Calcrux - Free calculator and simulator platform

Calcrux is a free online calculator platform with 100+ tools across ecommerce, India business and tax, manufacturing, startup, and finance. Every tool is built on real business logic and runs entirely in your browser — no sign-up required.

We're scaling to 500+ tools across five ecosystems: Ecommerce, India Business, Manufacturing, Startup & BI, and Operational Financial Planning. Each tool is built with real business logic, tested against actual use cases, kept current with fee changes, and free — no premium tier, no credits, no account required, ever.