This page is about the eponym Celsius


a temperature scale based on two fixed points with water freezing at 0°C (zero degrees Celsius) and boiling at 100°C. It is used in temperatures for weather, cooking and so on in most countries.

For example

  • It's supposed to be thirty degrees Celsius tomorrow. Let's go to the lake!

  • In Canada the weather forecasters use Celsius, but in the USA they use Fahrenheit.

Celsius is also known as "centigrade", meaning 100 steps.

Origin: Anders Celsius (1701-1744) was a Swedish professor of astronomy. In 1736, he joined a famous expedition (the Lapland expedition) to confirm that the earth flattened out around the poles. He also developed the idea behind the temperature scale that had two fixed points for boiling and freezing. This Celsius temperature scale was named after him, just as the Fahrenheit scale was named after German physicist Daniel Fahrenheit.

Quick Quiz

If the temperature outside is 1°C, it's

a. very cold

b. mild

c. boiling

Contributor: Tara Benwell