RPM Calculator

Your details

RPM
Distance from the axis of rotation to the point whose surface speed you want.
m
Angular velocity
314.159rad/s
Frequency50Hz
Surface speed94.248
Angular velocity18,000deg/s
rad/s314.159
deg/s (scaled)18,000

3,000 RPM equals 314.16 rad/s (18,000 deg/s).

  • Each revolution sweeps 2pi radians, so 50 rev/s becomes 314.16 rad/s.
  • Angular velocity is identical everywhere on the spinning object; surface speed grows with radius.
  • At this radius, the rim travels 94.25 m/s.

Next stepDouble the radius and the surface speed doubles, while RPM and rad/s stay unchanged.

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