How it works
How this tool works.
The gross rent multiplier is the fastest back-of-envelope check in real estate: how many years of gross rent equal the purchase price. It won’t tell you whether a deal is good, but it tells you in seconds which listings are even worth a closer look.
Enter the price and the monthly rent, and this calculator estimates the GRM from a year of gross rent. It’s arithmetic on the figures you provide — a first-glance screen to sort properties, deliberately ignoring expenses so it stays quick.
Enter the property price and the monthly rent.
The tool multiplies the monthly rent by 12 to get the annual gross rent the GRM uses.
GRM is the price divided by that annual gross rent — a smaller multiple means you pay less per dollar of rent (the calculator guards against a zero rent).
Treat the result as a first-pass screen, not a valuation — it ignores operating expenses, vacancy, and financing entirely.
Make the result useful
GRM screening context
Price is the acquisition or value figure being screened.
Gross annual rent is scheduled rent before operating expenses.
GRM intentionally excludes expenses, vacancy, and financing so it is only a fast first screen.
Compare like-for-like markets, condition, and property type.
The assumptions that move this result
Price
Purchase or listing price.
Gross rent
Annual scheduled rent before expenses.
Property type
Comparable use and condition context.
Period
A normal annual rent basis.
GRM = price ÷ gross annual rent
Use the output as a documented scenario result, not a guarantee.
Read the number in context
Worked scenario
Scenario: $360,000 ÷ $36,000 rent = 10 GRM.
Edge case
Edge case: low GRM can reflect deferred maintenance or weak collection.
It is not complete underwriting or a valuation conclusion.
Before you act
• Check expenses next.
• Inspect condition and repairs.
• Model NOI and debt separately.
Worked formula
GRM = price ÷ gross annual rent
Is this a forecast?
No. It calculates the assumptions you enter.
Can it replace professional review?
No. Use current records and qualified advice.
What should I save?
Keep the assumptions and source records used for the decision.