10 MB is the maximum file size.  Please refer to the table below to calculate audio lengths based off bit rate.


MP3 File Size Calculations

Formula: Kbps = bits per second / 8 = Bytes per second x 60 seconds = Bytes per minute x 60 minutes = Bytes per hour


Bitrate

File size
per second

File size
per minute

File size
per hour

 8 Kbps

1 KB

60 KB

3.6 MB

16 Kbps

2 KB

120 KB

7.2 MB

32 Kbps

4 KB

240 KB

14.4 MB

40 Kbps

5 KB

300 KB

18.0 MB

48 Kbps

6 KB

360 KB

21.6 MB

56 Kbps

7 KB

420 KB

25.2 MB

64 Kbps

8 KB

480 KB

28.8 MB

80 Kbps

10 KB

600 KB

36.0 MB

96 Kbps

12 KB

720 KB

43.2 MB

112 Kbps

14 KB

840 KB

50.4 MB

128 Kbps

16 KB

960 KB

57.6 MB

160 Kbps

20 KB

1.20 MB

72.0 MB

192 Kbps

24 KB

1.44 MB

86.4 MB

224 Kbps

28 KB

1.68 MB

100.8 MB

256 Kbps

32 KB

1.92 MB

115.2 MB

320 Kbps

40 KB

2.40 MB

144.0 MB