C program to convert Celsius to Fahrenheit

In this article, we will show you, How to write a C program to convert Celsius to Fahrenheit with an example. The formula behind the temperature conversion is: Fahrenheit = (9/5) * Celsius) + 32

C program to convert Celsius to Fahrenheit

This C program let the user enter the temperature value in Celsius, and we are going to convert the user specified temperature in Celsius to Fahrenheit.

//C program to convert Celsius to Fahrenheit
#include <stdio.h>
 
int main()
{
    float celsius, fahrenheit;
 
    printf("Please Enter temperature in Celsius: \n");
    scanf("%f", &celsius);
 
    // Convert the temperature from celsius to fahrenheit 
    fahrenheit = ((celsius * 9)/5) + 32;
    // fahrenheit = ((9/5) * celsius) + 32;
    // fahrenheit = ((1.8 * celsius) + 32;
 
    printf("\n %.2f Celsius = %.2f Fahrenheit", celsius, fahrenheit);
 
    return 0;
}

OUTPUT

ANALYSIS
Following statements will ask the user to enter the temperature value in Celsius, and the scanf statement will assign the user entered values to already declare variable Celsius.

printf("Please Enter temperature in Celsius: \n");
scanf("%f", &celsius);

We can use any of the below specified formulas to convert the temperature in Celsius to Fahrenheit

fahrenheit = ((celsius * 9)/5) + 32
fahrenheit = ((9/5) * celsius) + 32 => ((1.8 * celsius) + 32;

Last printf statement will print the output

printf("\n %.2f Celsius = %.2f Fahrenheit", celsius, fahrenheit);

Let me show you the Fahrenheit value of Zero Celsius

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