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Fahrenheit to Celsius

Convert Fahrenheit to Celsius, with the math shown step by step.

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Degrees Celsius
40 °C

104 °F = 40 °C

Also equals

How it works

°C = (°F − 32) ÷ 1.8

Water freezes at 32 °F, which is 0 °C, so first take away 32. Then divide by 1.8, because a Celsius degree is 1.8 times as big as a Fahrenheit degree. A quick check: an oven at 350 °F is about 177 °C.

  1. Subtract 32 104 − 32 = 72
  2. Divide by 1.8 (that is 9/5) 72 ÷ 1.8 = 40 °C

Nearby values

Degrees Fahrenheit Degrees Celsius Kelvins
101 °F 38.33 °C 311.48
102 °F 38.89 °C 312.04
103 °F 39.44 °C 312.59
104 °F 40 °C 313.15
105 °F 40.56 °C 313.71
106 °F 41.11 °C 314.26
107 °F 41.67 °C 314.82

Printed from rocketcalc.io/temperature/fahrenheit-to-celsius/104