When I convert a lead into an account is there any way it can populate the account information with the default contact persons details?

The majority of my leads/accounts only have one contact person and although it lists their details under "contact person" I have to manually imput all their info again into the main account information text box which is left blank when I convert from a lead.

I have tried to map the fields but it doesnt allow me to map things like the surname etc.