How TO - Temperature Converter
Learn how to create a temperature converter with HTML and JavaScript.
Temperature Converter
Type a value in any of the fields to convert between temperature measurements:
Create a Temperature Converter
Create an input element that can convert a value from one temperature measurement to another.
Step 1) Add HTML:
Example - Fahrenheit to Celcius
<p>
<label>Fahrenheit</label>
<input id="inputFahrenheit" type="number" placeholder="Fahrenheit"
oninput="temperatureConverter(this.value)"
onchange="temperatureConverter(this.value)">
</p>
<p>Celsius: <span id="outputCelsius"></span></p>
Step 2) Add JavaScript:
Example - Fahrenheit to Celcius
/* When the input field receives input, convert the value from fahrenheit to celsius */
function temperatureConverter(valNum) {
valNum = parseFloat(valNum);
document.getElementById("outputCelsius").innerHTML = (valNum-32) / 1.8;
}
Try it Yourself »
Convert from Fahrenheit to other Measurements
The table below shows how to convert from Fahrenheit to other temperature measurements:
| Description | Formula | Example |
|---|---|---|
| Convert from Fahrenheit to Celsius | ℃=(℉-32)/1.8 | Try it |
| Convert from Fahrenheit to Kelvin | K=((℉-32)/1.8)+273.15 | Try it |
Convert from Celsius to other Measurements
The table below shows how to convert from Celsius to other temperature measurements:
| Description | Formula | Example |
|---|---|---|
| Convert from Celsius to Fahrenheit | ℉=(℃*1.8)+32 | Try it |
| Convert from Celsius to Kelvin | K=℃+273.15 | Try it |
Convert from Kelvin to other Measurements
The table below shows how to convert from Kelvin to other temperature measurements:
| Description | Formula | Example |
|---|---|---|
| Convert from Kelvin to Fahrenheit | ℉=((K-273.15)*1.8)+32 | Try it |
| Convert from Kelvin to Celsius | ℃=K-273.15 | Try it |
