Hz SI derived
Measures: Frequency — how often per second
Hertz
Once per second — the unit of repetition.
FrequencyHow it's defined
Defined as 1/s: one cycle, beat, or oscillation per second. Musical pitch, radio stations, screen refresh rates, and CPU clocks are all this unit at different magnitudes.
1 Hz = 1 cycle/s — exactconcert pitch A = 440 Hz — a convention, not a law
Convert — honestly
This unit has no convertible siblings on the map yet.
Where you meet it
- Mixii — track BPM is this unit ÷ 60 ↗ open mixii
- The "120 Hz" on a phone spec sheet
Other ways to measure frequency
On this map, it stands alone for its quantity.
Source
This page is an authored summary of the authoritative definition — checkable one click away.
BIPM — The International System of Units (SI Brochure, 9th ed.)