2093.0Hz
Start with your device volume low. Very low tones may be inaudible on phone or laptop speakers; very high tones can be uncomfortable on headphones.
2.093 kHzFrequency at A4 = 440 Hz
96MIDI note number
76Piano key (of 88)
16.4 cmWavelength in air
About C7
C7 has a frequency of 2.093 kHz in standard tuning, where A4 is fixed at 440 Hz. It is MIDI note 96 and key number 76 on an 88-key piano.
C7 is near the top of the flute's range.
In equal temperament every semitone multiplies the frequency by the twelfth root of two (≈1.05946), so C7 is 27 semitones above A4: f = 440 × 2^((96 − 69) / 12) = 2,093.00 Hz. The number in the name is the octave in scientific pitch notation, which starts each octave on C.
C7 frequency in different tunings
| Tuning reference | C7 frequency |
|---|---|
| A4 = 440 Hz (ISO 16 standard) | 2.093 kHz |
| A4 = 442 Hz (many European orchestras) | 2.103 kHz |
| A4 = 443 Hz (Berlin, Vienna) | 2.107 kHz |
| A4 = 435 Hz (French diapason normal, 1859) | 2.069 kHz |
| A4 = 432 Hz (alternative tuning) | 2.055 kHz |
| A4 = 415 Hz (Baroque pitch) | 1.974 kHz |
| C4 = 256 Hz (scientific pitch) | 2.048 kHz |
Intervals from C7
| Interval | Note | Frequency | Ratio (just) |
|---|---|---|---|
| Minor second | C♯7 | 2.217 kHz | 16:15 |
| Major second | D7 | 2.349 kHz | 9:8 |
| Minor third | D♯7 | 2.489 kHz | 6:5 |
| Major third | E7 | 2.637 kHz | 5:4 |
| Perfect fourth | F7 | 2.794 kHz | 4:3 |
| Tritone | F♯7 | 2.96 kHz | 45:32 |
| Perfect fifth | G7 | 3.136 kHz | 3:2 |
| Minor sixth | G♯7 | 3.322 kHz | 8:5 |
| Major sixth | A7 | 3.52 kHz | 5:3 |
| Minor seventh | A♯7 | 3.729 kHz | 9:5 |
| Major seventh | B7 | 3.951 kHz | 15:8 |
| Octave | C8 | 4.186 kHz | 2:1 |
Instruments and voices that can play C7
Frequently asked questions
What is the frequency of C7?
C7 is 2.093 kHz when A4 = 440 Hz (2.055 kHz if A4 = 432 Hz).
What MIDI number is C7?
C7 is MIDI note number 96.
Is C7 on a piano?
Yes – it is key 76 of 88.