1031 exchange capital gain exclusion

Dear 1031x: Why does your site's 'calculating capital gains' calculator not  include the $500K exclusion?  Where does it apply in calculating capital  gain from a home sale?

Dear Carol:  Thank you for contacting us.  The reason that our calculator does not include the $500K exclusion is because that exclusion only applies to the sale of principal residences.  Our website deals primarily with the 1031 exchange of investment property and not with the sale of principal residences.  We designed the capital gains calculator to help customers estimate their tax if they decide NOT to do a 1031 exchange.  Sincerely,

Steve Hickox
Attorney / President