Cutting Speed Calculator

Convert between surface speed and RPM, plus feed rate calculation.

Formula: V=πDn/1000 ↔ n=1000V/(πD)

① RPM → Surface Speed

V = - m/min

② Surface Speed → RPM

n = - RPM

③ Feed Rate

Feed/rev f=-mm/rev | Feed rate Vf=-mm/min

Recommended Cutting Speeds

OperationMaterialToolV (m/min)
TurningCarbon SteelCarbide120–180
TurningCast IronCarbide80–130
TurningCarbon SteelHSS30–50
MillingCarbon SteelCarbide60–120
MillingAluminumCarbide200–400
DrillingCarbon SteelHSS20–40
DrillingAluminumHSS40–80