Audio File Size Calculator
Estimate audio file size from bitrate and length.
Keep or share the finished result
Copy or share after running the tool. Saved tools and settings stay in this browser.
What would you like to do next?
Estimate audio file size
Audio file size depends mainly on bitrate and duration. Enter audio bitrate and length to estimate MB and GB totals for podcasts, music exports, voice recordings, audiobooks or course lessons. It is useful when planning storage, uploads or distribution limits.
Bitrate and duration
Compressed audio formats such as MP3 and AAC often target a bitrate. Lossless audio and variable bitrate exports can vary from this estimate.
Frequently asked questions
What bitrate should I enter for MP3?
Common MP3 exports use values such as 128, 192, 256 or 320 kbps.
Does this work for podcasts?
Yes. Enter the podcast bitrate and total minutes.
Why can the final file differ?
Metadata, artwork and variable bitrate encoding can change the final size.