Hi Product Hunt! I’m a solo developer building LumoCalculator — a fast, free hub of online calculators across finance, health, and everyday math. Why: I needed accurate, distraction-free calculators for clients and students in multiple languages. Most sites are ad-heavy or single-purpose. What’s new/unique: • 40+ tools with a consistent UX and instant results • Multi-language pages and shareable links (no signup) • Clear formulas, examples, and FAQs to reduce mistakes • Mobile-first, lightweight Next.js build for speed Try a few: BMR → https://lumocalculator.com/healt... HELOC Payment → https://lumocalculator.com/finan... Percentage → https://lumocalculator.com/math/... Proud of: speed, clarity, and being useful without noise. Roadmap: more calculators, simple embeds, and an API. Would love feedback—Which calculator should we ship next?

LumoCalculator

free multi-language calculators for finance, health & math

free multi-language calculators for finance, health & math