CNC Router Feed & Speed Calculator

Calculate optimal RPM, feed rate & chip load for your material & tooling

MaterialOFF

ToolingOFF

SpeedOFF

FeedOFF

Chip LoadOFF

SafetyOFF

Material

Tool Diameter

inches

Number of Flutes Surface Speed (SFM)

surface feet per minute

Chip Load per Tooth

inches per tooth (IPT)

Spindle RPM

—

Feed Rate

—

Material Removal

—

Feed / Min (effective)

—

Effective Chip Thickness

—

Depth of Cut

inches

Width of Cut (stepover)

inches

Spindle Efficiency

% motor efficiency

Estimated Power

—

HP required

// Spindle Speed
RPM = (SFM × 3.82) / D

// Feed Rate
IPM = RPM × Flutes × IPT

// Material Removal Rate
MRR = DOC × WOC × IPM