🏠 Real Estate Calculators
All 18 free real estate calculators in one place — Explore 18 free real estate calculators for buyers, owners, and investors — from the full-PITI Mortgage Calculator and Rent vs Buy tool to Cap Rate, DSCR, and BRRRR underwriting models.. Every tool runs 100% client-side in your browser: no sign-up, no uploads, instant answers.
Last updated: September 2026 · 18 free tools
The Complete Guide to Real Estate Calculators
A home is the largest purchase most people ever make, and a rental property is a small business wearing a roof. This hub brings together 18 free real estate calculators for buyers, homeowners, renters, and investors — from your first mortgage payment to the cash-on-cash return on your tenth rental. Every tool runs instantly in your browser with no sign-up, and your numbers never leave your device.
Buying a home: know your payment before you fall in love
Start with the Mortgage Calculator: it breaks your monthly payment into principal, interest, taxes, insurance, and PMI (PITI) and shows the full amortization schedule, so you see the true cost — not just the sticker price. The House Affordability Calculator works backward from your income and debts to a price range that will not strain your budget, and the Rent vs Buy Decision tool settles the eternal debate with your local numbers instead of slogans. Budget the fine print with the Home Closing Costs estimator, compare loan programs with FHA vs Conventional, and check whether refinancing pays with the Mortgage Refinance Break-Even calculator. Already own? The Extra Mortgage Payment tool shows how much interest a little extra principal destroys, and HELOC & Credit Line plus Home Equity Loan vs HELOC help you tap equity wisely. The Property Tax & Mill Rate calculator keeps the taxman’s share honest.
Investing: underwrite like a professional
Investors live or die by the numbers. The Cash Flow Rental Calculator projects monthly and annual cash flow after mortgage, taxes, insurance, vacancy, and maintenance — because a property that does not cash flow is a speculation, not an investment. The Cap Rate Calculator and Cash-on-Cash Return Calculator let you compare properties on equal footing, while the DSCR Calculator checks the debt-service coverage ratio lenders actually scrutinize (many want to see 1.2x or better). The BRRRR Calculator models the full buy-rehab-rent-refinance-repeat playbook from purchase to cash-out refi, and the Airbnb Profit Calculator tests whether short-term rental math beats a long-term tenant. Selling? The Real Estate Commission Calculator splits agent commissions in seconds, and landlords can sanity-check commercial terms with the Triple Net (NNN) Lease calculator or split a mid-month move with Prorated Rent.
How to pick the right tool
Buying your first home: Mortgage, House Affordability, Rent vs Buy, Closing Costs — in that order. Refinancing: Refinance Break-Even first, then Extra Mortgage Payment to compare strategies. Evaluating a rental: Cash Flow, then Cap Rate and Cash-on-Cash, then DSCR before you talk to a lender. Selling: Commission calculator plus Property Tax. One honest note: these are estimates for planning, not professional advice — verify consequential numbers with your agent, lender, or attorney before signing.
🏠 All 18 Real Estate Calculators
Every tool below is free, unlimited, and runs entirely in your browser — pick the one that matches your question.
Estimate nightly revenue, occupancy-adjusted income, and costs for a short-term rental.
Model the buy-rehab-rent-refinance-repeat strategy from purchase to cash-out refi.
Compute capitalization rate from NOI and price to compare investment properties.
Project monthly and annual cash flow for a rental property after all expenses.
Measure annual cash return against the actual cash you invested in a property.
Estimate itemized buyer and seller closing costs on US home purchases: lender origination, appraisal, title insurance, transfer taxes, and prepaid escrow.
Calculate debt-service coverage ratio to see if a property qualifies for investor financing.
Calculate how making extra monthly, annual, or lump-sum principal payments cuts years off your mortgage and saves tens of thousands in compound interest.
Compare monthly payments, upfront and annual mortgage insurance (FHA MIP vs Conventional PMI), and long-term costs between FHA and Conventional mortgages.
Calculate 10-year interest-only draw payments followed by 20-year amortized payments on home equity lines of credit.
Compare fixed-rate Home Equity Loans with variable-rate Home Equity Lines of Credit (HELOC). Calculate draw periods, repayment jumps, and maximum borrowing limits.
Find the home price range that fits your income, debts, and down payment.
Accurate monthly home payments including Principal, Interest, Property Taxes, Homeowners Insurance, and private mortgage insurance (PMI).
Calculate mortgage refinance break-even in months, monthly payment reduction, closing cost recovery, and net lifetime interest savings.
Calculate total tenant occupancy costs, annual CAM fees, property tax pass-throughs, and landlord net rental income under commercial NNN lease agreements.
Calculate exact partial month lease payments for move-in or move-out dates with 30-day, 365-day, and banker's rule formulas.
Split listing and buyer-agent commissions on a home sale in seconds.
Compare the 30-year financial impact of buying real estate versus renting and investing down payment capital in the market.
Real Estate Calculator FAQs
Straight answers to the questions people ask most about real estate calculators.
How much house can I actually afford?
A widely used guideline is the 28/36 rule: keep total housing costs (PITI) at or under 28% of gross monthly income, and all debts under 36%. The House Affordability Calculator applies this to your income, debts, down payment, and rate to produce a realistic price range — then confirm it with a lender’s pre-approval.
What is a good cap rate for a rental property?
It depends heavily on the market: investors often cite 5–10% as a typical screening range, with higher cap rates usually signaling higher risk or lower-growth areas. Treat cap rate as a comparison tool between properties, not a verdict — the Cap Rate Calculator pairs best with the Cash Flow Rental Calculator for the full picture.
Should I rent or buy?
There is no universal answer — it hinges on how long you will stay, local price-to-rent ratios, and your down payment. As a rough rule of thumb, buying tends to win if you will stay 5+ years; short horizons favor renting once closing costs and selling fees are counted. The Rent vs Buy tool runs your exact numbers.
What is DSCR and why do lenders care about it?
DSCR (Debt-Service Coverage Ratio) is a property’s net operating income divided by its debt payments. It tells a lender whether the property pays for itself: many investor-loan programs look for a DSCR of at least 1.2, meaning income covers 120% of the mortgage. The DSCR Calculator shows where your deal stands.
How does the BRRRR strategy work?
BRRRR stands for Buy, Rehab, Rent, Refinance, Repeat: you purchase a distressed property, renovate it, rent it out, refinance based on the new appraised value to pull your capital back out, then repeat with the next deal. The BRRRR Calculator models each phase so you can see whether the refi actually returns your cash.
Are these real estate calculators a substitute for professional advice?
No — they are planning estimates. They are ideal for screening deals and comparing scenarios, but appraisals, inspections, title work, and loan terms involve professionals. Verify the numbers that matter with your real estate agent, lender, or attorney before committing.