I recently launched QuickAgeCalc.com — a free collection of age, date, and pregnancy calculators. Two weeks in, we're at 1,500+ organic visits per week across 47 countries, with zero ad spend.

Here's exactly how I built it, what worked, and what I'd do differently.

The Idea

I noticed that most age calculator sites are:

Slow to load

Cluttered with aggressive ads

Mobile-unfriendly

Missing obvious related tools (pregnancy due date, dog age, date difference)

The opportunity: build a fast, clean, genuinely useful hub of date calculators with programmatic SEO pages for long-tail keywords.

The Tech Stack

Deliberately simple:

Pure HTML/CSS/JavaScript — no frameworks, no build tools

Cloudflare Workers — hosting, global CDN, free tier

GitHub — version control + auto-deploy via GitHub Actions

Cloudflare Pages — deploy on every push to main

Zero monthly cost.…