Metric System

Celsius

Définition

Une échelle de température métrique où 0 °C correspond au point de congélation de l'eau et 100 °C à son point d'ébullition sous pression atmosphérique standard (101,325 kPa).

Explication

Named after Swedish astronomer Anders Celsius, who proposed the scale in 1742. Convert to Fahrenheit: °F = (°C × 9/5) + 32; to Kelvin: K = °C + 273.15. Key reference points: −40°C equals −40°F (the only temperature where both scales agree); body temperature is 37°C (98.6°F); a comfortable room is 20–22°C (68–72°F). Celsius is the official temperature unit in 195 of 197 countries.

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