Mass Conversion of Sales Orders and Quotes
Mass conversion of Quotes to Sales Order/Invoice and mass conversion of Sales order to Invoice follows the same process as that of leads conversion.

Simply select all the records you wish to convert from the required module’s List View and apply the Mass Convert option to the selected records.

Automate Conversion of records using workflow rule

You can also automate the conversion of leads, quotes and sales orders.

Let us say you are required to convert a lead to a contact every time the Lead Status field has been updated to "Contacted". This process can be automated via a workflow rule.

All you have to do is set Field Update as the rule trigger and mention the Rule Criteria as "Lead Status is Contacted". Then select Convert as the Instant Action and select Contact and Account. Now whenever the Lead Status of a lead is updated to "Contacted", the lead will automatically be converted to an account and contact.

The same process is followed for automating the conversion of a quote/sales order.

Note that the Convert action in a Workflow rule is available only when the following conditions are met.

1. The Rule Trigger actions are Edit or Field Update.
2. A Rule Criteria is specified in the workflow rule.
3. If the 'Execute workflow only when the criteria is met for the first time' option is selected.