Launching today
GridCalculators
The calculators for everything - fast & private.
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The calculators for everything - fast & private.
0 followers
A lightning-fast, privacy-first collection of free online calculators for finance, health, math, everyday life, and developer tools. No apps to install, no tracking, and every result is shareable via URL.
Free
Launch Team
Render Sandboxes: a computer for every agentIsolated compute, persistent state and a real filesystem
Promoted
Hey Product Hunt! 👋
I built GridCalculators out of pure frustration. Every time I needed to figure out a loan amortization, check a quick percentage, or use a scientific mode calculator, I was forced to wade through bloated content mills packed with intrusive ads, paywalls, and sketchy download buttons. Worst of all, many of these sites were silently tracking inputs or processing sensitive financial and health data on remote servers.
I wanted to build the exact opposite:
Zero Bloat & Zero Ads: Just clean, minimalist UI that loads instantly.
100% Client-Side Privacy: Every calculation happens directly in your browser. Your numbers never touch a server.
Shareable Links: Inputs are baked right into the URL parameters, making it effortless to send a configured calculation to a colleague or friend.
Transparent Math: Every tool breaks down its exact formulas and includes step-by-step worked examples.
We currently have over 250+ calculators spanning Finance, Fitness & Health, Math, Everyday, and Developer & Media tools, and we add new ones every single week.