afterConvert.vfp

<apex:page standardController="Lead">
        <apex:pageBlock title="Lead Conversion Status!" id="LeadBlock">
        <apex:pageBlockSection title="Lead Details">
            <apex:outputField value="{!lead.ConvertedContactId}"/>
            <apex:outputField value="{!lead.Status}"/>
            <apex:outputField value="{!lead.ConvertedAccountId}"/>
            <apex:outputField value="{!lead.Id}"/>
            <apex:outputField value="{!lead.ConvertedOpportunityId}"/>            
        </apex:pageBlockSection>    
    </apex:pageBlock>
</apex:page>