Audio File Size Calculator
Calculate the file size of uncompressed (WAV) or compressed (MP3/AAC) audio from duration, sample rate, bit depth and channels, free online.
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Uncompressed PCM size = sample rate × bit depth × channels × seconds ÷ 8. CD quality (44.1 kHz, 16-bit, stereo) is 10.1 MB per minute. Compressed formats use a fixed bitrate: size = bitrate × seconds ÷ 8 (320 kbps MP3 ≈ 2.4 MB per minute). FLAC typically saves ~40–50%.