About RentWiseCalc
RentWiseCalc is a free collection of 30+ real estate calculators covering mortgage payments, rental yield, cap rate, cash-on-cash return, fix-and-flip analysis, DSCR loans, tax depreciation, and more. Every tool is designed to answer a specific question a buyer, investor, or landlord faces — instantly, accurately, and without requiring an account.
The site was built out of frustration with existing tools: either paywalled behind real estate software subscriptions, cluttered with ads, buried inside broker websites with upsells at every click, or simply inaccurate. The goal was a single, reliable destination for every calculation a serious real estate decision-maker actually needs.
All formulas are independently verified against published standards. Mortgage amortization uses the standard annuity formula consistent with every major lender. Cap rate and NOI calculations follow CBRE and appraisal industry conventions. Tax depreciation follows IRS Publication 527 (27.5-year residential schedule). Where methods vary — such as DSCR loan minimum ratios across lenders — we document the assumption used and note the range.
Our principles
Accuracy first
Every formula is sourced from established real estate and financial references — lender guidelines, IRS publications, appraisal methodology — and verified against known outputs before launch. If you spot a discrepancy, contact us and we will fix it immediately.
One tool, one job
Each calculator does exactly one calculation and does it well. No upsells, no feature bloat, no prompts to sign up for anything. Find your tool, enter your numbers, get your answer.
Privacy by default
All calculations run in your browser. No data is sent to any server. We use minimal analytics to understand which tools are used most — nothing more.
Always free
Every tool on this site is and will remain free. No paywalls, no account required, no premium tiers. Real estate math should be accessible to everyone.
Who this is for
First-time homebuyers who want to understand affordability before talking to a lender. Rental property investors evaluating deals before making an offer. Landlords modeling rent increases or comparing short-term vs long-term rental strategies. Anyone who wants to verify the numbers behind a real estate decision without subscribing to expensive software.
These are not tools for institutional investors or commercial real estate analysis at enterprise scale. They are built for individual decision-makers — people buying their first home, their third rental property, or their first fix-and-flip — who need to understand the math clearly and quickly.
Disclaimer
All tools on RentWiseCalc are for educational and informational purposes only. Nothing on this site constitutes financial, tax, or legal advice. Real estate investment involves substantial risk, including the potential loss of capital. Tax laws, lending guidelines, and market conditions change frequently. Always consult a qualified financial advisor, CPA, or real estate attorney before making investment decisions.