About CalcRay

CalcRay publishes free, accurate personal finance calculators. We build a small set of genuinely useful, scenario-based tools — the kind that give you a real answer for your numbers, not a generic figure you could guess.

What we believe

• Correctness first. Every calculator uses standard, peer-reviewed finance formulas. We document each one on our methodology page so you can check our work.
• Privacy by default. All math runs in your browser. We have no login, no database of your inputs, and we never sell data.
• Honest monetization. The site is supported by display advertising and, where relevant, affiliate partnerships. These never change a calculation or a recommendation.

Who runs CalcRay

CalcRay is an independent publisher of personal finance calculators. We are not a bank, lender, broker, or insurer, and we do not sell financial products — which means our tools have no incentive to steer you toward a particular outcome. The site is supported by display advertising and, where relevant, affiliate links, clearly disclosed; these never alter a calculation or its result.

Our credibility rests on transparency rather than a celebrity byline. Every calculator is built on standard, well-established financial formulas — the same annuity, amortization, compound-growth, and safe-withdrawal math used across the industry — and we publish each one in plain language on our methodology page so anyone can check our work. Nothing is proprietary or hidden.

How we keep the tools accurate

• Open formulas. The exact equations and assumptions behind every tool are documented publicly and kept in sync with the code that runs them.
• Independent references. Concepts and formulas are checked against established, citable sources — for example the Trinity study for the 4% safe-withdrawal rate, and standard loan-amortization mathematics.
• Cross-checks. Each calculator is verified against known worked examples and spot-checked against reputable bank and lender calculators so the numbers line up.
• Corrections welcome. If a result ever looks wrong, tell us the tool and the exact inputs you used and we will investigate and fix it quickly. Accuracy is the entire point of this site.

We deliberately keep our scope narrow — a small set of tools we can stand behind, rather than hundreds we cannot. Where a calculation involves judgment (such as an assumed rate of return), we surface the assumption as an input you control instead of burying it.

Not financial advice

CalcRay is an educational planning tool. It does not account for your full financial situation, taxes in your jurisdiction, or future market behavior. For decisions that matter, consult a qualified professional.

Questions or corrections? Contact us.