Milling Speed Feed and Removal Rate Calculator
Relate entered cutting speed, cutter diameter, tooth count and chip load to spindle/feed speed and removal rate.
YOUR CALCULATION
Result
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Calculation steps
Work through one step at a time or reveal the complete calculation. The steps use your current inputs.
How to calculate
Convert cutting speed and dimensions to SI, calculate spindle revolutions, multiply by teeth and feed per tooth for feed speed, then multiply by the rectangular cut cross-section.
RPM=cutting speed×60/(π×diameter); feed=RPM×teeth×feed/tooth; removal=width×depth×feed
Worked example
At cutting speed 10π m/min, diameter 10 mm, four teeth and 0.05 mm/tooth, RPM is 1000 and feed is 200 mm/min. Width 5 mm and depth 2 mm remove 2 cm³/min.
Assumptions and input details
All cutting parameters are entered assumptions, not material/tool recommendations. Ideal constant engagement, no runout, radial chip thinning, tool wear, acceleration or machine limits. Radial width cannot exceed the entered effective diameter in this one-pass model. Removal rate is geometric, not measured production capacity.
References: Sandvik Coromant: metric milling formulas
Unit definitions
Unit selection is independent of language. Each selector contains only units for its physical quantity. Calculations use defined base units internally.
Choose from 23 length definitions, including explicitly labelled regional measures. Area conversions square the length factor; geometric volumes cube it.
Regional measures are not interchangeable merely because their names look similar. This is a documented selection, not a claim to include every historical unit.
NIST measurement tables · Japanese traditional units · Mainland China and Hong Kong unit distinctions
Using this calculator
Can I enter my own problem?
Yes. Replace the example values with your own inputs. The result, calculation steps, tables and applicable diagrams update from those inputs. Blank or invalid values clear the result; example values are never silently substituted for missing inputs.
Are the results exact?
Results use floating-point arithmetic and displayed rounding. Read the formula, assumptions and any stated data precision before interpreting the result.
Is my input uploaded?
The calculation runs in your browser. No account, file upload or external AI service is required. Inputs are not saved between page reloads.
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