👋 Hey Product Hunt! I got frustrated. Every time I needed a quick calculation, I'd land on some bloated site covered in ads, paywalls, and sign-up prompts - just to find out how much paint I need for a room. So I built Calcosmos. 🚀 84+ calculators across finance, health, science, construction, and everyday life - all free, no sign-up, no tracking. ✅ Instant results as you type ✅ Fully responsive on mobile ✅ Everything runs in your browser - your numbers never leave your device ✅ Searchable across all 84+ calculators Some of my favorites: 📈 Compound Interest - see how your money actually grows 💳 Credit Card Payoff - the results are genuinely eye-opening 🏡 Mortgage Affordability - before you fall in love with a house 🥩 Macro Calculator - for the fitness crowd 🧱 Concrete & Tile - for the builders This is a solo project and I'd genuinely love your feedback. What calculators am I missing? What would make this more useful? Try it free → https://www.calcosmos.com/

Calcosmos

Every calculator you'll ever need for free.

Every calculator you'll ever need for free.