daily question can be answered without signing in. The site offers past puzzles and a player panel; long-term streak storage and account synchronization were not verified.
What are the current limitations?
A daily estimate and answer reveal were checked on October 12, 2026. The site describes lower error multiples as better scores; final daily scoring and persistent stats were not verified.
