Feed Rate Calculator
Calculate machine feed rate (IPM or mm/min) from spindle RPM, number of teeth, and chip load, plus the feed per revolution. Inch and metric, in your browser.
Feed rate
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Show the math
Table feed is the spindle speed multiplied by how far each cutting edge advances per revolution:
feed = RPM × teeth × chip load
feed per rev = teeth × chip load
Chip load (feed per tooth) comes from your tooling and material. The result is the feed per minute the machine should travel, plus the equivalent feed per revolution.
What this does
This calculator works out machine feed rate (IPM or mm/min) from spindle RPM, the number of cutting teeth, and the chip load, and also reports the feed per revolution.
How to use it
- Enter the spindle RPM.
- Enter the number of teeth on the tool.
- Enter the chip load (feed per tooth).
- Read the feed rate to program.
How it works
Feed rate is the distance the table travels per minute. Chip load is how far each cutting edge advances per revolution, too low rubs and dulls the tool, too high overloads it. Feed per revolution is simply teeth × chip load.
feed = RPM × teeth × chip load
Understanding your result
The feed rate is the table speed that keeps each tooth cutting at your target chip load. Too low a chip load makes edges rub and dull early; too high overloads the tool and can break it. Adjust RPM, teeth, or chip load together, since changing one shifts the feed.
Example
At 2,000 RPM, 4 teeth, and 0.002 inch chip load, the feed rate is 16 IPM.
Sources & methodology
Last updated .
Frequently asked questions
How is feed rate calculated?
Feed rate = RPM × number of teeth × chip load (feed per tooth). It is the distance the table travels per minute. Feed per revolution is simply teeth × chip load.
What is chip load?
Chip load (feed per tooth) is how far each cutting edge advances per revolution. It comes from your tool and material; too low rubs and dulls the tool, too high overloads it.
Is my data stored?
No. Everything is calculated locally in your browser.
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