G7
3,135.963Hz at concert pitch
Press to hear a pure sine tone at this pitch.
MIDI note
103
Piano key
83
Octave
7
Frequency
3,135.963 Hz
Period
0.3189 ms
Wavelength
0.1094 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) | G7 frequency | Where you meet it |
|---|---|---|
| 432 Hz | 3,078.946 Hz | the alternative-tuning circle |
| 440 Hzstandard | 3,135.963 Hz | the ISO 16 standard — concert pitch |
| 442 Hz | 3,150.218 Hz | many European orchestras tune a touch sharp |
| 443 Hz | 3,157.345 Hz | some sharper continental orchestras |
Every row is G7 — only the A4 you tune to changes. A frequency scales straight with the reference: G7 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.