The New York Occupied Conversion Unit Combination Spreadsheet is an online tool used for calculating the total number of housing units that are suitable for conversion from non-residential to residential use. It is used to assess the maximum number of residential units that can be developed in an area based on the zoning requirements for residential and commercial occupancy. This spreadsheet helps developers, architects, and planners to identify potential conversion opportunities in a given location. The spreadsheet consists of two sections, the first of which is the "Conversion Matrix," which outlines the zoning requirements for each type of occupancy and the second is the "Unit Combination Calculator" which calculates the total number of units that can be developed based on the zoning requirements. The two types of New York Occupied Conversion Unit Combination Spreadsheets are the "Maximum Conversion" and the "Modified Conversion" versions. The "Maximum Conversion" spreadsheet allows developers to identify the maximum number of units that can be converted in a given area, while the "Modified Conversion" spreadsheet allows developers to adjust the zoning requirements to increase the total number of units that can be developed.