A collection of free, useful online calculators and tools to help people save money, plan better, and make smarter decisions.
| Tool | Description | Monetization |
|---|---|---|
| 🐾 Pet Cost Calculator | Monthly & lifetime pet ownership cost | Pet insurance affiliate |
| 🏠 Mortgage Calculator | Extra payment payoff & interest savings | Mortgage rate comparison |
| 💪 BMI Calculator | Body Mass Index with health insights | Fitness programs affiliate |
| 💰 Savings Calculator | Goal timeline with compound interest | Savings accounts affiliate |
| 📊 Subscription Analyzer | Find hidden subscription spending | Subscription manager aff. |
| 🍽️ Tip Calculator | Calculate tips & split bills | Restaurant deals affiliate |
| 📦 Moving Estimator | Budget your move | Moving company quotes |
| ⛽ Fuel Calculator | Trip fuel cost & MPG comparison | Gas price apps affiliate |
- Display Ads — Google AdSense / Mediavine (apply at 10k+ sessions/month)
- Affiliate Marketing — Amazon Associates, ShareASale, niche affiliate programs
- Lead Generation — Moving quotes, mortgage rates, pet insurance comparisons
This is a static website — no build tools, no frameworks, no dependencies.
# Just open in browser
open index.html
# Or serve locally with Python
python -m http.server 8000git init
git add -A
git commit -m "Initial commit"
git branch -M main
git remote add origin https://github.com/YOUR_USER/usefultools.git
git push -u origin mainThen enable GitHub Pages in repo Settings → Pages → main branch.
Drag and drop the folder to netlify.com
npx vercel- Semantic HTML5 structure
- Meta descriptions on all pages
- Open Graph / Twitter cards
- Canonical URLs
- Schema.org structured data
- XML sitemap
- robots.txt
- Mobile responsive
- Fast loading (no frameworks)
- Google Search Console verification
- Google Analytics setup
- User accounts & saved calculations
- More tools (car loan, retirement, calorie, etc.)
- Dark mode
- Multi-language support
- API for other sites to embed our calculators
MIT