Property & Real Estate Calculators

Free tools for buying, renting, selling and investing in property

Run the numbers on any property decision in minutes. Compare renting against buying, estimate property tax, size up a rental deal by cap rate and cash-on-cash return, work out what you’ll net from a sale, and plan the tax side of selling or exchanging real estate — every calculator shows its formula and assumptions.

24 property calculatorsFormulas shown, no sign-upTax rules cited to IRS publicationsUpdated October 2026
Manzoor Ahmad By Manzoor Ahmad · 13+ years of web development & SEO experience
Last reviewed: October 21, 2026

What is a real estate calculator? A real estate calculator turns property numbers — price, rent, expenses, loan terms and tax rates — into decision metrics such as monthly cost, cap rate, cash-on-cash return, net sale proceeds or tax owed. Homebuyers use them to compare renting with buying and estimate property tax; landlords use them to price rent; investors use them to screen rental, BRRRR and flip deals before making an offer.

Buying, Selling & Ownership Costs

For homeowners and buyers: the true cost of owning, what a sale really nets, and the tax bill that comes with it.

Rent Calculators for Tenants & Landlords

Everyday rent math — what you can afford, what a partial month costs, and how much a rent increase really is.

Rental Property & Investment Analysis

The metrics investors and lenders use to screen and underwrite income property — start with the Rental Property Calculator for a full deal view.

Investing Strategies & Real Estate Tax

Model value-add plays and the tax rules that decide what you keep when you sell or swap a property.

Home Equity & Home Loans

Know what your home is worth to you on paper, what borrowing against it would cost, and what a mobile or manufactured home loan would really cost each month.

Land, Space & Construction

Measure a home or lot accurately and estimate what it would cost to build — figures that drive price per square foot and appraisals.

No calculator matches that search yet. Try a broader term such as “rent”, “tax” or “rental”.

Which Property Calculator Do You Need?

Start from the decision in front of you, not the formula. This table maps the most common property questions to the right tool and the number it gives you.

Your questionUse this calculatorThe number you get
Should I keep renting or buy a home?Rent vs BuyBreak-even year and net-worth gap
How much will property tax add to my payment?Property TaxAnnual and monthly tax
How much rent can I afford on my salary?Rent AffordabilityComfortable and maximum rent
Is this rental a good deal?Rental PropertyCash flow, cap rate, CoC, DSCR
Will a lender approve a DSCR loan on it?DSCRDSCR and minimum qualifying rent
What will I walk away with if I sell?Seller Net ProceedsCash at closing
Will I owe tax when I sell?Capital Gains TaxTaxable gain after exclusion
How much can I borrow against my home?Home Equity LoanEquity, LTV and borrowing limit
Should I take a flexible line of credit instead?HELOCDraw and repayment payments
Will this fix-and-flip make money?House FlipNet profit, ROI and max offer
Can I recycle my cash into the next rental?BRRRRCash left in the deal after refinance
How much will it cost to build a house?Cost to Build a HouseBudget by state, city or UK route
What would a manufactured home cost per month?Mobile Home LoanChattel vs land-home payments
How big is my home or room?Square FootageLiving area, m² and a floor plan

Key Real Estate Formulas at a Glance

Every calculator in this hub is built on a handful of standard formulas. Knowing them lets you sanity-check any listing in your head before you open a tool.

MetricFormulaCommon rule of thumb
Net operating income (NOI)Gross rent − vacancy − operating expensesExcludes mortgage payments and depreciation
Cap rateNOI ÷ property value × 100Lower in high-demand cities, higher in smaller or riskier markets
Cash-on-cash returnAnnual pre-tax cash flow ÷ total cash invested × 100Many investors target roughly 8%–12%
DSCRNOI ÷ annual debt serviceLenders commonly look for 1.20–1.25 or higher
Gross rent multiplierPrice ÷ gross annual rentLower GRM = cheaper relative to income
Gross rental yieldAnnual rent ÷ price × 100Net yield subtracts running costs first
1% ruleMonthly rent ≥ 1% of purchase priceA quick screen, not an underwriting standard
70% rule (flips)Max offer = ARV × 0.70 − repair costsLeaves room for holding, selling costs and profit
Home equityMarket value − all loan balancesLenders often cap combined LTV near 80%–85%

Rules of thumb are screening shortcuts that vary by market, property type and interest-rate environment. Use them to shortlist deals, then run the full calculator.

How to Get Accurate Results From a Property Calculator

Calculators are only as good as their inputs. These four habits close most of the gap between an online estimate and what actually happens at closing or at tax time.

  1. Use real local numbersPull the actual tax rate from your county assessor, insurance quotes, and rent comps — not national averages.
  2. Budget for the unglamorous costsInclude vacancy, repairs, capital expenditures, management and closing costs; leaving them out flatters every return metric.
  3. Stress-test the dealRerun it with a higher rate, lower rent and longer vacancy. A deal that only works in the best case isn’t a deal.
  4. Confirm tax questionsUse the tax calculators to size the issue, then confirm exclusions, exchanges and recapture with a CPA or enrolled agent.

Financing a Property? Pair These With Our Mortgage Tools

Property decisions almost always involve a loan, so these hubs pick up where this one stops.

Property & Real Estate Calculator FAQs

There is no single “good” cap rate — it depends on location, property class and interest rates. Prime urban properties often trade at lower cap rates because they are seen as safer, while smaller or riskier markets offer higher cap rates to compensate. Compare a property’s cap rate with similar recent sales in the same area rather than with a national figure.

Cap rate divides NOI by the property’s value and ignores financing, so it compares properties on equal footing. Cash-on-cash return divides your annual cash flow after the mortgage by the cash you actually invested, so it reflects your leverage. A property with an average cap rate can still deliver a strong cash-on-cash return if it is financed well — or a weak one if rates are high.

Most US jurisdictions multiply the assessed (taxable) value of a property by the local tax rate, often expressed as a millage rate — $1 of tax per $1,000 of assessed value per mill. Exemptions such as a homestead exemption reduce the assessed value first. Because rates and assessment rules are set locally, check your county assessor’s figures for an exact bill.

A common guideline is to keep rent near 30% of gross monthly income, and many landlords require gross income of about 40 times the monthly rent. Those rules ignore debt payments and local costs, so a budget-based calculation that subtracts your other obligations gives a more realistic ceiling.

Buying tends to win the longer you stay, because upfront and selling costs are spread over more years while equity builds. Renting can win over short stays, in high price-to-rent markets, or when your down payment would earn more invested elsewhere. A rent vs buy calculator finds the break-even year for your specific numbers.

If you owned and lived in the home as your main residence for at least two of the five years before the sale, IRS Publication 523 lets you exclude up to $250,000 of gain ($500,000 for most married couples filing jointly). Gain above the exclusion, and gain on investment property, is generally taxable at capital gains rates.

A 1031 like-kind exchange lets an investor defer capital gains tax by reinvesting sale proceeds from business or investment real estate into another qualifying property. You must identify replacement property within 45 days and close within 180 days, and any cash or debt reduction you receive (“boot”) is taxable.

Many DSCR lenders look for a ratio of roughly 1.20 to 1.25, meaning rental income covers the debt payment with a 20%–25% cushion. Some lenders will go to 1.0 or slightly below with a larger down payment or a higher rate. A DSCR calculator shows the minimum rent that hits each threshold.

Divide monthly rent by the number of days in that month to get a daily rate, then multiply by the days you occupy the unit. Some leases use a 365-day year (monthly rent × 12 ÷ 365) or a 30-day banker’s month instead, which produces slightly different amounts — your lease decides which method applies.

Under IRS Publication 527, residential rental buildings are depreciated over 27.5 years using the straight-line method; land is never depreciated. When you sell, the depreciation you claimed (or could have claimed) is generally subject to recapture tax, which is what the depreciation recapture calculator estimates.

Yes. Every calculator on DexoCalc is free, runs in your browser and needs no account. Your inputs are not sent to us or stored, so you can model private numbers such as income, loan balances and sale prices safely.

The math is exact; the uncertainty lives in the inputs. Estimates for rent, vacancy, repairs, appreciation and tax rates drive most of the difference between a calculator’s answer and reality. Use local data, run a pessimistic scenario, and treat results as planning estimates rather than tax, legal or lending advice.

Manzoor Ahmad, author of DexoCalc property calculators

Manzoor Ahmad

13+ years of web development & SEO experience · Founder, DexoCalc

Manzoor builds and maintains every DexoCalc calculator, including the full mortgage and finance calculator libraries. Each property tool on this page is built on published formulas and official guidance, with its assumptions listed on the page so you can check the math yourself.

More about Manzoor →

DexoCalc property and real estate calculators provide estimates for education and planning. They are not tax, legal, appraisal or lending advice. Tax rules, rates and lender requirements change — confirm decisions with a licensed professional.