freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/convert-celsius-to-fahrenheit.md

---
id: 56533eb9ac21ba0edf2244b3
title: Convert Celsius to Fahrenheit
challengeType: 1
forumTopicId: 16806
---

## Description
<section id='description'>
The algorithm to convert from Celsius to Fahrenheit is the temperature in Celsius times <code>9/5</code>, plus <code>32</code>.
You are given a variable <code>celsius</code> representing a temperature in Celsius. Use the variable <code>fahrenheit</code> already defined and assign it the Fahrenheit temperature equivalent to the given Celsius temperature. Use the algorithm mentioned above to help convert the Celsius temperature to Fahrenheit.
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>convertToF(0)</code> should return a number
    testString: assert(typeof convertToF(0) === 'number');
  - text: <code>convertToF(-30)</code> should return a value of <code>-22</code>
    testString: assert(convertToF(-30) === -22);
  - text: <code>convertToF(-10)</code> should return a value of <code>14</code>
    testString: assert(convertToF(-10) === 14);
  - text: <code>convertToF(0)</code> should return a value of <code>32</code>
    testString: assert(convertToF(0) === 32);
  - text: <code>convertToF(20)</code> should return a value of <code>68</code>
    testString: assert(convertToF(20) === 68);
  - text: <code>convertToF(30)</code> should return a value of <code>86</code>
    testString: assert(convertToF(30) === 86);

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function convertToF(celsius) {
  let fahrenheit;
  return fahrenheit;
}

convertToF(30);
```

</div>



</section>

## Solution
<section id='solution'>


```js
function convertToF(celsius) {
  let fahrenheit = celsius * 9/5 + 32;

  return fahrenheit;
}

convertToF(30);

```

</section>