A good Airbnb calculator can help you more accurately predict if a deal will cash flow or just quietly lose money every month. These tools estimate what a property would earn as a short-term rental by pulling from real listing data, which lets you sanity-check a purchase before you wire a deposit.
Most roundups stop at listing features, but we decided to go further. We ran a real, operating Airbnb property through every calculator in this review and compared each projection against a full year of actual property manager statements. We also scored every tool across five categories:
- Market Research Data
- Revenue Projections
- Expense & ROI Modeling
- Ease of Use
- Free Tier Availability
Here is how the six tools stack up at a glance. The detailed results, including how far off each projection landed, follow below.
Summary Comparison Table
| Tool | Market Research Data | Revenue Projections | Expense & ROI Modeling | Ease of Use | Free Tier | Accuracy in Our Test |
|---|---|---|---|---|---|---|
| Chalet | US, real comps, AI insights | Property-specific, fully overridable | Full underwriting incl. financing, DSCR, tax shield | Modern, intuitive | Yes | Matched actuals (~$70k) |
| AirDNA Rentalizer | Global, 10M+ listings | Market-level, adjustable on paid plans | Basic, more with paid | Easy, account required | Yes (basic) | Revenue on target, ADR/occupancy mix off |
| Rabbu | US, own STR database | Market averages, no overrides | Limited, basic financing | Very easy, no sign-up | Yes | Understated by 50% ($35k) |
| Airbtics | Global, in-house data | Editable ADR and occupancy | Moderate, light expenses | Somewhat clunky | Yes (basic) | Understated by ($52k) |
| BNB Calc | AirDNA/Airbtics data, Zillow/MLS import | Detailed, partial overrides | Expense/tax modeling, weak on debt | Modern, account needed | Yes (basic) | Overstated by 13% ($79k) |
| Awning | US, AirDNA-based comps | Address-level, no overrides | None (no expenses or cap rate) | Clean, registration needed | Yes | Understated by ($54k) |
How We Tested Each Tool on This List
Our benchmark is an operating Airbnb in Fort Lauderdale, Florida, purchased for roughly $700,000. Over the trailing twelve months it grossed about $70,000 in revenue at a 70% occupancy rate and a $310 average daily rate. After roughly $31,000 in operating expenses, net operating income came to about $39,000, which works out to a 5.6% cap rate. Those figures come from actual property manager statements, not estimates.
We entered the same address and property details into each calculator, adjusted the inputs where the tool allowed it, and recorded the results. A calculator earns high marks when its numbers land close to what the property really earned, and when it gives you enough control to correct its assumptions where they miss. One property is one data point, so treat the accuracy findings as directional rather than definitive. They do reveal a lot about how each tool builds its estimates.
Chalet Airbnb Calculator (launched 2022; free)
Pricing: Free
Chalet’s Airbnb calculator starts the way most tools do, with a comps-based estimate of revenue, ADR, and occupancy. The difference is that nothing in the model is locked. You can override the average daily rate, set your own occupancy target, itemize every expense category (management, cleaning, utilities, insurance, property taxes), and model complete loan terms including interest rate, amortization, and DSCR.
Every adjustment instantly recomputes cash flow, NOI, cap rate, and cash-on-cash return, so the projection describes your specific deal instead of an average of the surrounding zip code. The revenue estimate itself is ADR multiplied by occupancy across the year, built from trailing twelve-month comp data, and the full approach is documented on the methodology page.
The output goes well beyond a headline revenue number. Each analysis is a full underwriting report:
- Monthly revenue and occupancy trends, so you see the seasonal shape of income rather than a flat annual average
- A comp set of real nearby Airbnb listings with their actual revenue, occupancy, and nightly rates
- A line-by-line P&L waterfall from gross revenue through fees, operating costs, and debt service to leveraged cash flow, plus a cash-to-close estimate covering down payment, closing costs, and furnishing
- A break-even purchase price with a price-sensitivity table, so you know exactly what discount makes the deal pencil
- An investor-fit read on the deal, since a property that fails for a cash-flow buyer can still work for a high-equity or 1031 buyer banking on appreciation and tax treatment
- A year-one tax shield estimate covering cost segregation and bonus depreciation
- Projected IRR and equity multiple over a five- or ten-year hold, with editable appreciation and rent-growth assumptions
Analyses can be saved and shared, which makes the tool practical as a true underwriting layer for comparing deals or sending a report to a partner or lender. The platform also bundles a mid-term rental calculator, market and regulation dashboards, and a vetted network of STR agents and lenders. Everything is free, with an account required only after analyzing multiple properties.
In our test, Chalet was the only tool that mirrored the property manager statements across the board. With ADR and occupancy set to actuals, it returned roughly $69,277 in revenue, $31,956 in expenses, $37,321 in NOI, and a 5.3% cap rate. It was also the only calculator to model full debt service correctly, showing the same negative leveraged cash flow the owner actually experiences at 25% down and a 7% rate. At today’s interest rates many STR deals lose money after debt service even when the property is profitable unlevered, and Chalet surfaces that honestly instead of burying it behind optimistic defaults. If you want projections you can defend in front of a lender, this is the strongest option in the group.
AirDNA Rentalizer (free baseline, paid plans $34 to $50/mo)
AirDNA Rentalizer draws on a global database of more than 10 million Airbnb and Vrbo listings. Enter an address and a few property details and it projects annual revenue, occupancy, and ADR, benchmarked against nearby competition and seasonality trends. Basic estimates are free. Comparable property sets, monthly forecasts, amenity-based adjustments, and input overrides sit behind the subscription.
- Customizable revenue projections on paid plans
- Market benchmarking against comparable rentals in the area
- Clear visuals for revenue, ADR, and occupancy
- The deepest seasonality and neighborhood-comparison data in the group
AirDNA nearly matched our property’s total revenue at $69,500, but it got there with the wrong mix. It assumed 79% occupancy at a $242 ADR, against the actual 70% and $310. That distinction matters beyond accuracy bragging rights. Take those assumptions at face value and you would end up setting nightly rates and minimum stays around behavior the property has never actually shown. Its cap rate also initially looked better than reality because it defaulted to a purchase price around $567,000.
Corrected to the real $700,000, the cap rate fell in line at roughly 5.6%. Hosts on Reddit report a similar pattern (one, two), describing optimistic numbers that work as a starting point rather than a forecast. Choose AirDNA when you need broad market context and competitive analysis, and verify the property-level output elsewhere.
Rabbu (free)
Rabbu’s Airbnb Calculator is built for speed above everything else. You skip registration entirely. Type an address, confirm a few details, and revenue, occupancy, and ADR estimates from Rabbu’s own STR database appear in seconds, along with basic financing assumptions.
- Seasonality and trend adjustments at the market level
- Gross revenue breakdown, though expense categories are limited
- No user-adjustable ADR, occupancy, or expense inputs
- US market coverage only, completely free
The speed comes at a cost. Rabbu leans heavily on market averages, and for our above-average property it projected $35,157 in revenue at 40% occupancy and a $172 ADR. That is roughly half the real revenue, and NOI came in at $20,029 against the actual $39,000. Because the revenue baseline skews low and nothing can be overridden, the financing view exaggerated the downside too, showing a -15% cash-on-cash return. Rabbu’s real job is ruling markets in or out during early research. A property that still pencils despite its low-ball defaults probably deserves a closer look in a more granular tool.
