MayoCalc
150+ free calculators for finance, health, math & more
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Travis Cook

MayoCalc - 150+ free calculators for finance, health, math & more

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MayoCalc offers 150+ free online calculators for finance, health, math, and everyday life. Compound interest, mortgage, BMI, calcium score, retirement, lab results interpreter, crypto staking, 50-state paycheck calculators, and more. No sign-ups, no paywalls. Everything runs in your browser.

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Travis Cook
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Hey Product Hunt! I built MayoCalc because I was tired of calculator sites that force you to sign up, blast you with pop-ups, or hide results behind a paywall. Every tool on MayoCalc is completely free and runs entirely in your browser. Nothing is stored or sent to a server. A few highlights I'm proud of: CT Calcium Score Calculator using exact MESA study percentile data for all 8 demographic groups, with a printable report you can bring to your cardiologist. Lab Results Interpreter that explains CBC, CMP, lipid panel, and thyroid results in plain English 50-state paycheck calculators with 2025 tax brackets. Crypto staking rewards, compound interest, FIRE calculator, and more. The whole site is static HTML/CSS/JS hosted on Cloudflare Pages. No framework, no build step, no backend. I'd love to hear which calculators you'd want to see next.