C0 to B8 · Hz and MIDI · tap to hear
Note frequency chart
Every note from C0 to B8 in Hz and MIDI. Tap one to hear it, or type a note or a frequency to find it.
How to use it
- Type a note (F#3, Bb2) or a frequency (261.6) in the box at the top: a note shows big with its Hz and MIDI number, and a frequency shows its nearest note and how many cents above or below it. Or tap any row of the table to hear that note.
- The table opens on C2 to C6, where voices live, and Show every note opens C0 to B8. Compare two notes, then tap a second row, for the distance in semitones and cents. More sets A4 (415 to 466 Hz), Do Re Mi or German names, sharps or flats, middle C called C3, and copying the table.
The full chart: every note from C0 to B8
Each note's frequency in equal temperament with A4 = 440 Hz, to two decimals, with its MIDI note number. A black key has two names, so both are given. For another A4, open the tool above with ?a4=432 in the address, or set it under More.
| Note | Frequency (Hz) | MIDI number |
|---|---|---|
| C0 | 16.35 | 12 |
| C♯0 / D♭0 | 17.32 | 13 |
| D0 | 18.35 | 14 |
| D♯0 / E♭0 | 19.45 | 15 |
| E0 | 20.60 | 16 |
| F0 | 21.83 | 17 |
| F♯0 / G♭0 | 23.12 | 18 |
| G0 | 24.50 | 19 |
| G♯0 / A♭0 | 25.96 | 20 |
| A0 | 27.50 | 21 |
| A♯0 / B♭0 | 29.14 | 22 |
| B0 | 30.87 | 23 |
| C1 | 32.70 | 24 |
| C♯1 / D♭1 | 34.65 | 25 |
| D1 | 36.71 | 26 |
| D♯1 / E♭1 | 38.89 | 27 |
| E1 | 41.20 | 28 |
| F1 | 43.65 | 29 |
| F♯1 / G♭1 | 46.25 | 30 |
| G1 | 49.00 | 31 |
| G♯1 / A♭1 | 51.91 | 32 |
| A1 | 55.00 | 33 |
| A♯1 / B♭1 | 58.27 | 34 |
| B1 | 61.74 | 35 |
| C2 | 65.41 | 36 |
| C♯2 / D♭2 | 69.30 | 37 |
| D2 | 73.42 | 38 |
| D♯2 / E♭2 | 77.78 | 39 |
| E2 | 82.41 | 40 |
| F2 | 87.31 | 41 |
| F♯2 / G♭2 | 92.50 | 42 |
| G2 | 98.00 | 43 |
| G♯2 / A♭2 | 103.83 | 44 |
| A2 | 110.00 | 45 |
| A♯2 / B♭2 | 116.54 | 46 |
| B2 | 123.47 | 47 |
| C3 | 130.81 | 48 |
| C♯3 / D♭3 | 138.59 | 49 |
| D3 | 146.83 | 50 |
| D♯3 / E♭3 | 155.56 | 51 |
| E3 | 164.81 | 52 |
| F3 | 174.61 | 53 |
| F♯3 / G♭3 | 185.00 | 54 |
| G3 | 196.00 | 55 |
| G♯3 / A♭3 | 207.65 | 56 |
| A3 | 220.00 | 57 |
| A♯3 / B♭3 | 233.08 | 58 |
| B3 | 246.94 | 59 |
| C4 | 261.63 | 60 |
| C♯4 / D♭4 | 277.18 | 61 |
| D4 | 293.66 | 62 |
| D♯4 / E♭4 | 311.13 | 63 |
| E4 | 329.63 | 64 |
| F4 | 349.23 | 65 |
| F♯4 / G♭4 | 369.99 | 66 |
| G4 | 392.00 | 67 |
| G♯4 / A♭4 | 415.30 | 68 |
| A4 | 440.00 | 69 |
| A♯4 / B♭4 | 466.16 | 70 |
| B4 | 493.88 | 71 |
| C5 | 523.25 | 72 |
| C♯5 / D♭5 | 554.37 | 73 |
| D5 | 587.33 | 74 |
| D♯5 / E♭5 | 622.25 | 75 |
| E5 | 659.26 | 76 |
| F5 | 698.46 | 77 |
| F♯5 / G♭5 | 739.99 | 78 |
| G5 | 783.99 | 79 |
| G♯5 / A♭5 | 830.61 | 80 |
| A5 | 880.00 | 81 |
| A♯5 / B♭5 | 932.33 | 82 |
| B5 | 987.77 | 83 |
| C6 | 1046.50 | 84 |
| C♯6 / D♭6 | 1108.73 | 85 |
| D6 | 1174.66 | 86 |
| D♯6 / E♭6 | 1244.51 | 87 |
| E6 | 1318.51 | 88 |
| F6 | 1396.91 | 89 |
| F♯6 / G♭6 | 1479.98 | 90 |
| G6 | 1567.98 | 91 |
| G♯6 / A♭6 | 1661.22 | 92 |
| A6 | 1760.00 | 93 |
| A♯6 / B♭6 | 1864.66 | 94 |
| B6 | 1975.53 | 95 |
| C7 | 2093.00 | 96 |
| C♯7 / D♭7 | 2217.46 | 97 |
| D7 | 2349.32 | 98 |
| D♯7 / E♭7 | 2489.02 | 99 |
| E7 | 2637.02 | 100 |
| F7 | 2793.83 | 101 |
| F♯7 / G♭7 | 2959.96 | 102 |
| G7 | 3135.96 | 103 |
| G♯7 / A♭7 | 3322.44 | 104 |
| A7 | 3520.00 | 105 |
| A♯7 / B♭7 | 3729.31 | 106 |
| B7 | 3951.07 | 107 |
| C8 | 4186.01 | 108 |
| C♯8 / D♭8 | 4434.92 | 109 |
| D8 | 4698.64 | 110 |
| D♯8 / E♭8 | 4978.03 | 111 |
| E8 | 5274.04 | 112 |
| F8 | 5587.65 | 113 |
| F♯8 / G♭8 | 5919.91 | 114 |
| G8 | 6271.93 | 115 |
| G♯8 / A♭8 | 6644.88 | 116 |
| A8 | 7040.00 | 117 |
| A♯8 / B♭8 | 7458.62 | 118 |
| B8 | 7902.13 | 119 |
How the frequencies are worked out
The chart is in equal temperament, the tuning of a piano: every semitone is the same step, a frequency ratio of the twelfth root of 2. Start from A4 and count semitones. E4 is 5 semitones below A4, so it's 440 × 2^(-5/12) = 329.63 Hz; A5 is 12 above, so it's 880 Hz.
Choirs and string players often tune chords pure instead, so a held major third sits about 14 cents below its equal-tempered note. The chart gives the piano's notes, the usual reference.
Each note plays as a pure tone. A phone's small speaker plays low pure tones quietly or not at all, below middle C especially, so use headphones for the low notes.
Middle C, octave numbers and MIDI
Scientific pitch notation names a note by its letter and its octave, and the octave number goes up at each C. So B3 is the note just below middle C (C4), and C5 is the C an octave above it. C0, at 16.35 Hz, is below most people's hearing as a note; B8, at 7902.13 Hz, is far above any piano.
MIDI numbers each semitone, with middle C at 60 and A4 at 69, whatever the software calls the octave. Add 12 for each octave up: C5 is 72, C3 is 48.
Concert pitch: 440, 442, 415 and 432
The chart follows whatever A4 you set, and every note moves with it. These are the A4s people use most, with middle C at each.
| A4 | Middle C | Against A440 | Who uses it |
|---|---|---|---|
| 440 Hz | 261.63 Hz | The standard | Concert pitch, the international standard (ISO 16) |
| 442 Hz | 262.81 Hz | 7.9 cents higher | Many orchestras |
| 443 Hz | 263.41 Hz | 11.8 cents higher | Some orchestras that tune higher still |
| 415 Hz | 246.76 Hz | 101.3 cents lower | Baroque music on period instruments, about a semitone low |
| 432 Hz | 256.87 Hz | 31.8 cents lower | An alternative tuning some people prefer |
| 466 Hz | 277.09 Hz | 99.4 cents higher | A high baroque church pitch, about a semitone up |
Voice ranges in Hz
The usual ranges of each voice type, as the vocal range test uses them, at A4 = 440. They overlap, and trained singers often reach beyond them.
| Voice type | Usual range | In Hz |
|---|---|---|
| Bass | E2 to E4 | 82.41 to 329.63 |
| Baritone | G2 to G4 | 98.00 to 392.00 |
| Tenor | C3 to A4 | 130.81 to 440.00 |
| Alto | F3 to D5 | 174.61 to 587.33 |
| Mezzo-soprano | A3 to F5 | 220.00 to 698.46 |
| Soprano | C4 to A5 | 261.63 to 880.00 |
Free tools by Stackapella
Those are the numbers. Now hear the notes fit together.
Stackapella teaches you to sing harmony one part at a time, right in your browser.
- A guide sings your partHear your line over the others, slow it down, then take your turn.
- Your notes light upEach note shows where you landed, and a hint when to go up or down.
- Record every part yourselfStack your takes in time until you're the whole choir.
- Every course free
- Open source
- No ads, no tracking
Questions
What frequency is middle C?
Middle C is 261.63 Hz when A4 is 440 Hz. It's C4 in scientific pitch notation and MIDI note 60. With A4 at 432 Hz it's 256.87 Hz, and at 442 Hz it's 262.81 Hz.
What note is 440 Hz?
A4, the A above middle C, MIDI note 69. It's concert pitch, the international standard (ISO 16) that tuners, pianos and most bands tune to.
What note is 432 Hz?
Against A440, 432 Hz is an A4 about 32 cents flat, roughly a third of a semitone low. Some musicians tune A4 to 432 Hz because they like its slightly darker sound; claims that it's more natural or healthier have no good evidence behind them. Set A4 to 432 under More, or open this page with ?a4=432 at the end of its address, and the whole chart follows for that visit.
How do you calculate a note's frequency?
f = 440 × 2^((n - 69) / 12), where n is the note's MIDI number and 440 is A4 in Hz. Each semitone multiplies the frequency by the twelfth root of 2, about 1.0595, so each octave doubles it. For middle C, n is 60: 440 × 2^(-9/12) = 261.63 Hz.
What is MIDI note 60?
Middle C: C4, 261.63 Hz at A4 = 440. MIDI numbers each note from 0 to 127, one per semitone, and A4 is 69.
What octave is middle C, and why does some software call it C3?
In scientific pitch notation, octaves start on C and middle C is C4. Some keyboards and music software call the same note C3, and a few call it C5. The note and its MIDI number, 60, are the same either way; only the label differs. The "call middle C C3" setting under More switches the chart to match your software.
What are the lowest and highest notes on a piano in Hz?
An 88-key piano runs from A0 at 27.50 Hz to C8 at 4186.01 Hz, with A4 at 440. Real pianos are often tuned a little wider than these exact numbers at the very top and bottom, which tuners call stretch tuning.
How do I turn a frequency into a note?
Type it in the box, as 261.6 or 440 Hz: it names the nearest note and how many cents above or below that note it is. The formula is n = 69 + 12 × log2(f / 440), rounded to the nearest whole number for the note.
What is a cent in music?
A hundredth of a semitone, so 1200 cents make an octave. Tuners and this chart use cents for the gap between a frequency and the nearest note: 50 cents is halfway to the next one.
What are the frequencies of a singer's range?
From about 82 Hz to 880 Hz across the usual voice types: E2, the bottom of a bass's range, to A5, the top of a soprano's. Trained voices go beyond both. The chart names where each voice type starts and ends, and your own range if the vocal range test saved it on this device.
More free tools
No account, no ads. Each one keeps working offline once you've opened it.
See all 17 tools