Gross Rent Multiplier (GRM) Calculator

The gross rent multiplier (GRM) is the ratio of a property’s price to its gross annual rent — how many years of rent the price represents. A lower GRM means the property is cheaper relative to the income it produces. Because it uses gross rent and ignores expenses entirely, GRM is a screening metric: fast, blunt, and useful for ranking similar properties before deeper analysis.

Enter the price and rent above. The calculator computes the GRM and the value or rent implied by your target GRM. Everything runs in your browser — your numbers are never uploaded. Because GRM ignores expenses, a low GRM is not automatically a good deal — follow up with the cap rate calculator (adds expenses) and DSCR calculator (adds financing).

What is the gross rent multiplier?

GRM = price ÷ gross annual rent. A $300,000 property renting for $2,500 a month ($30,000 a year) has a GRM of 10. It is the income cousin of price-per-square-foot — simple, but it only looks at the top line, so two properties with the same GRM can have very different NOI once expenses differ.

GRM = purchase price ÷ gross annual rent
gross annual rent = gross monthly rent × 12
lower GRM = cheaper relative to rent

How to use the GRM

Set a target GRM for your market — roughly 4–8 in cash-flow markets, 12–20 or more in high-cost appreciation markets — and use the calculator to flag deals. The “value at target GRM” result tells you what a property is worth at your threshold; the “rent needed” result tells you what rent would justify the asking price. Both are quick framing tools for an offer.

GRM vs. cap rate

GRM uses gross rent; cap rate uses NOI (rent minus expenses). GRM is faster but cruder — it cannot tell a well-run, low-expense building from a money pit. Cap rate is the next step up: same idea (income vs value) but net of operating costs. Investors screen with GRM, then value with cap rate, then test financing with DSCR and cash-on-cash.

What is a good GRM?

There is no universal number — GRM is market-specific. Roughly 4–8 in cash-flow markets (cheaper, higher rents relative to price) and 12–20 or more in high-cost appreciation markets. Set the target to your local norm and compare deals against it, not against an absolute benchmark. The glossary covers GRM alongside the other screening metrics.

Frequently asked questions

What is a good gross rent multiplier?

It depends on the market — roughly 4–8 in cash-flow markets and 12–20 or more in high-cost appreciation markets. Set the calculator’s target to your local norm and screen deals against it rather than against an absolute number.

Is a lower GRM always better?

Not necessarily. A low GRM means cheap relative to rent, which can signal strong cash flow — or high expenses, deferred maintenance, or a rough location. Because GRM ignores expenses, always confirm a low GRM with the cap rate and DSCR before assuming it is a good deal.

Does GRM include expenses or the mortgage?

Neither. GRM uses gross rent only — no operating expenses, no financing. It is the bluntest income metric. Cap rate adds expenses; DSCR and cash-on-cash add the loan.

How is GRM different from cap rate?

GRM = price ÷ gross rent; cap rate = NOI ÷ price. GRM is faster but ignores expenses, so two same-GRM properties can have very different cap rates. Cap rate is the more reliable valuation metric; GRM is the faster screen.

Does this calculator upload my data?

No. All calculations run locally in your browser. The inputs never leave your device — confirm it in your browser’s network tab while editing the fields.