Celsius to Fahrenheit program in Python

The formula is F = C × 9 / 5 + 32. The program reads a number, applies the formula and prints the result.

The program

celsius = float(input("Temperature in Celsius: "))

fahrenheit = celsius * 9 / 5 + 32

print(f"{celsius}°C is {fahrenheit}°F")

Typed in this example: 37. Press Run to type your own.

Temperature in Celsius: 37
37.0°C is 98.6°F

How it works

• float(...) turns the typed text into a number that can have a decimal point, so 36.6 works as well as 37.
• Python follows normal maths order: the multiplication and division happen first, then + 32.

The other direction

To convert Fahrenheit to Celsius, reverse the steps: subtract 32, then multiply by 5 / 9.

fahrenheit = 212
celsius = (fahrenheit - 32) * 5 / 9
print(f"{fahrenheit}°F is {celsius}°C")

212°F is 100.0°C

Here the brackets matter: without them, Python would multiply 32 by 5 / 9 first.