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-40°F to Celsius

-40°F = -40°C

Nearby temperatures

FahrenheitCelsius
-44°F-42.22222°C
-43°F-41.66667°C
-42°F-41.11111°C
-41°F-40.55556°C
-40°F-40°C
-39°F-39.44444°C
-38°F-38.88889°C
-37°F-38.33333°C
-36°F-37.77778°C

The formula

°C = (°F − 32) × 5/9

About the scales

Fahrenheit — The Fahrenheit scale puts water’s freezing point at 32° and its boiling point at 212°, and is used mainly in the United States.

Celsius — The Celsius scale puts the freezing point of water at 0° and its boiling point at 100° at standard pressure.

Frequently asked questions

What is -40°F in Celsius?

-40°F is -40°C.

Is -40°F hot or cold?

Very cold — well below freezing.

Convert other temperatures

Full Fahrenheit to Celsius converter