About Property Rental Calculator
A free, no-sign-up tool for running the numbers on a rental property, built and maintained under Ready Utilities.
What this site is for
Property Rental Calculator exists to do one thing well: take a property's price, financing, rent, and expenses and turn them into the metrics investors actually use, monthly cash flow, cap rate, cash-on-cash return, NOI, and DSCR. No account, no email wall, no upsell to a paid tier. You type numbers, you get answers, and nothing you enter leaves your browser.
How the calculator is built
The tool doesn't invent its own math. Every metric follows a standard, published real estate formula, and the calculation logic runs client-side in plain JavaScript so you can view the source and check it. The definitions behind each figure are drawn from established financial references rather than a personal opinion about what a formula "should" be:
- Cap rate and NOI follow the standard definitions used by lenders and analysts (see Corporate Finance Institute).
- Cash-on-cash return uses annual pre-tax cash flow over total cash invested, as described by JPMorgan.
- DSCR is NOI over annual debt service, the ratio commercial lenders use to size loans (Wall Street Prep).
You can see the full method, worked out step by step, right on the calculator page.
Who's behind it
Property Rental Calculator is a Ready Utilities project. Ready Utilities is run by Cedrick Reese, a web developer who builds free online tools. To be clear about where the expertise sits: the value here is careful, transparent, well-cited tooling, not personal investment advice. Cedrick builds and maintains the calculator; the financial definitions come from the published sources cited above and in the methodology. If you ever spot a formula or result that looks off, the contact page is the fastest way to flag it.
About the founder
Ready Utilities was founded by Cedrick Reese, a retired veteran and web developer who enjoys building free, user-friendly online tools that simplify everyday tasks. My journey began in the early 2000s with affiliate marketing and niche site development, which grew into a passion for creating practical digital utilities and calculators. After retiring, I earned a Computer Systems Technician certificate from UEI College, completed Electro-Mechanical Technologies at Tulsa Welding School, and finished the Carpentry program at Florida State College at Jacksonville. Today, I combine my technical background and craftsmanship by building furniture using traditional woodworking methods, gardening, and developing helpful online tools for users worldwide.