Revolutions per Hour to Cycles per Second Converter

Revolutions per hour (rph) is a unit of rotational frequency representing the number of complete rotations around a fixed axis in one hour. It's used for very slow rotational systems and astronomical observations.

RPH became useful for describing very slow rotational systems such as astronomical observations, large industrial equipment, and systems where rotational speeds are extremely low. It provided appropriate scaling for applications where RPM would result in very small decimal numbers.

RPH is used for astronomical observations (planetary rotation), very slow industrial processes, large rotating equipment, and systems with extremely low rotational speeds. It's found in astronomical calculations and specifications for very slow rotating machinery.

Cycles per second (cps) is a unit of frequency representing the number of complete cycles of a periodic phenomenon occurring in one second. It's essentially equivalent to hertz but predates the modern SI terminology.

Cycles per second was the original term used to describe frequency before the adoption of the hertz in 1960. It was widely used in early electronics, radio, and physics literature, providing a descriptive term for periodic phenomena.

Cycles per second is rarely used in modern applications, having been replaced by hertz in scientific and technical contexts. It may still appear in historical literature, educational materials, or informal descriptions of frequency.