How do I convert a note name to its frequency?

Type a note name like A3 or C4 into the note field. The tool gives you the exact frequency, octave, and MIDI note number using equal temperament at A4 equals 440 Hz.

How do I find what note a frequency belongs to?

Enter any frequency from 20 to 20000 Hz. The tool shows the nearest musical note, how many cents off you are, and the harmonic series above that frequency.

What are useful harmonics of a note?

The harmonics table shows the second through eighth harmonic for any note you look up. Use it when you are sweeping an EQ and want to target specific overtone frequencies instead of guessing.

Studio utility

Note Frequency Converter

Convert notes to Hertz, convert Hertz back to the nearest note, and keep a quick harmonic reference open while you tune or sweep EQ.

Note name

Frequency in Hertz

Note

Frequency

Octave

MIDI note

Nearest note

Deviation

Harmonic	Frequency	Note

How the math works

Equal temperament maps every semitone with the same ratio. This tool uses A4 = 440 Hz, converts MIDI note numbers into Hertz, then works back from any frequency to the nearest equal-temperament note.

When you would use it

Check whether a kick or 808 fundamental is landing near the root of the track.
Translate a ringing EQ frequency into a note before deciding whether it is musical or distracting.
Match drum tuning targets and resonances without opening a separate chart.

Use this when you need to match a kick fundamental, check a ringing resonance, or translate a tuner reading into a note fast.

FAQ

Why does this matter in a mix?

Because many problem frequencies and sweet spots line up with musical notes, especially on drums, bass, and tuned samples.

Does this replace a spectrum analyzer?

No. It gives you the note relationship quickly, then you still make the final move by ear and with a meter.

Which reference pitch does it use?

A4 = 440 Hz in standard equal temperament.