Vacancy Rate Calculator
Last updated: October 15, 2026
Estimate physical vacancy rate, occupied rate, potential rent and lost rent from vacant unit-days.
Estimated physical vacancy rate
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- Estimated occupied rate: —
- Potential gross rent for period: —
- Estimated rent lost to vacancy: —
- Average vacant units during period: —
On this page
Quick summary: Estimate physical vacancy rate, occupied rate, potential rent and lost rent from vacant unit-days.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Estimate physical vacancy rate, occupied rate, potential rent and lost rent from vacant unit-days.
How to use it
Enter Total rentable units; Days in analysis period; Total vacant unit-days; Average monthly rent per unit ($). Select Calculate to update the results.
How the calculation works
Vacant unit-days are divided by total available unit-days. Potential rent is scaled to the analysis period and multiplied by vacancy for the lost-rent estimate.
Worked example: starting scenario
| Total rentable units | 12 |
|---|---|
| Days in analysis period | 365 |
| Total vacant unit-days | 420 |
| Average monthly rent per unit ($) | 1650 |
| Estimated physical vacancy rate | 9.59% |
|---|---|
| Estimated occupied rate | 90.41% |
| Potential gross rent for period | $237,600.00 |
| Estimated rent lost to vacancy | $22,783.56 |
| Average vacant units during period | 1.15 units |
Important limitations
Economic vacancy can also include concessions, nonpayment, offline units and below-market rent. This calculator focuses on physical vacancy.