Speeds and Feeds Calculator
Free calculate spindle speed (rpm), feed rate, chip load, and cutting parameters for cnc machining operations.
Input Parameters
Leave blank to use recommended value
Leave blank to use recommended value
Results
Enter parameters to calculate speeds and feeds
Speeds and Feeds Formulas
Spindle Speed (RPM)
RPM = (SFM × 12) / (π × D)
Where:
- • SFM = Surface Feet per Minute
- • D = Tool Diameter (inches)
Feed Rate
Feed = RPM × Flutes × Chip Load
Material Removal Rate
MRR = Feed × Depth × Width