Audio File Size Calculator
Compressed Audio (MP3/AAC/OGG)
Calculate file size for compressed audio formats
Uncompressed Audio (WAV/AIFF)
Calculate file size for uncompressed audio
Format Comparison
Compare file sizes across audio formats
Formula
Compressed: Size (MB) = Bitrate (kbps) × Duration (s) / 8 / 1024 | Uncompressed: Size = Sample Rate × Bit Depth/8 × Channels × Duration
Frequently Asked Questions
How big is a 3-minute MP3?
At 192 kbps (good quality), a 3-minute MP3 is about 4.2 MB. At 320 kbps (maximum quality), it's about 7 MB. At 128 kbps (standard), it's about 2.8 MB.
WAV vs FLAC - which is better?
Both are lossless (identical quality). WAV is uncompressed and universally compatible. FLAC compresses to about 50-60% of WAV size with no quality loss but requires compatible players.
What audio bitrate should I use?
For music: 256-320 kbps (MP3/AAC) or lossless (FLAC/WAV). For podcasts/speech: 64-128 kbps is sufficient. For professional production: 24-bit/48kHz WAV minimum.
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