Free, no account
Free real estate investing calculators
Quick rental and flip math. Every calculator shows its formula, updates as you type and runs entirely in your browser.
- Formula shown on every page
- Numbers stay in your browser
- No account, no tracking scripts
Calculators
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Buy and hold
Rental cash flow
NOI, monthly cash flow, cap rate, cash-on-cash return and DSCR for a buy-and-hold rental.
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BRRRR
BRRRR
Cash in, refinance cash-out, cash left in the deal and cash flow on the new loan.
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Flip and wholesale
70% rule / MAO
Maximum allowable offer for a flip or wholesale deal, your spread and the end buyer's profit check.
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Buy and hold
DSCR
Debt service coverage two ways, and the largest loan that meets your lender's minimum.
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Buy and hold
Cap rate & 1% rule
Fast screens: cap rate, gross rent multiplier and the 1% rule.
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Buy and hold
Mortgage payment
Principal and interest plus tax, insurance and HOA for the full monthly payment.
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Buy and hold
House hack
Live in one unit and rent the rest: see what your housing really costs each month.
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Flip and wholesale
Fix and flip
Purchase, rehab, holding and selling costs, then profit and return on a flip.
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Short-term rental
Short-term rental
Nightly rate, occupancy and costs for an Airbnb-style rental: revenue, cash flow and return.
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Build and rehab
Construction draw
Plan loan draws against construction stages and see interest as the balance builds.
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California landlord
California rent cap checker
AB 1482: find the maximum rent increase (5% plus CPI, up to 10%) and check the exemptions.
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California landlord
California security deposit limit
The maximum deposit under Civil Code 1950.5 and AB 12, before and after July 1, 2024.
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Game
Grade the Deal
Guess the cap rate on ten made-up rental deals and earn a letter grade you can share.
Guides
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Guide
What is a good cap rate?
The cap rate formula, a worked example, and why there is no single good number.
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Guide
The BRRRR method explained
Buy, rehab, rent, refinance, repeat, with a worked example of cash left in the deal.
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Guide
The 70% rule and max allowable offer
The max allowable offer formula for flips and wholesale deals, and where it breaks down.
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Guide
What is DSCR? Debt service coverage explained
The debt service coverage ratio, how lenders use it, and the loan a rental can support.
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Guide
How to calculate cash flow on a rental property
Rent to NOI to cash flow, step by step, with a worked example.
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Guide
The 1% rule in real estate
A quick rent-to-price screen, a worked example and its limits.
The method is on the page
Each calculator lists its formulas and a worked example from the loaded numbers, so you can check the math yourself.
Same math as the spreadsheets
The formulas follow the Cap Rate Studio spreadsheets. The free version is the quick check; the spreadsheet is the full model.
Estimates, not advice
Results come only from what you type. Use them to compare deals and ask better questions, then verify with your own numbers.
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