C++ Exercises: Convert temperature in Kelvin to Celsius

Last update on August 11 2025 12:57:25 (UTC/GMT +8 hours)

Kelvin to Celsius Conversion

Write a program in C++ to convert temperature in Kelvin to Celsius.

Visual Presentation:

C++ Exercises: Convert temperature in Kelvin to Celsius

Sample Solution:

C++ Code :

#include <iostream> // Including the input-output stream header file

using namespace std; // Using the standard namespace

int main() // Start of the main function
{
    float kel, cel; // Declaring floating-point variables for Kelvin and Celsius temperatures

    cout << "\n\n Convert temperature in Kelvin to Celsius :\n"; // Outputting a message indicating temperature conversion
    cout << "------------------------------------------------\n"; // Outputting a separator line

    cout << " Input the temperature in Kelvin : "; // Prompting the user to input the temperature in Kelvin
    cin >> kel; // Taking input for the temperature in Kelvin from the user

    cel = kel - 273.15; // Converting Kelvin to Celsius using the conversion formula

    cout << " The temperature in Kelvin    : " << kel << endl; // Displaying the input temperature in Kelvin
    cout << " The temperature in Celsius : " << cel << endl; // Displaying the converted temperature in Celsius
    cout << endl; // Outputting a blank line for better readability

    return 0; // Returning 0 to indicate successful program execution
} // End of the main function

Sample Output:

 Convert temperature in Kelvin to Celsius  :                           
------------------------------------------------                       
 Input the temperature in Kelvin : 300                                 
 The temperature in Kelvin    : 300                                    
 The temperature in Celsius : 26.85

Flowchart:

For more Practice: Solve these Related Problems:

Write a C++ program to convert a temperature from Kelvin to Celsius and handle potential invalid inputs.
Write a C++ program that uses a user-defined function to convert Kelvin to Celsius and then prints the result with two decimals.
Write a C++ program to convert Kelvin to Celsius and then compare the result to a predefined temperature threshold.
Write a C++ program that reads multiple Kelvin values, converts them to Celsius, and outputs the conversion in a table format.

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C++ Code Editor:

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