Piano notes: every key named, with sound
A playable 88-key keyboard with note names, octave numbers and frequencies, plus how to find any note.
A piano has 88 keys: 52 white and 36 black, from A0 (27.5 Hz) to C8 (4,186 Hz). The white keys repeat the seven note names C D E F G A B; each black key is a sharp or flat (C♯/D♭...). Middle C is C4, about 261.63 Hz, and the A above it (A4) is tuned to 440 Hz.
Play the full 88-key piano
Scroll sideways; every C is labelled with its octave number. Tap any key to hear it.
How to find notes on the piano
- Black keys come in alternating groups of two and three.
- C is the white key just left of a group of two black keys; F is just left of a group of three.
- From C, the white keys go up D, E, F, G, A, B, then C again one octave higher.
- E–F and B–C are the only neighbouring white keys with no black key between them: they are half steps.
Quick test: name the key
Five keys highlighted on one octave. Name each one.
Score: / 5 (your score updates as you answer)
Piano key frequencies: all 88 notes
Equal temperament with A4 = 440 Hz. Each key is 21/12 (about 1.0595) times the frequency of the key below.
Show the table of all 88 keys
| Key | Note | Frequency |
|---|---|---|
| 88 | C8 | 4186.01 Hz |
| 87 | B7 | 3951.07 Hz |
| 86 | A♯7 / B♭7 | 3729.31 Hz |
| 85 | A7 | 3520.00 Hz |
| 84 | G♯7 / A♭7 | 3322.44 Hz |
| 83 | G7 | 3135.96 Hz |
| 82 | F♯7 / G♭7 | 2959.96 Hz |
| 81 | F7 | 2793.83 Hz |
| 80 | E7 | 2637.02 Hz |
| 79 | D♯7 / E♭7 | 2489.02 Hz |
| 78 | D7 | 2349.32 Hz |
| 77 | C♯7 / D♭7 | 2217.46 Hz |
| 76 | C7 | 2093.00 Hz |
| 75 | B6 | 1975.53 Hz |
| 74 | A♯6 / B♭6 | 1864.66 Hz |
| 73 | A6 | 1760.00 Hz |
| 72 | G♯6 / A♭6 | 1661.22 Hz |
| 71 | G6 | 1567.98 Hz |
| 70 | F♯6 / G♭6 | 1479.98 Hz |
| 69 | F6 | 1396.91 Hz |
| 68 | E6 | 1318.51 Hz |
| 67 | D♯6 / E♭6 | 1244.51 Hz |
| 66 | D6 | 1174.66 Hz |
| 65 | C♯6 / D♭6 | 1108.73 Hz |
| 64 | C6 | 1046.50 Hz |
| 63 | B5 | 987.77 Hz |
| 62 | A♯5 / B♭5 | 932.33 Hz |
| 61 | A5 | 880.00 Hz |
| 60 | G♯5 / A♭5 | 830.61 Hz |
| 59 | G5 | 783.99 Hz |
| 58 | F♯5 / G♭5 | 739.99 Hz |
| 57 | F5 | 698.46 Hz |
| 56 | E5 | 659.26 Hz |
| 55 | D♯5 / E♭5 | 622.25 Hz |
| 54 | D5 | 587.33 Hz |
| 53 | C♯5 / D♭5 | 554.37 Hz |
| 52 | C5 | 523.25 Hz |
| 51 | B4 | 493.88 Hz |
| 50 | A♯4 / B♭4 | 466.16 Hz |
| 49 | A4 | 440.00 Hz |
| 48 | G♯4 / A♭4 | 415.30 Hz |
| 47 | G4 | 392.00 Hz |
| 46 | F♯4 / G♭4 | 369.99 Hz |
| 45 | F4 | 349.23 Hz |
| 44 | E4 | 329.63 Hz |
| 43 | D♯4 / E♭4 | 311.13 Hz |
| 42 | D4 | 293.66 Hz |
| 41 | C♯4 / D♭4 | 277.18 Hz |
| 40 | C4 (middle C) | 261.63 Hz |
| 39 | B3 | 246.94 Hz |
| 38 | A♯3 / B♭3 | 233.08 Hz |
| 37 | A3 | 220.00 Hz |
| 36 | G♯3 / A♭3 | 207.65 Hz |
| 35 | G3 | 196.00 Hz |
| 34 | F♯3 / G♭3 | 185.00 Hz |
| 33 | F3 | 174.61 Hz |
| 32 | E3 | 164.81 Hz |
| 31 | D♯3 / E♭3 | 155.56 Hz |
| 30 | D3 | 146.83 Hz |
| 29 | C♯3 / D♭3 | 138.59 Hz |
| 28 | C3 | 130.81 Hz |
| 27 | B2 | 123.47 Hz |
| 26 | A♯2 / B♭2 | 116.54 Hz |
| 25 | A2 | 110.00 Hz |
| 24 | G♯2 / A♭2 | 103.83 Hz |
| 23 | G2 | 98.00 Hz |
| 22 | F♯2 / G♭2 | 92.50 Hz |
| 21 | F2 | 87.31 Hz |
| 20 | E2 | 82.41 Hz |
| 19 | D♯2 / E♭2 | 77.78 Hz |
| 18 | D2 | 73.42 Hz |
| 17 | C♯2 / D♭2 | 69.30 Hz |
| 16 | C2 | 65.41 Hz |
| 15 | B1 | 61.74 Hz |
| 14 | A♯1 / B♭1 | 58.27 Hz |
| 13 | A1 | 55.00 Hz |
| 12 | G♯1 / A♭1 | 51.91 Hz |
| 11 | G1 | 49.00 Hz |
| 10 | F♯1 / G♭1 | 46.25 Hz |
| 9 | F1 | 43.65 Hz |
| 8 | E1 | 41.20 Hz |
| 7 | D♯1 / E♭1 | 38.89 Hz |
| 6 | D1 | 36.71 Hz |
| 5 | C♯1 / D♭1 | 34.65 Hz |
| 4 | C1 | 32.70 Hz |
| 3 | B0 | 30.87 Hz |
| 2 | A♯0 / B♭0 | 29.14 Hz |
| 1 | A0 | 27.50 Hz |
Frequently asked questions
How many keys does a piano have?
A standard piano has 88 keys: 52 white and 36 black, from A0 (27.5 Hz) to C8 (4,186 Hz), just over seven octaves.
Which key is middle C?
Middle C (C4) is the C nearest the middle of the keyboard, the 40th key from the left on an 88-key piano, at about 261.63 Hz.
How do you find C on a piano?
Black keys come in groups of two and three. C is the white key just to the left of each group of two black keys.
What are the black keys called?
Each black key has two names: the sharp of the white key to its left and the flat of the white key to its right. The key between C and D is C sharp or D flat.
What do the numbers after piano notes mean?
They are octave numbers (scientific pitch notation). The number goes up at every C: B3 is followed by C4, middle C. A4 is the A above middle C, tuned to 440 Hz.