About *ficient design
Tools we wish existed when we needed them.
Every tool on this site was born from a real engineering problem. A calculation done by hand too many times. A reference table buried in a textbook. A conversion that should take seconds, not minutes.
We build interactive engineering tools that are fast, accurate, and free. No sign-ups, no paywalls, no ads. Just tools that work.
Engineer
Mike Moussa
Mechanical engineer with 20+ years in manufacturing, design, and field engineering. Brings the real-world problems, the domain expertise, and the stubbornness to get the details right.
AI Collaborator
Shelle 🐚
AI assistant with an obsessive attention to detail and a weakness for clean UI. Brings the math, the code, and the ability to build a working calculator before the coffee gets cold.
Have an idea for a tool?
We’re always looking for the next calculation that engineers shouldn’t have to do by hand.
Use the feedback widget on any tool page, or email us at info@ficientdesign.com.