Oddrealm - Piano

This list of frequencies is for a theoretical ideal piano. On an actual piano the ratio between semitones is slightly larger, especially at the high and low ends, where string thickness causesinharmonicity due to the nonzero force required to bend stee lpiano wire in the absence of tension. This effect is sometimes known as stretched octaves, and the pattern ofdeviation is called the Railsback curve.

The following equation will give the frequency F of the nth key, as shown in the table:

$F(n) = 440\ (\sqrt[12]{2}\,)^{n-49}$

Piano Keys With Octaves Numbered

An 88-key piano, with the octaves numbered and Middle C (cyan) and A440 (yellow) highlighted.

Key number	Helmholtz name	Scientific name	Frequency (Hz)	Corresponding Open Strings
Key number	Helmholtz name	Scientific name	Frequency (Hz)	Violin	Viola	Cello	Bass	Guitar
88	c′′′′′ 5-line octave	C8 Eighth octave	4186.01
87	b′′′′	B7	3951.07
86	a♯′′′′/b♭′′′′	A♯7/B♭7	3729.31
85	a′′′′	A7	3520.00
84	g♯′′′′/a♭′′′′	G♯7/A♭7	3322.44
83	g′′′′	G7	3135.96
82	f♯′′′′/g♭′′′′	F♯7/G♭7	2959.96
81	f′′′′	F7	2793.83
80	e′′′′	E7	2637.02
79	d♯′′′′/e♭′′′′	D♯7/E♭7	2489.02
78	d′′′′	D7	2349.32
77	c♯′′′′/d♭′′′′	C♯7/D♭7	2217.46
76	c′′′′ 4-line octave	C7 Double high C	2093.00
75	b′′′	B6	1975.53
74	a♯′′′/b♭′′′	A♯6/B♭6	1864.66
73	a′′′	A6	1760.00
72	g♯′′′/a♭′′′	G♯6/A♭6	1661.22
71	g′′′	G6	1567.98
70	f♯′′′/g♭′′′	F♯6/G♭6	1479.98
69	f′′′	F6	1396.91
68	e′′′	E6	1318.51
67	d♯′′′/e♭′′′	D♯6/E♭6	1244.51
66	d′′′	D6	1174.66
65	c♯′′′/d♭′′′	C♯6/D♭6	1108.73
64	c′′′ 3-line octave	C6 Soprano C	1046.50
63	b′′	B5	987.767
62	a♯′′/b♭′′	A♯5/B♭5	932.328
61	a′′	A5	880.000
60	g♯′′/a♭′′	G♯5/A♭5	830.609
59	g′′	G5	783.991
58	f♯′′/g♭′′	F♯5/G♭5	739.989
57	f′′	F5	698.456
56	e′′	E5	659.255	E
55	d♯′′/e♭′′	D♯5/E♭5	622.254
54	d′′	D5	587.330
53	c♯′′/d♭′′	C♯5/D♭5	554.365
52	c′′ 2-line octave	C5 Tenor C	523.251
51	b′	B4	493.883
50	a♯′/b♭′	A♯4/B♭4	466.164
49	a′	A4 A440	440.000	A	A
48	g♯′/a♭′	G♯4/A♭4	415.305
47	g′	G4	391.995
46	f♯′/g♭′	F♯4/G♭4	369.994
45	f′	F4	349.228
44	e′	E4	329.628					High E
43	d♯′/e♭′	D♯4/E♭4	311.127
42	d′	D4	293.665	D	D
41	c♯′/d♭′	C♯4/D♭4	277.183
40	c′ 1-line octave	C4 Middle C	261.626
39	b	B3	246.942					B
38	a♯/b♭	A♯3/B♭3	233.082
37	a	A3	220.000			A
36	g♯/a♭	G♯3/A♭3	207.652
35	g	G3	195.998	G	G			G
34	f♯/g♭	F♯3/G♭3	184.997
33	f	F3	174.614
32	e	E3	164.814
31	d♯/e♭	D♯3/E♭3	155.563
30	d	D3	146.832			D		D
29	c♯/d♭	C♯3/D♭3	138.591
28	c small octave	C3 Low C	130.813		C
27	B	B2	123.471
26	A♯/B♭	A♯2/B♭2	116.541
25	A	A2	110.000					A
24	G♯/A♭	G♯2/A♭2	103.826
23	G	G2	97.9989			G	G
22	F♯/G♭	F♯2/G♭2	92.4986
21	F	F2	87.3071
20	E	E2	82.4069					Low E
19	D♯/E♭	D♯2/E♭2	77.7817
18	D	D2	73.4162				D
17	C♯/D♭	C♯2/D♭2	69.2957
16	C great octave	C2 Deep C	65.4064			C
15	Bˌ	B1	61.7354
14	A♯ˌ/B♭ˌ	A♯1/B♭1	58.2705
13	Aˌ	A1	55.0000				A
12	G♯ˌ/A♭ˌ	G♯1/A♭1	51.9131
11	Gˌ	G1	48.9994
10	F♯ˌ/G♭ˌ	F♯1/G♭1	46.2493
9	Fˌ	F1	43.6535
8	Eˌ	E1	41.2034				E
7	D♯ˌ/E♭ˌ	D♯1/E♭1	38.8909
6	Dˌ	D1	36.7081
5	C♯ˌ/D♭ˌ	C♯1/D♭1	34.6478
4	Cˌ contra-octave	C1 Pedal C	32.7032
3	Bˌˌ	B0	30.8677				B
2	A♯ˌˌ/B♭ˌˌ	A♯0/B♭0	29.1352
1	Aˌˌ sub-contra-octave	A0 Double Pedal A	27.5000

Ana
11.16.2011, 1:59 pm PST
somebody can tell me how i do B/D# ; A/C#; E/B; E/C#; E/G#; and AM7/B

Begginers
11.06.2011, 6:05 am PST
So hard, I can't seem to find a right music sheet for me to play! I need scores!!

oneway
10.06.2011, 2:08 pm PST
2beornot2be

I can't say
6.17.2011, 5:21 pm PST
seriously, make ALL SONGS a possibility

matii
4.30.2011, 11:28 am PST
gracias !! es de mucha ayudaa !!!

btrex
3.29.2011, 5:56 pm PST
let's just say, drop those geocities and add new ones.

Jack
3.22.2011, 4:25 pm PST
Any word on how long this has taken?

Ghost
12.19.2010, 4:45 am PST
well dis is crap

oddrealm
10.14.2010, 8:40 pm PST
since geocities has gone down, a lot of the sites don't appear to work anymore

music
10.10.2010, 7:39 pm PST
i wish to have glitter in the air- music sheets for free

spyroxokami
9.18.2010, 8:12 pm PST
la di da

mini scott
9.17.2010, 5:20 pm PST
where's, the music sheets

n00b
9.11.2010, 2:51 am PST
um, are there any FREE music sheets here?

Nicole from Cali
6.24.2010, 8:15 pm PST
What's up people?

Jared
4.23.2010, 9:31 pm PST
@oddrealm's twitter Glee's entertaining but I don't know if it lives up to everyone's hype.

Jonathon Pinder
4.21.2010, 2:09 pm PST
Excellent redesign of the site but yo some of the functions ain't functionin'. like recommending a youtube vid

Meg Reese
4.15.2010, 8:25 am PST
OMG! Totally loved the Rowan Atkinson vid in the tweets. hahahahaha

Dmitri
4.12.2010, 9:16 pm PST
Just wanted to say hey, and ummm, does anyone know where to get "At My Most Beauitful" by REM?

music lover
4.11.2010, 8:23 pm PST
site should be done sometimes this week!

impatient
4.09.2010, 11:13 am PST
when's the site gonna be complete?

Tonya P.
4.05.2010, 5:14 pm PST
Really really cool stuff

Jason
4.05.2010, 12:21 pm PST
Like the new site design!

music lover
4.01.2010, 9:39 pm PST
just post whatever you like pertaining to music or the piano. Keep it clean please!