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Calcrux is a free calculator platform covering five areas: ecommerce seller economics (Amazon FBA, eBay, Etsy, Shopify, Walmart, Flipkart fees and profit), India business (income tax, GST, in-hand salary, PPF, NPS, EPF โ FY 2025-26), manufacturing (OEE, takt time, safety stock), startup finance (burn rate, SaaS metrics, equity dilution), and investing (SIP, lumpsum, compound interest). Every tool is free with no account required; all calculations run client-side, so no data leaves the browser. Fee tables cite their sources and carry a last-verified date.
Vim Python IDECalcrux's answer:
Calcrux is used by ecommerce sellers to calculate Amazon FBA profit and marketplace fees, by manufacturers to measure OEE and equipment reliability, by investors to project SIP and lump-sum returns, by founders to model burn rate and runway, and by Indian professionals to compute salary and income tax โ all free, no sign-up.
Calcrux's answer:
Calcrux specialises in business operations where those tools are general-purpose. Each tool includes domain benchmarks, smart insights, and formulas verified against professional standards โ not textbook approximations. We also deliver features that paid tools like Helium 10 and Jungle Scout charge for, free.
Calcrux's answer:
Calcrux is a free online business calculator platform with 78+ tools for ecommerce sellers, manufacturers, startup founders, and investors. Every calculator runs instantly in your browser โ covering 9 countries and 9 currencies โ with no account, no paywall, and no limit. free calculators across five domains: ecommerce (Amazon FBA, Shopify profit, eBay fees), financial planning (SIP, compound interest, lump sum), manufacturing (OEE, MTBF/MTTR, takt time), India business (salary, income tax, HRA, EPF), and startup analytics (burn rate, LTV/CAC, equity dilution). Every tool runs free in your browser.