Interactive Lab
The CRE Calculator Suite
67 calculators and diagnostics. Every tool is also embedded directly in the lessons where it’s relevant — this hub is for when you want to work with a calculator on its own.
Core Underwriting Ratios
Cap Rate Simulator
Manipulate NOI, price, and market cap rate to see the resulting cap rate, implied value, and a full sensitivity table across a range of cap rates.
NOI Builder
Walk from Gross Potential Rent through vacancy/credit loss, other income, and operating expenses to Net Operating Income, watching every intermediate number update live.
Loan Sizer (DSCR / LTV / Debt Yield)
Generalizes the classic Deal Checker: enter a property's NOI, value, rate, and amortization plus a lender's minimums, and see the maximum loan size, each individual constraint, and which one binds.
LTV Calculator
Loan as a share of value — and the equity that has to fill the gap.
LTC Calculator
Loan-to-cost — the leverage test that governs construction and heavy value-add.
DSCR Calculator
Does the property's income cover the loan payment, and by how much?
Debt Yield Calculator
The lender's return if they foreclosed tomorrow and owned the building free and clear.
Loan Constant Calculator
Annual debt service per dollar borrowed — the bridge between a coverage test and an actual loan amount.
Break-Even Occupancy Calculator
How empty the building can get before it stops paying its own bills.
Operating Expense Ratio Calculator
What share of collected income the building eats before the owner sees a dollar.
Cash-on-Cash Return Calculator
The first-year answer to what your money actually earns.
IRR and Equity Multiple Calculator
The whole hold in one place: what you put in, what it pays each year, what it sells for, and the two numbers investors actually ask about.
Loan Mechanics & Amortization
Rate & Pricing Mechanics
Index + Spread Rate Calculator
Almost no commercial loan is quoted as a single number — it's an index plus a spread.
Points and Effective Rate Calculator
What the points actually cost you, spread over how long you expect to hold the loan.
Blended Rate Across the Capital Stack
The weighted-average cost of capital once senior debt, mezzanine, and preferred equity are all in the stack.
Interest Rate Cap Cost — Indicative
A rough, illustrative sense of what a rate cap costs — not a real dealer quote.
Monthly Escrow and Total Payment
Taxes, insurance, and reserves, folded into one monthly number alongside principal and interest.
Returns & Scenario Analysis
Cap Rate Build-Up Calculator
Derive a cap rate from its actual components -- a risk-free rate, a risk premium, and an illiquidity premium, net of expected growth -- instead of just observing NOI divided by a comp's price.
Exit Cap Rate vs. Levered IRR Sensitivity
See how far a deal's levered IRR moves across a realistic range of exit cap rates -- the single most common way a good-looking base case turns into a disappointing outcome.
Monte Carlo Return Simulator
Run thousands of randomized trials of the same deal, varying NOI growth and exit cap rate, to see a full distribution of IRR outcomes instead of one point estimate.
Market Cycle Phase Diagnostic
Pick what you're seeing in vacancy, rent growth, and new construction, and see which of the four real estate cycle phases it points to -- and whether the signals actually agree.
Purchase vs. Lease Calculator
For an owner-occupant deciding whether to buy or keep renting -- before any financing structure is even relevant.
Rate Derivatives
Insurance
Coinsurance Penalty / Insurance-to-Value Calculator
If the limit carried falls short of the coinsurance requirement, a partial-loss claim gets paid at a penalty -- even though the loss is far less than the policy limit.
Business Interruption / Loss-of-Rents Coverage Calculator
The policy limit needed to bridge lost income and continuing expenses across a full reconstruction and re-lease-up period.
Sustainability
Market Feasibility
Prepayment
Yield Maintenance Calculator
The agency and life-company prepayment penalty: pay the lender the yield they would have earned if you'd never prepaid.
Defeasance Cost Calculator
The CMBS alternative to prepaying: buy a bond portfolio that replaces the loan's remaining payments.
Step-Down Prepayment Calculator
The simplest penalty structure: a declining percentage of the balance, published in advance.
Prepayment Structure Comparison
The same loan, three structures, one payoff date.
Refinance & Risk
Refinance Proceeds Calculator
What comes out — or what you have to bring — when a maturing loan is replaced.
Refinance Stress Test
Can the loan actually be replaced at maturity, once you stress the rate and the value?
Loan Assumption Value Calculator
When rates have risen, an existing low-rate loan is worth real money to a buyer.
Partial Release Price
What it costs to release one parcel from a blanket loan.
Value Decline Test
How far value can fall before an LTV covenant breaks.
Rate Shock Calculator
Move the rate and watch two things break: today's coverage, and the loan the same property can carry.
Leasing & Property Metrics
Net Effective Rent Calculator
What a lease is really worth after free rent, TI, and commissions — not what the sign says.
Gross vs. Triple-Net Comparison
Net versus gross, on the same footing.
Gross Rent Multiplier Calculator
Price as a multiple of gross rent — the fastest screen in real estate, and the least trustworthy.
Economic Vacancy Calculator
The gap between the vacancy on the rent roll and the vacancy in the bank account.
Rent Per Square Foot Converter
Convert a lump rent figure into $/SF/yr and $/SF/mo to compare against a comp set.
Percentage Rent and Occupancy Cost Calculator
What a retail tenant owes above base rent once sales clear the breakpoint.
Hotel RevPAR and Value Calculator
Occupancy times rate gives RevPAR — from there to rooms revenue, NOI, and value per key.
TI and Leasing Commission Reserve Calculator
What it really costs, every year, to keep an office or retail building leased.
Replacement Reserve Calculator
The annual capital set-aside a lender deducts before NOI.
Price Per Unit and Per Square Foot
Two of the fastest deal screens there are — run both at once.
Load Factor Calculator
Normalizes a quoted per-RSF rent to what it actually costs per square foot you can use.
Expense Stop / Base-Year Gross-Up Calculator
Scales a base year's actual expenses up to full occupancy before comparing them to a later year -- skip this and you can overstate a tenant's reimbursement by thousands of dollars a year.
Development & Construction
Development Budget Builder
Land, hard costs, soft costs, contingency, and the developer fee, layered into one total.
Interest Reserve Calculator
A construction loan funds in draws — sizing the interest reserve wrong is a common way a project runs out of money.
Absorption and Lease-Up Calculator
How long a new building takes to fill, and how much cash it burns getting there.
Yield on Cost and Development Spread Calculator
The one number that decides whether a development is worth doing.
SBA 504 Structure Calculator
The owner-occupied structure that lets a business buy its building with 10% down.
Capital Stack
Equity Waterfall Simulator
Build an LP/GP capital stack with a preferred return and a two-tier IRR-hurdle promote, and see exactly how profit splits between the sponsor and the equity investors at exit.
Mezzanine Loan Sizing Calculator
How much mezzanine debt fits above the senior loan.
Preferred Equity Accrual Calculator
What a preferred equity position is owed at redemption once it has been accruing for years.
Tax Strategy
1031 Exchange Boot Calculator
How much of your gain a like-kind exchange defers — and how much becomes taxable boot.
Cost Segregation Calculator
How much depreciation a cost segregation study pulls into year one.
Depreciation Recapture Calculator
What you actually keep after selling -- splitting the gain into recaptured depreciation and remaining capital gain.
LIHTC Equity / Credit Pricing Calculator
How much equity a 4% or 9% Low-Income Housing Tax Credit allocation actually raises for the capital stack.
Accounting & Reporting
Broker Economics
Document Diagnostics
Rent Roll Red-Flag Diagnostic
A realistic 8-unit rent roll with three planted problems — a vacant unit, an inflated related-party lease, and a rollover cliff. Click the rows you think are issues, then see what you caught and missed.
T12 Normalization Exercise
A realistic T12 with a one-time insurance payout, an above-market management fee, a capital repair miscoded as an operating expense, and a personal expense running through the books. Flag what you'd adjust, then compare your normalized NOI to the true figure.