Hz to Note Converter

Convert raw frequencies into standard scientific pitch notation using A4 = 440Hz equal temperament.

Frequency (Hz)

Closest Note

Detune (Cents)

-32 ¢

Manual Calculation

n = 12 * log2(f / 440)

Where 'n' is the number of half-steps from A4 (440Hz).

Tuning Standards

By default, this tool uses A4 = 440Hz, the international ISO 16 standard for concert pitch. If you input 432Hz, you will see it represents a slightly detuned A4 (roughly -32 cents flat). There is no empirical evidence that 432Hz possesses biological advantages over 440Hz; they are simply distinct mathematical tunings. Read more about the 432Hz myth.