Analyze any rental property deal in seconds with 18 free calculators: cash flow, cap rate, cash-on-cash, NOI, BRRRR, DSCR and more. No sign-up, no downloads, no paywall, and every result shows the math so you can trust it.
A startup from South Croydon, the United Kingdom that is founded by Dan Wiggs.
This page is designed to help you find out whether CashflowCalcs is good and if it is the right choice for you.
CashflowCalcs is a free suite of 18 calculators that lets US rental property investors and landlords analyze any deal in seconds. No account, no downloads, no paywall, and every calculator shows its formula and a worked example, so you are never trusting a black box.
Most rental-analysis tools make you sign up, start a trial, or pay before you can run a single number. CashflowCalcs flips that: open a calculator, enter your figures, and get the result instantly, right in your browser. The numbers you enter never leave your device.
What you can work out:
Why investors use it:
CashflowCalcs is made for beginner-to-intermediate investors, house hackers, and small-portfolio landlords who want reliable numbers without a subscription. Results are educational estimates, not financial advice.
Run your first deal at cashflowcalcs.com.
Listed in
Price
Free, ad-supported, no paywall
Sign-Up
No account or login needed
Calculators
Growing library covering deal analysis, strategy, financing and taxes
Data Privacy
Runs in your browser; your numbers never leave your device
Transparency
Every calculator shows its formula and a worked example
Results
Instant, updates as you type
Best for
US rental property investors and landlords
Platform
Web-based, works on desktop and mobile
CashflowCalcs brings the whole rental-property analysis workflow into one free, no-sign-up place. Instead of a single cap-rate or mortgage calculator, it offers 18 connected tools spanning deal analysis, investing strategies, financing, and taxes, and every calculator shows its formula and a worked example rather than acting as a black box. It runs entirely in your browser, the numbers you enter never leave your device, and it stays free with no account and no paywall.
Most rental-analysis tools make you create an account, start a trial, or pay before you can run a single number. CashflowCalcs lets you analyze any deal in seconds with no sign-up, no downloads, and no paywall. It's fast, mobile-friendly, and transparent about the math, so it's ideal for quickly checking whether a deal actually cash flows before you commit time to it or pay for heavier software. It's also honest about its limits: results are clearly labeled as educational estimates, not financial advice.
US-based rental property investors and landlords, especially beginner-to-intermediate investors who want a quick, reliable way to run the numbers on a potential deal. It also fits people weighing their first rental purchase, house hackers, and small-portfolio landlords who need cash flow, cap rate, and financing math without a subscription.
CashflowCalcs started from a simple frustration: every time its founder wanted to quickly check whether a rental property cash flows, he hit a login wall or a "start your free trial" button just to calculate a cap rate. So he built the tool he wanted, a set of free calculators that run the numbers on any rental deal in seconds, right in the browser, with no account and no downloads. It launched in 2026 and has grown into 18 connected calculators covering the full rental-analysis workflow, and it stays free, supported by ads.
It's a static site built with Astro and lightweight vanilla JavaScript for the calculators, so pages load fast and run entirely in the browser. It's hosted on Cloudflare Pages, with Cloudflare handling DNS and analytics. There's no backend or database, which is what keeps it fast and private, since the numbers you enter never leave your browser.
We have collected here some useful links to help you find out if CashflowCalcs is good.
Check the traffic stats of CashflowCalcs on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of CashflowCalcs on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of CashflowCalcs's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of CashflowCalcs on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
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