The Drake Equation

N = StarRate x fplanets x fhabitable x flife x fintelligence x fcommunicate x Lifetime

Equation Explained

N = Number of Civilizations that can communicate with us

StarRate = Star Formation rate in our Galaxy

fplanets = Fraction of stars that have planets

fhabitable = Fraction of Planets per star that can support life.

flife = Fraction of Planets that develop Life

fintelligence = Fraction of planets with life that develop intelligent life

fcommunicate = Fraction of intelligent life that is willing and able to communicate

Lifetime = Expected lifetime of civilizations