Calcrux

Calcrux is a collection of over 100+ free calculation tools designed for ecommerce sellers, manufacturers, founders, and investors. The platform provides immediate utility for financial planning and business operations with tools for measuring profit, overall equipment effectiveness (OEE), SIP, burn rates, and income tax across 9 markets without requiring a sign-up. Too many business decisions are made on gut feeling because the right tool is behind a paywall, buried in a spreadsheet, or simply doesn't exist. We've already built 100+ precision tools — calculators, simulators, estimators — and are scaling to 500+, each backed by real domain logic: actual fee schedules, ISO manufacturing standards, and verified financial formulas. Anyone on the planet can use them, free, forever. Calcrux auto-detects your country and adapts currency, tax labels, and number formats for nine regions: the US, India, UK, Australia, Canada, UAE, Singapore, Germany, and France. You can also switch region manually.