Free Manufacturing Tools & Calculators
Estimate costs, assess suppliers, and plan your product development—all in your browser.
Practical, free tools for hardware founders and product teams. No account required, no data uploaded. Reviewed by James, a Shenzhen-based mechanical engineer and China sourcing consultant with more than 10 years of product-development experience.
Manufacturing Tools
Pick the tool that matches your current need. All tools work in your browser — nothing is uploaded or stored on a server.
Cost Tools
Estimate tooling, prototype, packaging, and BOM costs.
Planning Tools
Assess readiness, timelines, and order feasibility.
Supplier Tools
Evaluate supplier risk and generate RFQs.
Not Sure Where to Start?
I Have a Product Idea—What Should I Do Next?
Answer a few simple questions and get a personalized roadmap for developing and manufacturing your product in China. You do not need a BOM, CAD file, or manufacturing experience to begin.
- Understand your current development stage
- See what information or documents are still missing
- Get the next practical steps in the correct order
- Learn when you are ready to approach factories for quotations
Manufacturing Guides
Practical, engineering-focused articles on working with Chinese manufacturers.
How to Find and Evaluate a Reliable Factory in China
A practical framework for identifying, screening, and evaluating manufacturing partners in China.
Read guideProduct DevelopmentDesign for Manufacturing in China: What to Check Before Sending Files
Key DFM checks to complete before sending your design files to a Chinese factory.
Read guideQualityChina Factory Audit Checklist: An Engineering-Focused Framework
An engineering-driven audit checklist for evaluating factory capability and quality systems.
Read guideMaterialsPlastic Material Selection for Injection Molding
Practical guidance on selecting plastic materials for injection-molded parts.
Read guideHow These Tools Are Built
Real Engineering Experience
Based on 10+ years of product development and manufacturing experience
AI-Assisted Research
AI supports research and drafting, but not final engineering judgment
Reviewed by James
Every tool and article is personally reviewed and corrected before publication
Private by Default
Your data stays in your browser. No account, no upload, no tracking of inputs.
James
Mechanical Engineer & China Sourcing Consultant
Based in Shenzhen, China, James has more than 10 years of experience in mechanical product development and manufacturing.
He combines engineering knowledge with hands-on sourcing experience, helping overseas clients identify and evaluate Chinese suppliers, clarify technical requirements, compare quotations, coordinate samples, follow production, and resolve quality issues.
This site shares practical tools and guidance on product development, supplier sourcing, and working effectively with Chinese manufacturers.
Need Hands-On Support in China?
If you are developing a hardware product and need help with product requirements, supplier sourcing, quotation review, sampling, production follow-up, or quality issues, you can contact James to discuss the project.
Discuss Your Project