C Program to Convert Celsius to Fahrenheit

Are you learning C programming and looking for simple programs to build your basics?
In this tutorial, you’ll learn how to write a C program to convert Celsius (Centigrade) to Fahrenheit using a standard temperature conversion formula.

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Formula for Temperature Conversion

To compute Fahrenheit (°F) from Celsius (°C), use the following formula:

F = (1.8 × C) + 32

Where:

• F = temperature in Fahrenheit
• C = temperature in Celsius

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C Program to Convert Celsius to Fahrenheit

#include <stdio.h>

int main() {
    float celsius, fahrenheit;

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

    fahrenheit = (1.8 * celsius) + 32;

    printf("Temperature in Fahrenheit: %.2f\n", fahrenheit);

    return 0;
}

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Sample Output

Enter temperature in Celsius: 25
Temperature in Fahrenheit: 77.00

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Why Learn This?

This simple temperature conversion program in C teaches you:

• How to use float for decimal precision
• Taking user input
• Performing basic calculations
• Displaying formatted output

These skills are essential for beginners to build confidence in programming.

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Key Concepts Covered

• Data types (float)
• printf and scanf usage
• Arithmetic expressions in C

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External Reference

Celsius to Fahrenheit Explanation – NIST – A reliable guide to temperature conversions.

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