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.

MayoCalc

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

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