JavaScript Program to Convert Celsius to Fahrenheit

Fahrenheit and centigrade are the two most used temperature scales and we often need to convert Celsius to Fahrenheit. In this article, we are going to learn how to Convert Celsius to Fahrenheit.

Fahrenheit

Fahrenheit is a scale of temperature. Its unit is the degree Fahrenheit (°F). This unit is named after physicist Daniel Gabriel Fahrenheit who first proposed this temperature scale in 1724. On the Fahrenheit scale, the water freezes at 32°F and boils at 212°F under normal conditions. Fahrenheit is also the U.S. customary measurement unit of temperature.

Celsius

Celsius is also a scale of temperature. Its unit is the degree Celsius (°C). This unit was named after astronomer Anders Celsius in 1948. On the Celsius scale, the water freezes at 0°C and boils at 100°C under normal conditions. Almost the whole world uses Celsius for temperature measurement aside from the U.S. Celsius is sometimes referred to as Centigrade.

The formula for converting the Celsius Scale to the Fahrenheit Scale is: 

 T(°F) = T(°C) × 9/5 + 32

Example:

Convert 10 degrees Celsius to degrees Fahrenheit:
T(°F) = 10°C × 9/5 + 32 = 50°F

Several methods can be used to Convert Celsius to Fahrenheit by using the above-mentioned formula, which are listed below:

Approach 1: Using the formula with a custom function

In this approach, we are using a javascript custom function and applying the formula: Fahrenheit = (Celsius * 9/5) + 32. For a given temperature of 20°C.

Syntax:

function celcToFahr( n ) {
    return ((n * 9.0 / 5.0) + 32.0);
}

Example: In this example, we are using the above-mentioned approach.

Javascript

// Javascript Program to convert Temperature
// from Celsius to Fahrenheit

// function to convert Celsius
// to Fahrenheit
function celcToFahr( n ) {
    return ((n * 9.0 / 5.0) + 32.0);
}

// Driver code
const n = 20;

console.log(celcToFahr( n ));

Output

68

Approach 2: Using the arrow function and template literals

In this approach, we are using the arrow function and template literals to convert Celsius to Fahrenheit. The arrow function applies the formula: Fahrenheit = (Celsius * 9/5) + 32. For a given temperature of 20°C.

Syntax:

const celcToFahr = (n) => `${n} Celsius is equal to ${(n * 9 / 5) + 32} Fahrenheit.`

Example: In this example, we are using the arrow function with the formula: Fahrenheit = (Celsius * 9/5) + 32.

Javascript

const celcToFahr = (n) =>
    `${n} Celsius is equal to ${(n * 9 / 5) + 32} Fahrenheit.`;

const n = 20;
console.log(celcToFahr(n));

Output

20 Celsius is equal to 68 Fahrenheit.