Frequency in hertz (semitones above or below middle C)

Octave→
Note↓

0

1

2

3

4

5

6

7

8

9

C

16.352 (?48)

32.703 (?36)

65.406 (?24)

130.81 (?12)

261.63 (0)

523.25 (+12)

1046.5 (+24)

2093.0 (+36)

4186.0 (+48)

8372.0 (+60)

C?/D?

17.324 (?47)

34.648 (?35)

69.296 (?23)

138.59 (?11)

277.18 (+1)

554.37 (+13)

1108.7 (+25)

2217.5 (+37)

4434.9 (+49)

8869.8 (+61)

D

18.354 (?46)

36.708 (?34)

73.416 (?22)

146.83 (?10)

293.66 (+2)

587.33 (+14)

1174.7 (+26)

2349.3 (+38)

4698.6 (+50)

9397.3 (+62)

D?/E?

19.445 (?45)

38.891 (?33)

77.782 (?21)

155.56 (?9)

311.13 (+3)

622.25 (+15)

1244.5 (+27)

2489.0 (+39)

4978.0 (+51)

9956.1 (+63)

E

20.602 (?44)

41.203 (?32)

82.407 (?20)

164.81 (?8)

329.63 (+4)

659.26 (+16)

1318.5 (+28)

2637.0 (+40)

5274.0 (+52)

10548 (+64)

F

21.827 (?43)

43.654 (?31)

87.307 (?19)

174.61 (?7)

349.23 (+5)

698.46 (+17)

1396.9 (+29)

2793.8 (+41)

5587.7 (+53)

11175 (+65)

F?/G?

23.125 (?42)

46.249 (?30)

92.499 (?18)

185.00 (?6)

369.99 (+6)

739.99 (+18)

1480.0 (+30)

2960.0 (+42)

5919.9 (+54)

11840 (+66)

G

24.500 (?41)

48.999 (?29)

97.999 (?17)

196.00 (?5)

392.00 (+7)

783.99 (+19)

1568.0 (+31)

3136.0 (+43)

6271.9 (+55)

12544 (+67)

G?/A?

25.957 (?40)

51.913 (?28)

103.83 (?16)

207.65 (?4)

415.30 (+8)

830.61 (+20)

1661.2 (+32)

3322.4 (+44)

6644.9 (+56)

13290 (+68)

A

27.500 (?39)

55.000 (?27)

110.00 (?15)

220.00 (?3)

440.00 (+9)

880.00 (+21)

1760.0 (+33)

3520.0 (+45)

7040.0 (+57)

14080 (+69)

A?/B?

29.135 (?38)

58.270 (?26)

116.54 (?14)

233.08 (?2)

466.16 (+10)

932.33 (+22)

1864.7 (+34)

3729.3 (+46)

7458.6 (+58)

14917 (+70)

B

30.868 (?37)

61.735 (?25)

123.47 (?13)

246.94 (?1)

493.88 (+11)

987.77 (+23)

1975.5 (+35)

3951.1 (+47)

7902.1(+59)

15804 (+71)