Free Online Audio Bitrate File Size Calculator
Plan podcast, voice note, audiobook, and music exports before rendering. Estimate how large an audio file will be at a selected bitrate, or calculate the bitrate needed to hit a target size.
Audio Bitrate File Size Calculator
Estimate audio file size from duration and bitrate, or estimate bitrate from a target upload size.
Estimated size: 28.13 MB
Duration30 min
Bitrate128 kbps
Target28.8 MB
Modesize
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Formula uses decimal duration and binary megabytes: minutes x 60 x kbps x 1000 / 8 / 1,048,576.