CUTTING SPEED AND DIAMETER → RPM
Turning RPM calculator
Calculate theoretical spindle RPM from metric m/min and mm, or imperial SFM and inches, with an optional user-entered RPM comparison limit.
Open RPM calculator ↗TURNMATE / LOCAL BROWSER CALCULATIONS
CNC turning calculators
Convert theoretical spindle RPM and feed per minute. Calculations run in this browser without uploading inputs; results are unit-conversion references, not machine-ready cutting parameters.
FEED PER REVOLUTION × RPM → FEED PER MINUTE
Turning feed-rate converter
Convert mm/rev × RPM to mm/min, or in/rev × RPM to in/min.
Open feed calculator ↗Inputs and results do not replace tool-maker data for the material/insert, machine and workholding limits, or controller verification. Read the G96/G97 and speed-limit guide.