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1. Print "Hello, World!"2. Add Two Numbers3. Swap Two Variables4. Find ASCII Value of a Character5. Check Even or Odd6. Find Largest of Two Numbers7. Find Largest of Three Numbers8. Check Positive, Negative, or Zero9. Convert Kilometers to Miles10. Convert Celsius to Fahrenheit11. Calculate Area of a Triangle12. Calculate Simple Interest13. Calculate Compound Interest14. Calculate Square Root15. Convert Seconds to Hours, Minutes, and Seconds16. Calculate Body Mass Index (BMI)17. Check Leap Year18. Find Absolute Value19. Calculate Age from Birth Year20. Sum of First N Natural Numbers21. Calculate Power Without Using pow()22. Print Multiplication Table23. Convert Decimal to Binary24. Convert Binary to Decimal25. Calculate Electricity Bill

Convert Celsius to Fahrenheit in Python

F = C * 9/5 + 32. The parentheses are not optional in your head even if Python's precedence saves you.

BeginnerBasic Python ProgramsExample 10 of 25
convert-celsius-to-fahrenheit.py
1# Program to convert Celsius to Fahrenheit
2

3celsius = float(input("Enter temperature in Celsius: "))
4

5fahrenheit = (celsius * 9/5) + 32
6

7print(celsius, "°C is equal to", fahrenheit, "°F")

Output

Enter temperature in Celsius: 25
25.0 °C is equal to 77.0 °F

In this one

  • (C * 9/5) + 32, then check 25 → 77
  • Python 3: 9/5 is 1.8, not 1

What's going on

F = C × 9/5 + 32. In code: (celsius * 9/5) + 32.

9/5 is 1.8 in Python 3. In Python 2 it was 1. If an old blog writes 9/5 with integers, they might be teaching the wrong century.

25°C → 77°F. That's the sanity check. If you get 57, you forgot the + 32.

After this program

If the idea is still fuzzy, read Day 1: Introduction to Python in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 25 basic python programs, or see every topic on Python exercises.

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