Cnc Feed Rate Calculator

Optimize spindle speed and feed rate for smooth, efficient CNC machining.

CNC Feed Rate Converter

Convert between feed rate, spindle speed, flutes, and chip load for CNC milling or routing operations.

Formula

`Feed Rate = RPM × Flutes × Chip Load`

How to use

Select tool diameter and flute count.
Pick material and starting chip load (from manufacturer if possible).
Adjust RPM and feed to achieve chips (not dust) without chatter.
Verify with a test pass; watch heat and surface finish.

Pro tips

• Increase feed or lower RPM if you’re making **dust** instead of chips.
• Downcut for top finish, upcut for evacuating chips, compression for both.
• Keep tools sharp; worn tools need lower chip load.

FAQs

What if it burns?

Increase feed, reduce RPM, or improve chip evacuation.

Do I need dust collection?

Yes—recutting chips increases heat and dulls bits.

Related calculators

Sheet Yield Calculator · Dust Collection Cfm Calculator · Rip Cut Calculator