The Universal Calculation Engine
The Universal Calculation Engine
Real Estate Calculators

Use these calculators for deal screening, analysis, and property management. Deal Screening & Offers covers deal finder, 70% rule, fix & flip, wholesaling, and investor mortgage. Analyze & Execute includes rental property, rehab estimator, BRRRR, and Airbnb. Compare & Exit helps with deal comparison and sell vs keep. Property Management Suite covers rent pricing, lease profitability, vacancy risk, expense benchmark, and portfolio analyzer. Financing includes loans and home affordability. Quick Metrics & Calculators includes rent vs buy, cap rate, cash flow, cash-on-cash, DSCR, house flip, down payment, closing cost, and price per sq ft. Search or pick a category below to start.

Tools by category

Deal Finder Mode
Enter price, rent, and rehab → Calciverse tells you: BUY, NEGOTIATE LOWER, or PASS
70% Rule
ARV, repairs, profit and costs → maximum allowable, safe, aggressive, and danger offers
Fix & Flip Calculator
Purchase, rehab, ARV, costs, and loan terms → net profit, ROI, offer guidance, and risk
Wholesaling Calculator
ARV, repairs, assignment fee, and buyer profit target → max offer to seller and deal quality
Mortgage Calculator
Investor‑focused mortgage with extra payments and refinance simulation
Rehab Estimator
Cost per sq ft + detailed line items → total rehab cost and warnings
BRRRR Calculator
Buy, Rehab, Rent, Refinance, Repeat → cash left in, cash out, and infinite return detection
Rental Property Calculator
Full analysis: cash flow, CoC, cap rate, IRR, wealth creation, break-even rent, and deal score.
Purchase
Operating Expenses (annual)
Income
Hold & Sell
Wealth Growth
Cash Flow by Year
Expense Breakdown
Airbnb Calculator
Nightly rate, occupancy, and costs → cash flow, CoC, cap rate, and minimum profitable nightly rate
Cap Rate
Capitalization rate: NOI ÷ purchase price
Cash Flow
Monthly income minus expenses and debt service
Cash-on-Cash Return
Annual cash flow ÷ total cash invested
DSCR
Debt service coverage ratio: NOI ÷ annual debt service
Sell vs Keep
Compare wealth if you sell now vs keep renting, with appreciation and loan paydown
Deal Comparison & Dashboards
Compare saved rental and flip scenarios side by side
Scenarios come from Rental Property Calculator, Fix & Flip Calculator, BRRRR, Airbnb, and other Real Estate tools that save deals.
Rent Pricing Intelligence
Required rent for break-even, 8% or 10% cash-on-cash, and market risk.
Property & Financing
Operating Expenses (annual $)
Lease Profitability Simulator
10-year projection with rent escalation and expense growth.
Vacancy Risk Calculator
True vacancy cost and risk-adjusted return.
Property Expense Benchmark
Compare your ratios: maintenance, CapEx, tax, insurance → Healthy / Risky / Overleveraged
Portfolio Analyzer
Aggregate 2–20 properties: total return, DSCR, leverage, net worth impact
Properties (add up to 20)

Enter at least 2 properties. Leave value/debt at 0 if unknown; portfolio return uses cash flow only.

Loan & Mortgage
Big financial decisions — conventional, FHA & VA loans with taxes, insurance, PMI/MIP, payoff, refinance and APR views.
1) Property & Loan Basics
2) Program-specific
Conventional: PMI
3) Closing Costs & Cash-to-Close
4) Monthly Ownership Costs
5) Payment Strategy
6) Scenario Settings

Show amounts as:
A) Real Monthly Cost

Payment breakdown
B) Program Cost Impact

C) Cash to Close

D) Loan Summary & Payoff

E) Amortization & Milestones

F) Extra Payments & Biweekly

G) Equity Projection

Chart
Balance & payments over time
Formula: PMT = P × (r(1+r)^n) / ((1+r)^n − 1); r = annual rate/12, n = months
Home & Rent Affordability
Big financial decisions — how much house or rent you can afford: income and debt → max home price or max monthly rent. Combines house affordability, rent affordability, and DTI.
Affordability type
Income & debt
Loan & costs
DTI rule
Reverse: target home price
Comparison
Price tiers
Monthly payment at max price
Required income (target price)
Financial health
Approval strength
Lifestyle impact
Down payment
Income comparison
Budget breakdown
Home Equity & HELOC
Big financial decisions — available equity, Home Equity Loan vs HELOC comparison, costs over time, stress tests, and a clear recommendation.
Your home
Home Equity Loan
HELOC
Best loan payment plan
HELOC draw & repayment
Total cost over time
Net cash & equity
Payment stress test
HELOC sensitivity
Equity vs loan balance
Payment timeline
Recommendation

Rent vs Buy Analyzer

Compare the true financial impact of renting versus buying over time, including ownership costs, investing opportunity cost, and break-even timing.

Timing

Analysis exit sets the year for the main result (verdict, costs, thresholds). Leave blank to use the chart range. Charts/tables can extend farther than that year. Planned stay is only for the early-exit stress case when it is shorter than your analysis exit.

Home purchase

Financing

Ownership costs

Recurring costs are annualized in the model. Moving costs are one-time transaction costs at entry and exit.

Rent assumptions

Tax & investing

Tax savings are a simplified marginal-rate approximation on deductible mortgage interest and property tax. Not a full tax return; use toggles to reflect itemizing vs standard deduction.

Advanced options

Financing details

Ownership, moves & downside

Modeled once after the first month. The Downside scenario uses at least 10% if this stays at 0.

Rent-side options

Subjective: extra you value renting’s flexibility — not a landlord invoice. It increases modeled rent-side cost.

Tax & deduction details

Deductions use a simplified marginal-rate estimate; bracket phase-outs, AMT, and full return interactions are not modeled. Use toggles as directional guidance.

Presets fill the return fields as an assumption shortcut—not a back-tested portfolio.

Scenarios & risk

Adjust how much conservative vs optimistic scenarios move appreciation, rent growth, and investment return relative to your base inputs.

House Flipping Profit
Purchase, repair, sell price, and costs → profit and ROI.
Down Payment
Purchase price and down % → down payment amount.
Closing Cost
Estimate closing costs from purchase price or loan amount.
Price per Square Foot
Price and square footage → $/sq ft (or enter $/sq ft to get price).

Price Per Square Foot Calculator

Quick answer

$/sf = price ÷ livable square feet. If you are more than ~1 standard deviation above the micro-market band for matched quality, you need a reason—view, schools, lot width, or new build—or you are overpaying.

For a related estimate, see Rental Cash Flow Calculator.

Explore further: Cash On Cash Return Calculator · Dscr Calculator

Core formula

Price per SF = contract price ÷ livable SF. For investment, implied rent per SF = monthly market rent ÷ livable SF—compare to operating margin via cap rate. Excluded: land value for land-heavy parcels where house SF undercounts total value.

Explore further: Airbnb Calculator · Brrrr Calculator

$/sf normalizes price for size so you can scan comps fast—but it ignores layout, lot, and income. Use it for offer discipline on similar product; for rentals, always tie basis to NOI and cap.

How to use this calculator

  • Match measurement definitions: Appraisers use ANSI-style living area; some listings include basements or garages—mixing them makes $/sf meaningless.
  • Adjust for unpriced value: Flat yards, quiet streets, and extra parking do not show up in $/sf but show up in resale.
  • Triangulate to income: On rentals, divide NOI by feet if you want “rent per sf” economics—$/sf without rent is decoration.

Cheap $/sf can be expensive income

A low $/sf with terrible rent/sf is a worse deal than a moderate $/sf with strong NOI—basis must connect to cash.

Real-world examples

  • Case study: $515k, 2,050 sf: $/sf ≈ $251. Comps $235–$255/sf for same vintage—you are at the top of band. If rent only supports a 5.5% cap at $515k but comps trade at 6.5% caps, the “fair” $/sf is not fair to your income statement.
  • New build +$35/sf: Paying $35/sf more for new construction buys warranty and lower near-term capex—amortize that premium against avoided repairs over the first decade.

What to decide

Use $/sf to flag outliers before you fall in love with finishes; use rental investment math to decide if the outlier is justified. If $/sf is low and title or zoning is messy, you are not buying a discount—you are buying risk.

FAQ

Is $/sq ft enough to price a home?

It is a comp shortcut, not a substitute for adjustments—beds, baths, condition, lot, and location still move value more than raw size.

Do I use living area or total footprint?

Match what your comps report—mixing finished basement SF with above-grade comps skews the ratio.

Why compare $/sq ft across zip codes?

You mostly should not—schools, tax, and demand layers differ; use hyperlocal closed sales.

How does $/sq ft relate to cap rate?

Price per foot helps you sanity-check pay-in; [cap rate](/cap-rate-calculator) tests whether the income justifies that basis.

1031 Exchange Calculator
Estimate tax-deferred exchange: relinquished and replacement property, boot, and deferred gain.
Relinquished property (sold)
Replacement property (bought)

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