Free. No account. No paywall.
A speeds & feeds calculator calibrated against real cut data, not just formulas.
Pick your machine, router, bit, and material. Get RPM, feed rate, depth of cut, and chipload back instantly.
Machine data for
Bit data for
Five tools, one workflow
RPM, feed rate, DOC, and chipload for any setup
Machine, router, bit, material in. A full recommendation out, with a slider to dial conservative to aggressive.
Read a G-code file before it touches the spindle
Drop in a G-code or Carbide Create file. See every toolpath, feed rate, and depth at a glance, before the cut.
Diff two G-code files without opening CAM
Drop two files in. See exactly what's different: feeds, depths, operations, no CAM program required.
The full database, browsable and sourced
65 machines, 290 bits, 48 materials. Specs, compatible routers, and the source behind every number.
Your actual rig, saved
Star what you run so the calculator opens ready to go. Add custom bits that aren't in the built-in library.
Not just another feeds & speeds calculator
Most calculators stop at the spec sheet. This one checks it.
Real chipload physics, not a lookup table
Feed rate is derived from chipload, flute count, and RPM, the same relationship a machinist works from by hand. Chip-thinning and DOC-to-chipload coupling run on top, so the output adjusts itself when depth changes.
Sourced from manuals, spec sheets, and community charts
Chipload ranges come from manufacturer databases (Amana, Whiteside, Freud), published bit charts, and the Carbide 3D and IDC Woodcraft spreadsheets hobbyists have traded and corrected for years. Every row cites its source.
Checked against what machines can actually do
A spec sheet says what a bit can cut in theory. It doesn't say a belt-drive router hits a feed ceiling below its stepper limit. Those caps come from forum-reported cuts and real machine behavior.
Try it on your own setup
No signup, nothing to install. Pick your machine and see what it gives you. Feedback on what's off or missing is exactly what makes the data better.