Calculate spindle RPM, feed rate, and material removal rate from tool diameter, flute count, cutting speed, and feed per tooth. Built for machinists programming carbide end mills, drills, and turning tools.
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Request a Proposal →Use the result as a starting point, then adjust for tool stickout, machine rigidity, coolant, material hardness, and radial engagement.
It converts tool diameter, cutting speed, flute count, and chip load into practical spindle RPM and feed rate values for CNC programming.
Treat it as a starting value. Reduce the feed or surface speed for long tool stickout, interrupted cuts, weak fixturing, poor coolant, or harder-than-expected material.
RPM is spindle speed. Feed rate is how fast the tool moves through the material, usually in mm/min or in/min.
Use this calculator when you know the tool diameter, flute count, target cutting speed, and chip load, but need practical RPM and feed values for a CNC program.
Continue with closely related tools from the machining calculator library.
Use the calculator freely. If the result points to a tooling or process problem, we can source the exact carbide tooling you need from vetted factories in China. Compare factory-direct pricing.
Before you commit to a spec, it helps to know what the market pays for it. These are real, publicly listed factory prices — not a quotation, and not a guess.
We source the tool families below direct from vetted Chinese factories, matched to the material and tolerance you just worked out. Every batch ships with its material certificate and dimensional record.
GOT YOUR SPEEDS AND FEEDS? The parameters are the easy part. What decides whether the tool actually holds them is what the tool is really made of.
Tell us the part material, lot size, and target price. We’ll match a verified China factory and return a quotation within 48 hours.