Understanding Vacancy Rate
How we calculate. Vacancy % = vacant ÷ total units × 100. See our methodology and accuracy policy .
Real-world scenario: A typical Vacancy Rate case uses vacant units 12 and total units 150. Enter the same figures below to reproduce the worked path.
What is Vacancy Rate?
Leasing and underwriting KPI. Some analyses use vacant SF ÷ total SF instead of unit counts.
- Same unit definition in both inputs
- Economic vacancy may include unpaid occupied units—label if used
- Segment by building
The Formula
Worked Example
Common Use Cases
- Asset management: leasing health
- Underwriting: income haircuts
- Market reports: submarket trends
Pro Tips
- Pair with occupancy (usually complements)
- Track days vacant separately
- Watch concessions as soft vacancy
| Scenario | When to use |
|---|---|
| Percent of a number | Finding a part of a whole (tax, tip, score) |
| Percent change | Comparing old vs new values |
Limitations: Vacancy Rate results are educational real-estate planning aids—not appraisals, loan offers, or investment advice. Confirm figures with qualified professionals and your lender.
Common mistakes
- Swapping part and whole: The denominator must be the full total, not a subset.
- Rounding too early: Carry extra decimal places through multi-step work before rounding the final percent.
- Mixing percent and decimal forms: Enter rates in the format the calculator labels expect.
The worked example for vacancy rate was verified with the calculator form on this page—enter the same values to confirm the result.
When to use this calculator
- Use this page when your wording matches vacancy rate and the form labels on screen.
- Use percent of a number for “what is X% of Y?” problems.
- Use number is what percent when you know part and whole and need the percent.
Still unsure about vacancy rate? Start with the quick answer above, then open the linked calculator that matches your wording.
❓ Frequently Asked Questions
How do I use this vacancy rate calculator?
For vacancy rate, enter the values labeled on the form, then press Calculate. Compare the result to the worked example on this page.
What formula does this page use?
See the quick answer and formula box above for vacancy rate—the same percentage calculator expression is applied to your inputs.
What if my result looks wrong?
When checking vacancy rate, re-check part vs whole (or rate vs base), rounding, and whether percents were entered as 25 rather than 0.25 when the form expects percents.
Authoritative References
For real estate investing concepts, consult:
- National Association of Realtors — market and practice context
- Investopedia — Cap rate — capitalization rate basics
- CFPB — homebuying and closing education