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Calcimator

Feed Rate Calculator

Calculate feed rate (IPM) from chip load, number of flutes, and spindle RPM for CNC milling operations.

Inputs

in/tooth
RPM

Results

Feed Rate

72 IPM

Feed Rate (metric)1,828.8 mm/min
Feed per Revolution0.01 in/rev
How to Use This Calculator
  1. Enter the chip load (IPT or mm/tooth) from your cutter manufacturer's recommendations.
  2. Set the number of flutes on the end mill or drill.
  3. Enter the target spindle speed (RPM).
  4. Review the calculated feed rate in IPM and mm/min, and feed per revolution.
  5. Adjust chip load or RPM to keep feed rate within your machine's capability.

How the result changes with Chip Load

Chip LoadFeed Rate
0.01122.2 IPM
0.02422.4 IPM
0.03780 IPM
0.051,080 IPM

What each input means

Chip Load
Recommended chip load per tooth from tooling manufacturer.
Number of Flutes
Number of cutting edges on the end mill.
Spindle Speed
Calculated or programmed spindle speed.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Chip Load = 0.003, Number of Flutes = 4, Spindle Speed = 6000 = 3 input(s) provided
  2. Calculate Feed Rate
    Feed Rate
    72 = 72
  3. Calculate Feed Rate
    Feed Rate
    1828.8 = 1828.8
  4. Calculate Feed per Revolution
    Feed per Revolution
    0.012 = 0.012

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