About the Vacancy Rate Calculator
Vacancy rate of a rental property or portfolio from vacant unit-days (or units) and total available.
Also known as: occupancy rate, vacancy percentage, physical vacancy.
How to use this calculator
- Enter vacant units (or days vacant), total units (or available days).
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Open “Step-by-step” to see how the answer was worked out.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Vacancy rate = Vacant units (or days vacant) ÷ Total units (or available days) × 100
Worked example
Using the values pre-filled in the calculator above:
- Vacant units (or days vacant) = 18
- Total units (or available days) = 365
the calculator returns:
- Vacancy rate: 4.93%
- Occupancy rate: 95.07%
Working
Vacancy rate = 18 ÷ 365 × 100 = 4.9315%