ECTS CONVERSION

Hi, I'm Bcom graduate from Mumbai University and I'm currently planning my masters in Germany. I know most public universities ask for 180-210 ECTS. Can anyone explain to me how you can find out how many ects you have from your degree? Mine was a 3 year degree so does that automatically convert into 60 points each year, totalling 180 or is there a different way of calculating this?