Audio File Size Calculator
File size from bitrate and duration.
Enter your values
ⓘ Live results
Results
- File size
- 42.2 MB
- Per minute
- 0.94 MB
- Hours per GB
- 18.2
- Bitrate used
- 128 kbps
Quick answer
Audio file size is bitrate multiplied by duration, converted to bytes.
MB = bitrate (kbps) × seconds ÷ 8192
How to use the Audio File Size Calculator
- 1Enter the recording length.
- 2Choose the export bitrate.
- 3Read the resulting file size.
Worked example
Using the values the calculator loads with:
Inputs
- Duration45 min
- Bitrate128 kbps standard
- Channels2
Results
- File size42.2 MB
- Per minute0.94 MB
- Hours per GB18.2
- Bitrate used128 kbps
Frequently asked questions
What bitrate for podcasts?
96–128 kbps mono is plenty for spoken word.
Is 320 kbps worth it?
Only for music; most listeners cannot hear the difference above 192.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.