Samples per second
In PCM audio, a higher sample rate means that more samples are stored for each second. With the other settings unchanged, that increases the amount of data.
This audio file size calculator estimates how much storage an audio recording needs from its duration and format settings. Calculate uncompressed PCM audio from sample rate, bit depth and channel count, or estimate bitrate-based audio in seconds. Visit Ronter Sound or explore more Audio Tools for Musicians.
Enter the duration and choose the way your audio is stored. Results update immediately as you change the values.
Audio storage depends on how the sound is represented. For uncompressed PCM audio, every additional sample, bit and channel contributes directly to the amount of data. The calculator therefore combines sample rate, bit depth, channel count and duration.
Bitrate-based audio uses a simpler estimate. If you already know the bitrate, the required data is determined by that rate and the total playing time.
These calculations are useful when planning recording time, checking storage requirements, comparing format settings, or estimating the size of audio before an export. For more hands-on audio experiments, visit the Interactive Online Audio Mixer or try the Mixer Console Simulator.
Duration is only one part of the calculation. The recording format determines how much data is required for every second of audio.
In PCM audio, a higher sample rate means that more samples are stored for each second. With the other settings unchanged, that increases the amount of data.
Bit depth determines how many bits are allocated to each PCM sample. Moving from one bit depth to another therefore changes the calculated storage requirement.
A stereo PCM recording stores two channels instead of one. More channels mean more sample data for every moment of the recording.
An audio file size tool answers a practical question before the file even exists: approximately how much data will this audio require? Instead of creating an export just to inspect its size, you can enter the expected duration and format values and compare different possibilities immediately.
This can be helpful before a long recording session, when choosing settings for an archive, or when comparing mono and stereo files. Musicians preparing for a session can also read the First Time Recording Studio Guide and the guide to how long vocal recording takes.
In the PCM mode, the calculator uses four values: sample rate, bit depth, number of channels and duration. Sample rate tells the calculation how many samples occur each second. Bit depth determines the number of bits assigned to every sample, while the channel value determines how many independent streams of samples are stored.
Consider the relationship rather than only one setting. If duration, bit depth and channel count remain unchanged, increasing sample rate increases the calculated size. If sample rate stays fixed but stereo is changed to mono, the channel multiplier changes from two to one.
When comparing sample rates, keep the remaining values unchanged if you want to see the effect of sample rate alone. The preset buttons make this easier: select a format, note the result, then change only the sample rate.
Recording individual instruments can involve different project requirements. The Instrument Recording Studio page covers the recording side of that workflow, while this calculator remains useful for estimating the resulting raw data.
In uncompressed PCM, bit depth is a direct multiplier. A 24-bit stream contains one and a half times as many audio-data bits per sample as a 16-bit stream when sample rate, duration and channel count are identical.
The calculator performs that relationship directly rather than using a fixed lookup table, so changing the duration or any format parameter immediately produces a new estimate.
Channel count has a straightforward effect on raw PCM data. One channel produces one stream of samples; stereo produces two. With all other parameters equal, two-channel PCM therefore requires twice the raw sample data of mono PCM.
That distinction can matter with voice, music and other recorded material. For related recording workflows, explore Voiceover Recording, Music Recording, and Audio Content Recording Services.
Sometimes sample rate and bit depth are not the values you need for a storage estimate. If the audio is described by a bitrate, switch the calculator to Bitrate mode and enter that value directly.
The calculation multiplies bitrate by duration and converts the resulting number of bits to bytes. This is useful for a quick constant-rate estimate. Actual encoded file sizes can differ because file containers can add metadata and headers, and variable-bitrate encoding does not necessarily use one constant rate throughout the complete file.
Storage values are often displayed using two different unit systems. A decimal megabyte contains 1,000,000 bytes, while a binary mebibyte contains 1,048,576 bytes. The underlying byte count has not changed; only the unit used to describe it is different.
| Unit | Bytes | System |
|---|---|---|
| KB | 1,000 | Decimal |
| MB | 1,000,000 | Decimal |
| GB | 1,000,000,000 | Decimal |
| KiB | 1,024 | Binary |
| MiB | 1,048,576 | Binary |
| GiB | 1,073,741,824 | Binary |
Duration scales the result directly. A recording that lasts twice as long requires twice the raw PCM data when its format is unchanged. This makes the calculator useful for estimating longer sessions before deciding how much available storage is comfortable for the project.
Artists organizing a complete recording day may also find the Recording Studio Travel Guide useful. There are dedicated planning pages for artists traveling from New York and artists traveling from North Jersey.
This calculator returns the size represented by the channel count you enter. For a collection of separate tracks, calculate the relevant files and combine their sizes, or use the result for one track as a starting point when the tracks share the same duration and format.
Real sessions may contain tracks of different lengths, bounced versions, alternate takes and additional project data, so a simple audio-data calculation should not be treated as the complete storage requirement for an entire production folder.
The PCM calculation estimates audio sample data itself. A WAV or another container also includes structural information and can include metadata, so its exact file size may be slightly different from the raw data value.
Likewise, bitrate mode is a mathematical estimate based on the bitrate entered. Variable-bitrate files, embedded artwork, metadata and container overhead can make the finished file differ from a simple bitrate-times-duration calculation.
Storage calculations are most useful when they are made before they become a problem. If you know approximately how long the material will be and which format you intend to use, you can compare settings before recording begins.
For broader production planning, explore Mixing and Mastering or Song Demo Production. Musicians comparing different recording approaches can also browse Music Genre Recording Services.
Once you have estimated the storage requirement, you can continue experimenting with other Audio Tools for Recording, Mixing, and Ear Training or return to the complete Audio Tools for Musicians collection.
If the project moves beyond calculation into recording and production, see Audio Recording, Mixing & Mastering Services and Audio Engineer.
Enter the recording length, choose PCM parameters or a bitrate, and compare the estimated file size instantly.
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