Audio File Size Calculator – Music and Podcast Storage
Calculate audio file size from duration, sample rate, bit depth, and format.
About This Calculator
Calculate audio file size from duration, sample rate, bit depth, and format. Use the calculator above for instant results.
Worked Examples
- 128 x 3600 / 8 / 1024 = 56.25 MB
Answer: 56.25 MB
- 320 x 2700 / 8 / 1024 = 105.5 MB
Answer: 105.5 MB
- 44100 x 16 x 2 x 3600 / 8 / 1M = 603 MB
Answer: ~603 MB WAV
Who Uses This Calculator?
Plan audio storage for recordings.
Estimate episode file sizes.
Storage for music servers.
Estimate offline music storage.
Common Mistakes to Avoid
❌ MP3 quality vs file size
128 kbps: good for podcasts. 192 kbps: standard music. 320 kbps: highest MP3 quality. FLAC is lossless but 5-10x larger than 320k MP3.
❌ Sample rate confusion
CD quality: 44.1 kHz/16-bit. Hi-res: 96-192 kHz/24-bit. Higher isn't always audibly better — it's mainly for professionals.
Frequently Asked Questions
Good audio bitrate?
Streaming: 128-320 kbps. Podcast: 64-128 kbps. Music: 192-320 kbps for MP3. FLAC/ALAC for lossless.
Spotify audio quality?
Free: 128 kbps AAC. Premium: 320 kbps OGG Vorbis. Spotify HiFi (announced): lossless FLAC.
How many songs per GB?
At 320 kbps, 4-min song = ~9.6 MB. About 100 songs/GB. At FLAC (~35 MB): about 28 songs/GB.