Sajid Hussain

Sajid Hussain

AI-powered full stack software developer
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About

Full-stack developer building tools that actually get out of the way. I made Calcrux because I kept running into the same problem: every calculator worth using either had a paywall, asked you to sign up, or was stuck in one country's currency. Calcrux is my attempt to fix that — free, no account needed, works across 9 currencies, and does the math correctly. Started with ecommerce seller tools (Amazon FBA, eBay, Etsy fees), now expanding into India business, investing, manufacturing, and startup finance. Always building, always shipping. If a tool charges for something that should be free, I'm probably already working on the free version.

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Maker History

  • Calcrux
    CalcruxFree platform for people who actually run businesses
    Jul 2026
    • 🎉
    Joined Product HuntJune 16th, 2026

Forums

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5h ago

Calcrux - Free platform for people who actually run businesses

Calcrux is a free online business calculator platform with 100+ tools for ecommerce sellers, manufacturers, startup founders, and investors. Every calculator runs instantly in your browser — covering 9 countries and 9 currencies — with no account, no paywall, and no limit. Calcrux specialises in business operations where those tools are general-purpose. Each tool includes domain benchmarks, smart insights, and formulas verified against professional standards — not textbook approximations.
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