What is feed rate in milling?

Feed rate (vf) is the linear speed at which the milling cutter advances into the workpiece, measured in mm/min. It equals feed per tooth × number of teeth × spindle RPM.

How do I calculate feed per tooth?

Feed per tooth fz = vf / (z × n), where vf is table feed rate in mm/min, z is number of cutting teeth, and n is spindle RPM.

What is a typical feed per tooth for steel?

For carbide end mills in mild steel, typical fz is 0.05–0.15 mm/tooth depending on tool diameter, depth of cut, and rigidity.

What is the difference between feed rate and feed per revolution?

Feed per revolution f = fz × z (mm/rev), which is the tool advance per full spindle rotation. Feed rate vf = f × n (mm/min) is the advance per unit time.

Does the number of flutes affect feed rate?

Yes. More flutes allow a higher table feed rate at the same feed per tooth and RPM. However, chip evacuation may limit flute count in some materials.

Free Engineering Tool #207

Feed Rate Calculator

Calculate the table feed rate (vf) for milling from feed per tooth, number of teeth, and spindle RPM. Also shows feed per revolution.

vf = fz × z × n Milling Auto-Calc

Results

Table Feed Rate (vf)

—

Feed per Revolution (f)

—

Material Removal Indicator

—

Table Feed Rate

vf — table feed rate (mm/min)
fz — feed per tooth (mm/tooth)
z — number of cutting teeth
n — spindle speed (RPM)

Feed per Revolution

Example — 4-flute end mill

Given: fz = 0.10 mm/tooth, z = 4, n = 1000 RPM

vf = 0.10 × 4 × 1000 = 400 mm/min

f = 0.10 × 4 = 0.40 mm/rev

Feed Rate Calculator | vf = fz × z × n | Free Online Tool

Published by Nikolai Shelkovenko on February 15, 2026 February 15, 2026

Results

Table Feed Rate

Feed per Revolution