Unit conversion - mm to pixel - pixel to MM

1. Mm to pixel

Inches = Mm / 25.4;
sizes = Inches * DPI ;

// Mm to pixel 
static int MM2Px(double val, double dpi){
    
	val = val / 25.4;
	int px = val*dpi;
	return px;
}

2. Pixels to millimeters

sizes / DPI = Inches ;
Inches * 25.4 = Mm ;

// Mm to pixel 
static double Px2MM(double val, double dpi){
    
	val = val / dpi;
	double mm = val*25.4;
	return mm;
}