public class ConversionTool {


    public static void main(String[] args){
    
    }

    public static float CentimetersToInches(float centimeters){
        return centimeters < 0 ? 0 : centimeters * 0.393701f;
    }

    public static float InchesToCentimeters(float inches){ 
        return inches < 0 ? 0 : inches * 2.54f;
    }

    public static float FeetToMeters(float feet){
        return feet < 0 ? 0 : feet * 0.3048f;
    }

    public static float MetersToFeet(float meters){
        return meters < 0 ? 0 : meters * 3.28084f;
    }

    public static float CelsiusToFahrenheit(float celsius){
        return (celsius * 1.8f) + 32;
    }

    public static float FahrenheitToCelsius(float fahrenheit){
        return (fahrenheit - 32) / 1.8f;
    }

    public static float MphToKph(float mph){
        return mph < 0 ? 0 : mph * 1.60934f;
    }

    public static float KphToMph(float kph){
        return kph < 0 ? 0 : kph * 0.62137f;
    }
}