Calculy
48+ blazing-fast, free calculators. Zero signups required.
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Dawid

Calculy - 48+ blazing-fast, free calculators. Zero signups required.

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Calculy is a collection of 48+ free, instant onlinecalculators for finance, energy, auto, and everyday ecisions. Available in 5 languages (EN, DE, FR, ES, L). No signup, no backend, no tracking — just fast, ccurate tools. PRO calculators include interactive carts, scenario comparison, CSV export, and calculatin history. Built static-first for speed.

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Dawid
Maker
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Hey Product Hunt! 👋 I built Calculy because I was tired of searching for simple financial answers and landing on bloated, ad-heavy calculator sites that wanted me to sign up before showing results. So I built my own — from scratch, static-first, no backend, no accounts, no tracking. What started as a mortgage calculator grew into 48+ tools covering finance (loans, compound interest, ROI, debt payoff), energy (solar ROI, heat pump costs), auto (TCO, lease vs buy), and everyday math (percentages, unit conversion, time calculations). What makes it different: - 100% free, no signup required - Available in 5 languages (EN, DE, FR, ES, PL) - PRO calculators with interactive Chart.js charts, scenario comparison, and CSV export - Blazing fast — static HTML + vanilla JS, no frameworks, loads in under 1 second - Privacy-first — no cookies, no tracking, no data collection I'm a solo developer and this is a long-term project. Would love to hear your feedback — which calculators do you use most often? What's missing?