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40 °C to °F

40 degrees Celsius in degrees Fahrenheit
40 °C = 104 °F
°F = °C × 9/5 + 32

40 degrees Celsius is 104 degrees Fahrenheit. To get there, use °F = °C × 9/5 + 32.

Values either side

Degrees Celsius near 40, converted to degrees Fahrenheit.
Degrees Celsius Degrees Fahrenheit
32 °C 89.6
35 °C 95
36 °C 96.8
37 °C 98.6
40 °C ← 104
45 °C 113
50 °C 122
55 °C 131
60 °C 140

How the conversion works

The relationship is °F = °C × 9/5 + 32. Both units measure temperature, so the conversion is a fixed formula that never changes. Temperature scales are the one common case where converting is not just multiplication — Celsius and Fahrenheit each put their zero in a different place, so an offset is applied as well as a scale factor.

Common questions

What is 40 °C in degrees Fahrenheit?
40 °C is 104 °F.
How do you convert degrees Celsius to degrees Fahrenheit?
Use °F = °C × 9/5 + 32.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked