Converting Leads to Contacts

Converting Leads to Contacts

My telemarketing company introduced me to Zoho CRM but loaded our contact list as "Leads" (optimistic thinking on their part?).  Now I find it difficult to use Zoho because I want leads to represent only contacts that have expressed an interest in our service.  Is there any way to convert all Leads to Contacts?  Perhaps export the entire list, delete from list from Leads and then import the list into Leads?