Example: Number of units: 12 units · Average monthly rent per unit: $1,350 · Vacancy: 6% · Expense ratio: 45 % of EGI → Cap rate: 5.74%.
Annual NOI: $100,505
Price per unit: $145,833
Gross rent multiplier: 9
Frequently asked questions
How do I calculate apartment investment? Enter your numbers above and the result updates instantly. For example: Number of units: 12 units · Average monthly rent per unit: $1,350 · Vacancy: 6% · Expense ratio: 45 % of EGI → Cap rate: 5.74%.
Is this Apartment Investment Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for apartment investment. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.