Rental Property Calculator: Primary Residence To Rental

[Mike Roterdam]

Dear All

How does one use the Bigger Pockets Rental Property Calculator when converting a primary residence to rental? From what I can gather it assumes the purchase of a rental property from day #1. How should the fields be filled out when the property has been lived in for a period of time as a primary residence, and then converted to a rental property?

If this calculator is not setup to handle the conversion situation, I would appreciate references to other calculators/spreadsheets that can.

Thank you