Free materials To help you with constructing and calculating Namkhas 1. Namkha calculation blanks for females and males Download A4 Download us letter What's the calculation blank for? To calculate Namkhas for Tibetan hour, day, month and year. To learn the calculation methods, you’ll need these two books: C.N.Norbu – Namkha: Harmonizing the Energy of the Elements M. Tsering – “Jung-We Kyil-Khor: Mandala of Astrological elements”