G3
195.998Hz at concert pitch
Press to hear a pure sine tone at this pitch.
MIDI note
55
Piano key
35
Octave
3
Frequency
195.998 Hz
Period
5.1021 ms
Wavelength
1.75 m
Pitch class
G
Notation
SPN
MIDI is the note number synths and software pass around (0–127). Pitch class is the note without its octave — all the Gs share one.
At other reference pitches
| Reference (A4) | G3 frequency | Where you meet it |
|---|---|---|
| 432 Hz | 192.434 Hz | the alternative-tuning circle |
| 440 Hzstandard | 195.998 Hz | the ISO 16 standard — concert pitch |
| 442 Hz | 196.889 Hz | many European orchestras tune a touch sharp |
| 443 Hz | 197.334 Hz | some sharper continental orchestras |
Every row is G3 — only the A4 you tune to changes. A frequency scales straight with the reference: G3 at 432 Hz is the 440 Hz value times 432⁄440.
Move around
Every G
Chords with G in them
G appears in each of these — see the whole chord grid.