The latest articles on DEV Community by Mizanur Rahaman (@mizanur_rahaman_513a18e42). https://dev.to/mizanur_rahaman_513a18e42 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3979016%2F0b1c15e8-5147-4065-aa0e-195fc7b0febc.jpg https://dev.to/mizanur_rahaman_513a18e42 en Mizanur Rahaman Thu, 11 Jun 2026 08:05:12 +0000 https://dev.to/mizanur_rahaman_513a18e42/i-built-150-free-calculators-no-ads-no-sign-up-just-tools-10g9 https://dev.to/mizanur_rahaman_513a18e42/i-built-150-free-calculators-no-ads-no-sign-up-just-tools-10g9 <p>For the past few months I've been building CalcMora — a free <br> online calculator site. No ads, no paywalls, no sign-up required.</p> <p>Just fast, accurate tools that work on any device.</p> <h2> Why I built it </h2> <p>Most calculator sites are cluttered, slow, or show you a number <br> with zero explanation. I wanted something cleaner — tools that <br> show you the formula, a worked example, and an FAQ so you actually <br> understand your result.</p> <h2> What's live right now </h2> <ul> <li>💰 <strong>Finance</strong> — loans, mortgage, salary, tax, investments</li> <li>❤️ <strong>Health</strong> — BMI, calories, body fat, protein, pregnancy </li> <li>🧮 <strong>Math</strong> — percentages, fractions, geometry, GPA</li> <li>🔁 <strong>Converters</strong> — length, weight, temperature, currency</li> <li>📅 <strong>Date &amp; Time</strong> — age, countdowns, days between dates</li> <li>✨ <strong>Everyday Life</strong> — tips, bills, travel, shopping</li> <li>🏆 <strong>Sports</strong> — performance, stats, planning tools</li> </ul> <h2> Tech stack </h2> <ul> <li> <strong>Astro</strong> — static site generator</li> <li> <strong>Cloudflare Pages</strong> — hosting and CDN</li> <li> <strong>Vanilla JS</strong> — all calculators, no frameworks</li> <li> <strong>Schema.org</strong> — structured data on every tool</li> </ul> <h2> The goal </h2> <p>3,000+ tools. Building one new calculator every day.</p> <p>Every tool has competitor gap analysis, unique features, 1,000+ <br> words of original content, and full Schema markup.</p> <h2> Try it </h2> <p>👉 <a href="https://calcmora.com" rel="noopener noreferrer">calcmora.com</a> — completely free, forever.</p> <p>Would love feedback from the DEV community — what calculators <br> do you wish existed? Drop them in the comments 👇</p> showdev sideprojects tooling webdev