-40 Celsius in Fahrenheit = -40°F

-40 degrees Celsius — Ponto onde °C = °F

°C
°F

(-40 × 9/5) + 32 = -40°F

Quick answer
-40°C = -40°F. Multiply by 9/5 then add 32.

Reference points

-40°C = -40°F
Ponto onde °C = °F
0°C = 32°F
Freezing point
37°C = 98.6°F
Body temp
100°C = 212°F
Boiling point

Nearby conversions

-44°C → -47.2°F -43°C → -45.4°F -42°C → -43.6°F -41°C → -41.8°F -39°C → -38.2°F -38°C → -36.4°F -37°C → -34.6°F -36°C → -32.8°F

Frequently asked questions

What is -40 degrees Celsius in Fahrenheit?
-40°C equals -40°F. This is calculated using the formula: °F = (°C × 9/5) + 32.
How do I convert -40°C to Fahrenheit?
Multiply -40 by 9 divided by 5 (which equals -72.0), then add 32. The result is -40°F.
Is -40°C hot or cold?
At -40°C (-40°F), this is extremely cold — well below freezing and dangerous without proper clothing.
What is the formula to convert Celsius to Fahrenheit?
The formula is: °F = (°C × 9/5) + 32. You can also use the approximation: double the Celsius value and add 30 for a quick estimate.