Drake Equation Calculator

Enter Number of stars formed per year in Galaxy R_star:

Enter probability of planetary formation f_p:

Enter number of Earth-like planets per solar system N_e:

Enter probability of primitive life evolving f_l:

Enter probability of intelligent life developing from primitive life f_i:

Enter probability of intelligent life developing technology f_t:

Enter life of the technological civilization L_i:

Click this button to calculate the number of civilizations in Galaxy.

Number of civilizations is: