Audio Storage
Calculate the disk space a recording takes at a given bitrate and length.
About Audio Storage
Bitrate is a flow of bits each second, so the file size multiplies that flow by the duration and divides the kilobits into megabytes. Session backups and archive drives fill fast at high bitrates, so size planning prevents running out mid-recording.
Formula
Audio Storage
Size (MB) = duration x bitrate x 60 / 8000
- kbps
- Kilobits per second of the encoded stream
Worked example
With the default values below, Audio Storage returns File Size of 144.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Durationminimum 1 min
- 60 min
- Bitrateaccepts 32–3,200 kbps
- 320 kbps
Results
- File Size
- 144.0 MB
- File Size
- 0.141 GB
- Per Hour
- 144.0 MB
Step by step
- 1Values used
- 2Audio Storage
- 3File Size= 144.0 MB
- 4File Size= 0.141 GB
- 5Per Hour= 144.0 MB
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Audio Storage calculated?
Size (MB) = duration x bitrate x 60 / 8000 Bitrate is a flow of bits each second, so the file size multiplies that flow by the duration and divides the kilobits into megabytes.
Why does Audio Storage matter?
Session backups and archive drives fill fast at high bitrates, so size planning prevents running out mid-recording.
What values do I need to enter?
This calculator takes 2 inputs: Duration, Bitrate. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.