C++ Exercises: Convert temperature in Celsius to Kelvin

Last update on August 11 2025 12:58:27 (UTC/GMT +8 hours)

Celsius to Kelvin Conversion

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

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

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

    kel = cel + 273.15; // Converting Celsius to Kelvin by adding the Celsius temperature to 273.15 (absolute zero in Celsius)

    cout << " The temperature in Celsius : " << cel << endl; // Displaying the input temperature in Celsius
    cout << " The temperature in Kelvin : " << kel << endl; // Displaying the converted temperature in Kelvin
    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 Celsius to Kelvin  :                           
---------------------------------------------------                    
 Input the temperature in Celsius : 26.85                              
 The temperature in Celsius : 26.85                                    
 The temperature in Kelvin : 300

Flowchart:

For more Practice: Solve these Related Problems:

Write a C++ program to convert Celsius to Kelvin ensuring that the input is above absolute zero.
Write a C++ program that uses a user-defined function to convert Celsius to Kelvin and prints the output with fixed notation.
Write a C++ program to convert a series of Celsius temperatures to Kelvin and display the conversions in a formatted list.
Write a C++ program that reads Celsius values, converts them to Kelvin, and then checks if the resulting temperature qualifies as room temperature.

Go to:

PREV : Fahrenheit to Kelvin Conversion.
NEXT : Scalene Triangle Area Calculation.

C++ Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.