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 to use. Over 46 calculators covering structural, mechanical, and general engineering — all built to current codes (ACI 318-19, AISC 360, PTI) by a licensed Professional Engineer.
Need to save your work, generate branded reports, or run batch calculations? *ficient design Professional adds those capabilities starting at $39/month — a fraction of what traditional engineering software costs.
Mechanical engineer with 20+ years in manufacturing, design, and field engineering. Licensed Professional Engineer in Texas. Brings the real-world problems, the domain expertise, and the stubbornness to get the details right.
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.
Curiosity Lab — where I write about the science, math, and philosophy that keeps engineers up at night.
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 send us an email.