Media File Size Calculations
From MusicTechWiki
These calculations will help you to estimate the size of audio files.
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 |
| 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 |
PCM File Size Calculations
Here are some file size calculations for common PCM audio settings. PCM stands for Pulse Code Modulation and commonly uses the file extensions .wav or .cda. There are quite a few other combinations of bits per sample and samples per second which may be used. We have included calculations for the most common mono (one channel) and stereo (two channel) settings.
Mono
Formula:
Bits per sample x samples per second = bits per second / 8 = Bytes per second x 60 seconds = Bytes per minute x 60 minutes = Bytes per hour of mono.
| Settings | Bitrate | File size per second | File size per minute | File size per hour |
|---|---|---|---|---|
| 16 bit, 44.1 KHz | 705.6 Kbps | 88.2 KB | 5.292 MB | 317.52 MB |
| 16 bit, 48 KHz | 768 Kbps | 96 KB | 5.750 MB | 345.60 MB |
| 24 bit, 48KHz | 1,152 Kbps | 144 KB | 8.640 MB | 518.40 MB |
| 24 bit, 96KHz | 2,304 Kbps | 288 KB | 17.280 MB | 1.0368 GB |
Stereo
Formula:
Bits per sample x samples per second = bits per second x 2 channels = bits per second of stereo / 8 = Bytes per second of stereo x 60 seconds = Bytes per minute of stereo x 60 minutes = Bytes per hour of stereo.
| Settings | Bitrate | File size per second | File size per minute | File size per hour |
|---|---|---|---|---|
| 16 bit, 44.1 KHz | 1,411.2 Kbps | 176.4 KB | 10.584 MB | 635.04 MB |
| 16 bit, 48 KHz | 1,536 Kbps | 192 KB | 11.520 MB | 691.2 MB |
| 24 bit, 48KHz | 2,304 Kbps | 288 KB | 17.28 MB | 1.036 GB |
| 24 bit, 96KHz | 4,608 Kbps | 576 KB | 34.56 MB | 2.0736 GB |