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Celsius to Fahrenheit

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

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Degrees Fahrenheit
104 °F

40 °C = 104 °F

Also equals

How it works

°F = °C × 1.8 + 32

A Fahrenheit degree is smaller than a Celsius degree: 1 °C equals 1.8 °F (9/5). The scales also start in different places, since water freezes at 0 °C but at 32 °F. So multiply by 1.8, then add 32. A quick check: 20 °C, a comfortable room, is 68 °F.

  1. Multiply by 1.8 (that is 9/5) 40 × 1.8 = 72
  2. Add 32 72 + 32 = 104 °F

Nearby values

Degrees Celsius Degrees Fahrenheit Kelvins
37 °C 98.6 °F 310.15
38 °C 100.4 °F 311.15
39 °C 102.2 °F 312.15
40 °C 104 °F 313.15
41 °C 105.8 °F 314.15
42 °C 107.6 °F 315.15
43 °C 109.4 °F 316.15

Printed from rocketcalc.io/temperature/celsius-to-fahrenheit/40