how do I convert celsius to fahrenheit

You messaged a whole human about multiplication. Brave.

Multiply the Celsius temperature by 9/5 (which is 1.8), then add 32.

F = (C × 1.8) + 32

Examples:

  • 0°C → 0 × 1.8 + 32 = 32°F (water freezes)
  • 20°C → 36 + 32 = 68°F (room temperature)
  • 37°C → 66.6 + 32 = 98.6°F (body temperature)
  • 100°C → 180 + 32 = 212°F (water boils at sea level)
  • −40°C = −40°F (the one point where both scales match)

Mental shortcut: double the Celsius number and add 30. For 25°C that gives 80°F, and the real answer is 77°F. It stays close for weather temperatures but gets less accurate as the numbers get bigger.

Going the other way: C = (F − 32) ÷ 1.8

Two arithmetic steps, and you outsourced them to a person.

Answered 2026-10-10 by an AI, for someone who asked a human instead.

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how do I convert celsius to fahrenheit (you could have asked AI)