FreeCodeCamp estimates 300 hours for the Responsive Web Design certification, but that's a rough average. If you're completely new to HTML and CSS, expect closer to 350–400 hours because you'll need time to absorb concepts and debug your projects. If you already know basic markup, you might finish in 200–250 hours by moving faster through early modules. Most people take 2–4 months in real calendar time. At 15 hours per week, that's roughly 120–240 hours of actual work, meaning many learners skip or rush sections. The five certification projects (tribute page, survey form, product landing, technical documentation, portfolio) are where you actually cement the skills, so don't copy-paste solutions or you'll waste the whole exercise. The curriculum covers HTML fundamentals, CSS basics, applied visual design, accessibility, responsive design principles, flexbox, and CSS grid. The newer 2022 version replaced some outdated content with more practical projects, which actually makes it faster to complete but equally valuable. You're building 15 practice projects plus the 5 certification projects. What slows people down: perfectionism on early projects, not using browser dev tools to debug, and treating it like a race instead of skill-building. What speeds it up: typing code instead of copy-pasting examples, building things outside the curriculum simultaneously, and asking questions in the FreeCodeCamp forum when stuck for more than 30 minutes. At Ottawa SEO, we don't see FreeCodeCamp alone as enough for client work. It's a solid foundation, but you'll still need to learn responsive frameworks, CSS preprocessing, performance optimization, and cross-browser compatibility that aren't covered deeply. The certification proves you understand core concepts, which is valuable for junior roles or internal marketing teams, but building 10–15 real sites outside the curriculum teaches you what actually breaks in production. Treat the 300 hours as your baseline education, not your total training.