The revolutions per minute (abbreviated rpm, RPM or r/min) is a unit of frequency, commonly used to measure rotational speed. Examples: The word unit means any of several things: Physical unit, a fundamental quantity of measurement in science or engineering Units (computer program), a popular program that does unit conversion. ... Sine waves of various frequencies; the lower waves have higher frequencies than those above. ... Rotational speed (sometimes called speed of revolution) indicates for example how fast the motor is running. ...

• Gramophone (phonograph) records typically rotate at 16, 33⅓, 45, or 78 rpm (CAV).
• Audio CD rotation rates vary from about 500 rpm when reading the innermost CD track, to 180 rpm when reading tracks near the outer edge (CLV).
• An automobile's engine typically makes between 700 and 7000 rpm.
• Piston aircraft engines can rotate with 8000 rpm.
• A racing car engine's limits are much higher, as high as 19,000 rpm in Formula One.
• Gas turbine engines rotate at tens of thousands of rpm.
• A computer's hard drive can range from 3000-7200 RPM on IDE types and from 10,000 to 25,000 on SATA and SCSI drives.
• A 52x CD-ROM drive can rotate a CD as fast as 10,350 RPM.
• Zippe-type centrifuge spins at 90,000 RPM.

Standards bodies generally recommend the symbol r/min, which better follows the general principles for forming unit symbols. Manufacturers put records inside protective and decorative cardboard jackets and an inner paper sleeve to protect the grooves from dust and scratches. ... Cercle des Amateurs de Vin Constant Angular Velocity -- as opposed to Constant Linear Velocity (CLV) Computer Aided Verification Consumer Affairs Victoria This page concerning a three letter acronym is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... CD re-directs here; see Cd for other meanings of CD. Image of a compact disc (pencil included for scale) A compact disc (or CD) is an optical disc used to store digital data, originally developed for storing digital audio. ... Cercle des Amateurs de Vin Constant Angular Velocity -- as opposed to Constant Linear Velocity (CLV) Computer Aided Verification Consumer Affairs Victoria This page concerning a three letter acronym is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... A small variety of cars, the most popular kind of automobile. ... An engine is something that produces some effect from a given input. ... The term aircraft engine, for the purposes of this article, refers to aircraft reciprocating, or rotary, internal combustion engines as opposed to jet engines or turboprops. ... Formula One, abbreviated to F1 and also known as Grand Prix racing, is the highest class of single-seat open-wheel formula auto racing. ... This machine has a single-stage radial compressor and turbine, a recuperator, and foil bearings. ... Typical hard drives of the mid-1990s. ... ATA cables: 40 wire ribbon cable top, 80 wire ribbon cable bottom Advanced Technology Attachment (ATA) is a standard interface for connecting storage devices such as hard disks and CD-ROM drives inside personal computers. ... A 15-pin serial ATA power connector. ... SCSI stands for Small Computer System Interface, and is a standard interface and command set for transferring data between devices on a computer bus. ... The CD-ROM (an abbreviation for Compact Disc Read-Only Memory (ROM)) is a non-volatile optical data storage medium using the same physical format as audio compact discs, readable by a computer with a CD-ROM drive. ... The Zippe-type centrifuge is a device designed to collect Uranium-235. ...

The SI unit of frequency is the hertz (Hz): The International System of Units (abbreviated SI from the French phrase, Système International dUnités) is the most widely used system of units. ... Sine waves of various frequencies; the lower waves have higher frequencies than those above. ... The hertz (symbol Hz) is the SI unit of frequency. ...

1 rpm = 1 r/min = 1/60 Hz

The SI unit of angular speed is the radian per second: The International System of Units (abbreviated SI from the French phrase, Système International dUnités) is the most widely used system of units. ... Angular frequency is a measure of how fast an object is rotating In physics (specifically mechanics and electrical engineering), angular frequency ω (also called angular speed) is a scalar measure of rotation rate. ... In mathematics and physics, the radian is a unit of angle measure. ... The second (symbol s) is a unit for time, and one of seven SI base units. ...

1 rpm = 1 r/min = 2π rad/min = 2π/60 rad/s = 0.10471976 rad/s