Real Estate Calculators

Decision-support calculators for buyers, sellers, and small landlords.

About real estate calculators

Real estate calculators cover the mathematics of home buying, home selling, and rental property investing. Buyer tools include home affordability (using the CFPB 28/36 rule and lender-approved-max analysis), mortgage payment (principal, interest, taxes, insurance — PITI), down payment strategies, and closing cost estimation. Home appraisal-adjacent tools include comparable-property analysis, property tax calculations by state (Hawaii 0.28%% low, New Jersey 2.49%% high), and cost-per-square-foot benchmarking.

Seller tools include net-proceeds calculators (sale price minus real estate commission, transfer taxes, prorated property taxes, seller-paid closing costs, and mortgage payoff), capital gains tax on home sale (with §121 exclusion of $250K single / $500K MFJ per IRS Publication 523), and staging ROI estimates.

Investor tools handle rental property analysis: cash-on-cash return, capitalization rate (net operating income ÷ property value), 1%% rule and 50%% rule quick screens, gross rent multiplier, and debt service coverage ratio (DSCR) — all industry-standard metrics used by real estate investors and lenders. Fix-and-flip calculators estimate rehabilitation ROI, and BRRRR (buy-rehab-rent-refinance-repeat) analysis integrates purchase, renovation, and refinance economics.

Refinance and renovation calculators include: refinance break-even months (fees ÷ monthly savings), cash-out refinance for renovation funding, HELOC (home equity line of credit) payment and interest math, and specific renovation ROI (kitchen remodel, bathroom addition, deck construction — with regional cost variance noted where relevant).

These tools are used by first-time home buyers for affordability analysis, existing homeowners for refinance and renovation decisions, real estate investors for property screening, and real estate agents for client advisory calculations. Real property valuation ultimately requires local market expertise these calculators cannot provide; the tools support decisions but do not replace a licensed appraiser or real estate professional.

Reviewed by the ScoutMyTool editorial team. Formulas verified against primary authoritative sources.

All tools

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Cap Rate Calculator
Capitalization rate = NOI / Property Value × 100. Property's annual return excluding financing.
Cash-on-Cash Return Calculator
Annual pre-tax cash flow / total cash invested × 100. Measures return on actual money in.
NOI (Net Operating Income) Calculator
NOI = gross income − operating expenses. Excludes mortgage payments, capex, depreciation, and income tax.
Gross Rent Multiplier (GRM) Calculator
GRM = property price / gross annual rent. Quick screening metric (lower is better).
DSCR (Debt Service Coverage Ratio) Calculator
DSCR = NOI / annual debt service. Lenders typically require ≥ 1.20-1.25.
Rental Property ROI Calculator
Total return = (cash flow + appreciation + principal pay-down + tax benefit) / cash invested. The full picture.
1% Rule Calculator
Quick rental screening: monthly rent should be ≥ 1% of purchase price.
50% Rule Calculator
Rule of thumb: operating expenses ≈ 50% of gross rent. Quick NOI estimator.
BRRRR Method Calculator
Buy + Rehab → Rent → Refinance (75% LTV) → Repeat. Compute cash recovered + ongoing cash flow.
Fix-and-Flip Profit Calculator
Profit = sale − purchase − rehab − holding − selling costs.
Property Holding Cost Calculator
Holding = (taxes + insurance + utilities + interest) × months.
Rehab Budget Calculator
Sum cosmetic / mid / heavy rehab line items + contingency.
After-Repair Value (ARV) Calculator
ARV = avg comp $/ft² × subject ft². Average from 3-5 sold comps within 1 mile, last 6 months.
Max Purchase Price (Target Cap Rate)
Max purchase = NOI / target cap rate. Reverse-engineer from desired return.
Cash-Out Refinance Calculator
Cash out = (new loan − old loan payoff) − closing costs.
1031 Exchange Basis Calculator
New basis = old adjusted basis + boot − deferred gain. Section 1031 like-kind tax deferral.
Buy vs Rent Breakeven Years
Years until total ownership cost (mortgage + property tax + maintenance + opportunity) equals total rent.
Mortgage Points Break-Even Calculator
Decide whether paying discount points is worth it: compare monthly payments with and without points and find the break-even month.
Mortgage PMI Removal Calculator
Find when your private mortgage insurance can be removed — the month your loan reaches 80% LTV (request) and 78% LTV (automatic termination).