Data-driven financial tools and analysis
Free calculators and comparison tools for real estate investing, mortgages, taxes, and insurance — built on real market data, not estimates.
NumbersLab builds free financial tools that use institutional-grade data sources — the same data that banks, REITs, and economists rely on — and makes it accessible to everyone. We believe financial decisions should be based on real numbers, not guesswork. Whether you're analyzing a rental property, comparing mortgage options, estimating your tax liability, or shopping for insurance, you deserve accurate data and transparent methodology without paying $50–$200/month for a subscription.
Every tool we build follows three principles: use real data from authoritative sources (Zillow ZHVI/ZORI for home values and rents, IRS tax brackets for income tax, NAIC rate filings for insurance costs, Census Bureau for demographics), run the actual math with conservative assumptions (not simplified estimates that inflate returns), and make it free for everyone with no signup walls, no paywalls, and no lead-gen tricks.
Across our four sites, we track data for 775+ metro areas across 51 states, serve hundreds of thousands of users, and provide the tools people need to make smarter financial decisions. We also publish The Numbers Letter, a free weekly newsletter with market analysis and investment insights, and share educational content on our YouTube channel.
CapRateCity is built and edited by Jake McEwen, the founder of NumbersLab. Jake is the writer, researcher, and developer behind the calculators, market data, and articles on this site. NumbersLab also operates the sister sites MortgageMathLab, TakeHomeTax, and InsuranceCostCity. Connect with Jake on LinkedIn or email jake@capratecity.com.
CapRateCity is an educational resource. Jake is not a licensed real estate agent, broker, financial advisor, or tax professional, and nothing on this site is advice. See our disclaimer for the full statement.
NumbersLab maintains a portfolio of free financial tools, each focused on a specific domain. Together, they cover the full spectrum of financial decisions that homeowners, renters, and real estate investors face:
We also build a free Chrome extension that shows cap rate, cash flow, and investment returns on every Zillow and Redfin listing — right on the page. No copy-pasting into spreadsheets.
Accuracy is everything. Bad data leads to bad decisions. Here's what powers our tools:
Our free weekly newsletter for investors and anyone interested in financial data. Each week: market analysis, highest cap rate cities, emerging investment opportunities, deal breakdowns with real numbers, and tools updates. No spam, no fluff — just data.
Subscribe to The Numbers Letter →Market analysis, calculator walkthroughs, and data-driven financial content on our YouTube channel.
Questions, feedback, data corrections, or partnership inquiries — we'd love to hear from you.
CapRateCity provides market-level estimates for educational use only. We are not licensed real estate agents, brokers, financial advisors, or tax professionals. Always consult qualified professionals before making financial decisions. Past performance and historical data do not guarantee future results.
For details, see our disclaimer, data methodology, editorial policy, affiliate disclosure, and corrections policy.