4698.64Hz
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4.699 kHzFrequency at A4 = 440 Hz
110MIDI note number
–Piano key (of 88)
7.3 cmWavelength in air
About D8
D8 has a frequency of 4.699 kHz in standard tuning, where A4 is fixed at 440 Hz. It is MIDI note 110, outside the range of a standard piano.
In equal temperament every semitone multiplies the frequency by the twelfth root of two (≈1.05946), so D8 is 41 semitones above A4: f = 440 × 2^((110 − 69) / 12) = 4,698.64 Hz. The number in the name is the octave in scientific pitch notation, which starts each octave on C.
D8 frequency in different tunings
| Tuning reference | D8 frequency |
|---|---|
| A4 = 440 Hz (ISO 16 standard) | 4.699 kHz |
| A4 = 442 Hz (many European orchestras) | 4.72 kHz |
| A4 = 443 Hz (Berlin, Vienna) | 4.731 kHz |
| A4 = 435 Hz (French diapason normal, 1859) | 4.645 kHz |
| A4 = 432 Hz (alternative tuning) | 4.613 kHz |
| A4 = 415 Hz (Baroque pitch) | 4.432 kHz |
| C4 = 256 Hz (scientific pitch) | 4.598 kHz |
Intervals from D8
| Interval | Note | Frequency | Ratio (just) |
|---|---|---|---|
| Minor second | D♯8 | 4.978 kHz | 16:15 |
| Major second | E8 | 5.274 kHz | 9:8 |
| Minor third | F8 | 5.588 kHz | 6:5 |
| Major third | F♯8 | 5.92 kHz | 5:4 |
| Perfect fourth | G8 | 6.272 kHz | 4:3 |
| Tritone | G♯8 | 6.645 kHz | 45:32 |
| Perfect fifth | A8 | 7.04 kHz | 3:2 |
| Minor sixth | A♯8 | 7.459 kHz | 8:5 |
| Major sixth | B8 | 7.902 kHz | 5:3 |
| Minor seventh | C9 | 8.372 kHz | 9:5 |
| Major seventh | C♯9 | 8.87 kHz | 15:8 |
| Octave | D9 | 9.397 kHz | 2:1 |
Frequently asked questions
What is the frequency of D8?
D8 is 4.699 kHz when A4 = 440 Hz (4.613 kHz if A4 = 432 Hz).
What MIDI number is D8?
D8 is MIDI note number 110.
Is D8 on a piano?
No – a standard 88-key piano runs from A0 to C8, so D8 is outside its range.