Historedia
Episode 2 of 2

Proposal of Inverted Centigrade Scale

When
1742
Where
Uppsala
Part of
Development of the Celsius Scale

Celsius proposed an inverted temperature scale in 1742 where 0 was boiling and 100 was freezing.

In 1742, Celsius proposed the centigrade scale to the Royal Society of Sciences in Uppsala. The scale was inverted, with 0 degrees representing the boiling point of water and 100 degrees representing the freezing point of water.

Sources

  1. Anders Celsius Wikipedia, revision of 2026-09-14
  2. Celsius Wikipedia, revision of 2026-09-04

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.