About RabixAI

RabixAI is a free, independent collection of online calculators and AI tools built on one stubborn idea: the everyday math people look up — a monthly mortgage payment, a percentage, sales tax, a body-mass index, the days between two dates — should not be locked behind sign-up walls, paywalls, or apps you have to download. It should just work, instantly, in the browser you already have open, and it should be honest about how it got the answer.

Our mission

We want to be the most trustworthy place on the web to run a quick calculation. Every tool here is free, requires no account, and shows the exact formula it uses. We would rather teach you how a number is produced than ask you to take it on faith. If you can see the math, you can check it, learn from it, and adapt it to your own situation — and that is the entire point of RabixAI.

Who it's for

RabixAI is for the person comparing two job offers and converting an hourly wage to an annual salary. It's for the first-time homebuyer trying to understand what a monthly payment really includes. It's for the freelancer pricing a project, the student double-checking a percentage, the small-business owner working out a profit margin, and anyone curious enough to want to see the working, not just the result. No finance background, no spreadsheet skills, and no software required.

How we build the tools

The formula is always shown

Most calculator sites hand you a number and expect you to trust it. We do the opposite. Each tool publishes the formula it runs and the assumptions behind it — rounding, compounding frequency, what is and isn't included — right there on the page, so the result is reproducible by hand or by a teacher at a whiteboard.

The math is verified, not guessed

Before a calculator goes live we test it against known reference values: worked textbook examples, government and financial-institution figures, and independent spreadsheets built from the same formula. When a tool involves standard methods — like the amortization formula behind a loan payment or the compound-interest equation behind a savings projection — we use the established, widely-documented version and state it plainly so you can compare it to any other source.

Everything runs privately, client-side

The numbers and text you enter are processed locally in your browser with JavaScript. They are never sent to a server, never stored, and never associated with you. Close the tab and the data is gone. That is not a setting you have to find — it is simply how the tools are built.

The editorial approach

Alongside the tools we publish plain-language guides that explain the concepts behind them — how a mortgage payment is calculated, how compound interest grows money over time, the difference between margin and markup. These articles are written and reviewed in-house by the RabixAI editorial team, led by founder and editor Anas Rabja. We aim for clear, US-focused explanations with real worked examples, and we revisit them as conventions change. We are practitioners and writers, not licensed advisors, so our material is educational — never personalized financial, medical, legal, or tax advice. For anything important, please confirm the figures with a qualified professional. See our Disclaimer for the full picture.

How we keep it free

RabixAI is an independent, ad-supported service. We display a small number of clearly-labelled advertisements through Google AdSense and other partners, and that revenue covers hosting and lets us keep every tool free for everyone, forever. There is no premium tier and nothing to upsell. You can read exactly how advertising and cookies work on our Privacy Policy page.

Get in touch

Spotted a bug, found a number that looks off, or want a tool we haven't built yet? We genuinely want to hear it — reader feedback is how this site improves. Email us at hello@rabixai.com or use the contact form, and a real person will read it.