Inverse second

It is dimensionally equivalent to:

• hertz (Hz), historically known as cycles per second – the SI unit for frequency and rotational frequency
• becquerel (Bq) – the SI unit for the rate of occurrence of aperiodic or stochastic radionuclide events
• baud (Bd) – the unit for symbol rate over a communication link
• bit per second (bit/s) – the unit of bit rate
• radian per second (rad⋅s⁻¹) - the SI unit for angular frequency and angular velocity

However, the special names and symbols above for s⁻¹ are recommend to be used in their domains of application, for clarity, as they are used for different kinds of quantity.

The inverse minute or reciprocal minute (min⁻¹), also called per minute, is 60⁻¹ s⁻¹, as 1 min = 60 s; it is used in quantities of type "counts per minute", such as:

• Actions per minute
• Beats per minute
• Counts per minute
• Revolutions per minute (rpm)
• Words per minute

Inverse square second (s⁻²) is involved in the units of linear acceleration, angular acceleration, and rotational acceleration.