There are two main methods for calculating dwelling counts - massing and per feature.

When assigning a unit mix to a mass (IE the Residential Usage), the calculation for each unit type is (grossBuildingArea * sellEfficiency * mix) / dwellingSize. The result is rounded to the nearest whole number.

You establish unit size and mix in the Dwellings property in the Usage.

When drawing individual units, like apartments (with flow), townhomes, or single family, you can assign the Dwelling Count and Dwelling Count Per Level properties to make each geometry count as a single dwelling.

The calculation depends on the dwelling count per level toggle.

The count of all dwellings for the selected feature.

All dwellings of the selected type for the current feature, summed.

IE - Dwelling 1 Bedroom count returns the sum of all 1 bedroom units in a feature

dwellingPrice * dwellingCount, summed for all dwellings in the feature

dwellingPrice

IE - Dwelling 1 Bedroom Price returns the price input for 1 Bedroom units

dwellingCars * dwellingCount , summed for all dwellings in the feature

dwellingCars

IE - Dwelling 1 Bedroom Cars returns the required cars input for 1 Bedroom units

dwellingResidents * dwellingCount, summed for all dwellings in the feature

dwellingResidents

IE - Dwelling 1 Bedroom Residents returns the residents input for 1 Bedroom units