TURNING CALCULATOR

Calculate common turning parameters in metric or imperial units. Enter values in the white fields; results update automatically.

Unit System: Metric Imperial

Cutting Speed

Vc = π × D × n ÷ 1000

Spindle Speed n [RPM]Machined Diameter D [mm]

Cutting Speed

0 m/min

Spindle Speed

n = Vc × 1000 ÷ (π × D)

Cutting Speed Vc [m/min]Machined Diameter D [mm]

Spindle Speed

0 RPM

Feed Rate

Vf = n × fn

Spindle Speed n [RPM]Feed per Revolution fn [mm/rev]

Feed Rate

0 mm/min

Material Removal Rate (MRR)

Q = Vc × ap × fn

Cutting Speed Vc [m/min]Depth of Cut ap [mm]Feed per Revolution fn [mm/rev]

Material Removal Rate

0 cm³/min

Theoretical Surface Finish (Approx.)

Ra ≈ f² ÷ (32 × r)

Feed per Revolution f [mm/rev]Insert Nose Radius r [mm]

Approximate Theoretical Ra

0 µm

Machining Time

Tc = L ÷ (fn × n)

Machined Length L [mm]Feed per Revolution fn [mm/rev]Spindle Speed n [RPM]

Machining Time

0 min

Engineering note: These are mathematical reference calculations, not recommended cutting data. Actual speeds, feeds and tool performance depend on workpiece material, tool material/grade, geometry, machine rigidity, holder, coolant and application conditions. The surface-finish value is a simplified theoretical estimate for standard nose-radius turning and does not represent wiper geometry, vibration, built-up edge or runout.