Which temperature scale is the most commonly used?

The Celsius scale is the most commonly used temperature scale, particularly in scientific contexts and most countries around the world. It is based on the freezing point of water at 0 degrees and the boiling point at 100 degrees under standard atmospheric conditions, making it intuitive for everyday use. The scale is also widely adopted in the metric system, which is the standard measurement system in many countries.

In addition to its everyday practicality, Celsius is frequently employed in scientific research and applications, facilitating communication and data interpretation globally due to its universal acceptance. This scale is particularly advantageous in fields such as meteorology, chemistry, and physics, where temperature conversions to Celsius from other units are often required.

While the Fahrenheit scale is predominantly used in the United States for everyday weather reporting, and the Kelvin and Rankine scales are essential in specific scientific disciplines—like thermodynamics—Celsius remains the most accessible and widely utilized temperature scale for most people across various contexts.