-40 °F = -40 °C
-40 °F is -40 °C. To convert Fahrenheit to Celsius, subtract 32, then divide by 1.8. Change the number below for any other value.
- Kelvin
- 233.15 K
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Fahrenheit to Celsius near -40 °F
How it is worked out
°C = (°F − 32) × 5 ÷ 9
Equivalently: °C = (°F − 32) ÷ 1.8
(-40 °F − 32) ÷ 1.8 = -40 °C
Questions people ask
How many °C is -40 °F?
-40 °F is -40 °C.
How do I convert Fahrenheit to Celsius?
Subtract 32, then divide by 1.8. For example, (-40 °F − 32) ÷ 1.8 = -40 °C.