MRR · cm³/min · in³/min
Metal Removal Rate Calculator
Metal removal rate (Q) is the common currency of machining productivity — and the input to power and force calculations. Compute it for milling, turning and drilling in metric or imperial.
Milling / general (W × D × feed)
Q = w · d · vf / 1000Turning (Vc × ap × fn)
Q = Vc · ap · fnDrilling (area × feed)
Q = (π/4)·D²·vfFormulas used
Milling: Q (cm³/min) = width × depth × feed (mm/min) ÷ 1000 · imperial: Q (in³/min) = W × D × IPM
Turning: Q = Vc (m/min) × ap (mm) × fn (mm/rev) — directly in cm³/min
Drilling: Q = (π/4) × D² × vf
Frequently asked questions
What is metal removal rate?
The volume of material removed per unit time, in cm³/min or in³/min. It directly determines required spindle power and is the best single measure of machining productivity.
How do I convert cm³/min to in³/min?
Divide by 16.387. 100 cm³/min ≈ 6.10 in³/min.