D10 Chart Calculation & How It is Analysed - GaneshaSpeaks The simplest way to calculate a D10 map is to divide any sign into ten equal parts. Each character is made up of 30 degrees. So, if you split it into ten parts, each piece would be three degrees. As a result, this section will be known as Dashami. But the first Dashamsa will be from 0 to 3 degrees, the second from 3 to 6 degrees, and so on.