The latest articles on DEV Community by India India (@india_india_9945771f3c5d7). https://dev.to/india_india_9945771f3c5d7 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4071500%2F46585117-595c-46cd-b93c-aa2461b45297.png https://dev.to/india_india_9945771f3c5d7 en India India Mon, 10 Aug 2026 14:33:48 +0000 https://dev.to/india_india_9945771f3c5d7/im-a-doctor-who-built-a-163-tool-medical-calculator-site-with-zero-frameworks-7nn https://dev.to/india_india_9945771f3c5d7/im-a-doctor-who-built-a-163-tool-medical-calculator-site-with-zero-frameworks-7nn <h2> The problem wasn't "I want to build an app" </h2> <p>I'm not a software engineer. I'm a practising Factory Medical Officer (MBBS, CIH) — I run an Occupational Health Centre inside a factory, and most of my day is pre-placement exams, periodic medical checks, spirometry interpretation, and the occasional shift-floor emergency.</p> <p>The problem was mundane: the same dozen calculations kept coming up — BMI, eGFR, CURB-65, IV drip rates, weight-based drug dosing — and I was doing them by hand or bouncing between five different apps and PDF reference charts, none of which were built for how fast a clinic actually moves.</p> <p>So I built the tool I wanted to open on my own phone. That's it. That's the whole origin story. It became <a href="https://clinixcal.com" rel="noopener noreferrer">ClinixCal</a> — <strong>163 free clinical calculators, drug-dosing tools, and vaccination schedulers</strong>, and it's still growing.</p> <h2> The stack: no framework, on purpose </h2> <p>Every page on ClinixCal is static HTML/CSS/vanilla JS. No React, no build step, no bundler. I know that's an unusual flex on dev.to, but for this project it was the right call:</p> <ul> <li> <strong>Zero build step</strong> means every page is just... a file. Editing one calculator can't break another.</li> <li> <strong>No backend, no database.</strong> Every calculation runs entirely in the browser. Nothing is ever transmitted or stored — which matters a lot when the input is a patient's weight, creatinine, or gestational age.</li> <li> <strong>Deploys are trivial.</strong> It's a GitHub repo, auto-deployed via Cloudflare Pages on every push to <code>main</code>. No CI pipeline to babysit.</li> </ul> <h2> The shared engine </h2> <p>All 163 tools share one JS file, <code>calculators.js</code>, exposing a single <code>MedCalc</code> object. Most weight-based drug dosing collapses into one generic function.</p> webdev javascript heathtech