Temperature conversions are performed by using a formula, which differs depending on the two temperature scales you are converting between. For example, to convert 50 degrees Celsius (centigrade) to Fahrenheit, we plug our numbers into the formula as shown below: F = C * 9/5 + 32 F = 50 * 9/5 + 32 F = 90 + 32 F = 122 50 degrees Celsius is equal …

TemparatureConvert.php

<?php
class TemparatureConvert
{
    private function kelToCel($num)
    {
        return round($num - 273.15, 2);
    }
    
    private function celToFar($num)
    {
        return round(($num * 9/5 + 32),2);
    }
    
    private function celToKel($num)
    {
        return round($num + 273.15, 2);
    }
    
    private function farToKel($num)
    {
        return round((($num + 459.67) * 5/9),2);
    }
    
    private function farToCel($num)
    {
        return round(($num - 32) * 5/9, 2);
    }
    
    private function farToKel($num)
    {
        return round((($num + 459.67) * 5/9),2);
    }
}