Drake Equation Calculator

R - Rate of formation of suitable stars in our galaxy (number per year) R =
Fp - Fraction (percentage) of those stars with planets Fp = %
Ne -Number of "earths" per planetary system Ne =
Fl - Fraction (percentage) of those planets where life develops Fl = %
Fi - Fraction (percentage) of sites with intelligent life Fi = %
Fc - Fraction (percentage) of planets where technology develops Fc = %
L - "Lifetime" of communicating civilizations (years) L =
R * Fp * Ne * Fl * Fi * Fc * L = N  
N - Number of communicative civilizations N =

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