Turning Formula Interactive Calculator

Solve for any subject variable in bold by entering values in the boxes on the left side of the equation and clicking the "Calculate" button. The solution will appear in the box on the right side of the equation. To enter a value, click inside the boxes containing the "Enter" prompts.
Legend:
D - Workpiece diameter at machining point (in inches)
DOC - Depth of cut (in inches)
rad - nose radius of insert (in inches)
SURFACE FEET PER MINUTE (SFM)
Enter RPM Enter D
X X /12 =
REVOLUTIONS PER MINUTE (RPM)
Enter SFM Enter D
X (12/ ) / =
INCHES PER REVOLUTION FEED RATE (IPR)
Enter IPM Enter RPM
/ =
INCHES PER MINUTE FEED RATE (IPM)
Enter RPM Enter IPR
X =
CUBIC INCHES PER MINUTE METAL REMOVAL RATE (in³/min)
Enter SFM Enter IPR Enter DOC
X 12 X X =
Ra FINISH IN MICROINCHES ΅ in. (theoretical estimate only, invalid for round or wiper-style inserts)
Enter IPR Enter rad
( ² / ( 8 X ) ) X 333,333 =
RMS  ROOT MEAN SQUARE IN MICROINCHES ΅ in. (theoretical estimate only, invalid for round or wiper-style inserts)
Enter IPR Enter rad
( ( ² / ( 8 X ) ) / 3 ) X 370,000 =