A free calculator resource built for real decisions — no accounts, no tracking, no nonsense.
CalcHub is a collection of 60+ free online calculators covering finance, health, math, education, cooking, fitness, auto, and more. Every calculator is designed to help you make real decisions with real numbers — whether you're figuring out a mortgage payment, tracking your macros, or scaling a recipe for a dinner party.
We built CalcHub because most calculator sites are cluttered with ads, paywalls, and dark patterns. We wanted something cleaner. Every tool on CalcHub is free, works instantly in your browser, and doesn't require an account or personal information.
We use well-established, peer-reviewed formulas wherever possible. Here are the key formulas powering CalcHub's calculators:
CalcHub is supported by display advertising (Google AdSense). This allows us to keep every calculator completely free. We don't sell data, offer premium tiers, or use affiliate links that bias our results. The ads you see are the only way we keep the lights on.
CalcHub's calculators are designed for educational and informational purposes only. They should not be used as a substitute for professional financial, medical, legal, or other expert advice. Results are estimates based on the inputs you provide and the standard formulas described above.
For financial decisions, consult a qualified financial advisor. For health-related decisions, consult a healthcare professional. For legal matters, consult an attorney. We provide tools to help you think through decisions — the final call is always yours.
No dark patterns. No manipulative design. No upsells. No data harvesting. No required accounts. No paywalls. Just calculators that work, built with care, free for everyone.