A5 — 880.00 Hz
A5 (MIDI 81) vibrates 880.00 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
A5 at different reference pitches
| Reference (A4) | A5 frequency | Used for |
|---|---|---|
| 415 Hz | 830.00 Hz | Baroque pitch |
| 432 Hz | 864.00 Hz | “Verdi” pitch |
| 440 Hz | 880.00 Hz | Standard concert pitch |
| 442 Hz | 884.00 Hz | European orchestras |
| 444 Hz | 888.00 Hz | European orchestras |
Physical properties
- Period: one cycle every 1.14 ms
- Wavelength in air: ≈ 39.0 cm (at 20 °C, 343 m/s)
- MIDI note number: 81
- Octave up: A6 = 1760.00 Hz · Octave down: 440.00 Hz