mmtoinch.online was created by a team of mechanical engineers and web developers to provide a professional, accurate, and privacy-friendly unit conversion tool for the engineering community. We understand that in CNC machining, sheet metal fabrication, 3D printing, and mechanical design, every fraction of a millimeter matters. Our mission is to eliminate unit conversion errors that can lead to costly production mistakes.
We saw that most online converters are either too simplistic (single input/output) or lack engineering context. Engineers need batch processing, reference tables, export capabilities, and multi‑directional conversions. mmtoinch.online combines all these features in a clean, ad‑supported free tool. We deliberately avoid storing any user data – all calculations happen locally in your browser.
If you have suggestions, bug reports, or partnership inquiries, please email us at contact@mmtoinch.online. For privacy matters, use privacy@mmtoinch.online.
We are based in the European Union and comply with GDPR regulations.