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Celsius (°C) - Definition and Overview

What is Celsius?

Celsius also called as Centigrade is the temperature scale based on 0° for freezing point for water and 100° for the boiling point of water. The symbol for celsius is °C.

Summary

  • The Celsius scale, also known as the centigrade scale, is a temperature scale used by the International System of Units (SI)
  • It is named after the Swedish astronomer Anders Celsius, who developed a similar temperature scale
  • The Celsius scale is based on the freezing point of water at 0 degrees and the boiling point of water at 100 degrees under standard atmospheric pressure
  • It is widely used around the world for most temperature measuring purposes.

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: June 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.