SFM Wizard Speeds & Feeds
Machinist Calculator

Less really is more.
SFM Wizard was built around just two constants—SFM and chipload. It isn’t trying to be a flashy, feature‑packed calculator, and it’s not meant to compete with the big, everything‑and‑the‑kitchen‑sink tools out there. It was designed as a companion to the Speeds & Feeds Blueprint Workbook, with one purpose: to help you understand the numbers themselves and what those numbers are actually doing, rather than dragging a slider to make things “faster” or “slower.”

You’ll also notice there’s no built‑in database of materials, SFM values, or power‑unit tables. That’s intentional. The goal is to push you to develop your own correct numbers, grounded in real machining logic—not presets.

And even without the bells and whistles, SFM Wizard still generates every value you need for proper speeds and feeds. Once you supply real, meaningful inputs, the calculator gives you clean, accurate outputs—nothing hidden, nothing automated behind the curtain, nothing to distract you from learning the fundamentals that actually matter.