How do I calculate the size of an uncompressed WAV file?

Multiply sample rate × bit depth × channels × duration in seconds, then divide by 8 to get bytes. Most of these calculators do this automatically and show the result in MB or GB.

Can these calculators estimate compressed MP3 or AAC file sizes?

Yes. For compressed formats, file size equals bitrate (in kbps) × duration (in seconds) ÷ 8. Several tools include preset bitrates for common codecs.

What is the difference between binary and decimal units in these tools?

Binary units use powers of 1024 (MiB, GiB), while decimal units use powers of 1000 (MB, GB). The same number of bytes will show a larger value in decimal units than in binary.

Do I need to know my sample rate and bit depth to use these calculators?

If you are calculating uncompressed audio size, yes. For compressed formats like MP3, you only need the bitrate and duration.

Which tool is best for quick storage estimates without extra features?

Number Convert is the simplest option—it focuses on data storage unit conversion with a clean interface and no format presets, so you can get a size number fast.

Data Storage Conversion5 options compared

Audio Size Calculator

Estimates the storage size of uncompressed audio files, specifically PCM/WAV formats. Users input essential technical parameters including sample rate, bit depth, number of channels, and the desired duration to determine the resulting file size. The calculator provides both the total estimated size and the associated data rate for the given specifications. It offers flexibility through various...

Editors’ Top PickBased on community votes

Number Convert

numberconvert.com

Convert data storage units with this free audio size calculator. Perfect for computing and digital storage calculations.

Open Number Convert Read review →

Other OptionsRanked by votes

02
02
Starlight Tools
starlighttools.org
An audio file size calculator that estimates uncompressed PCM/WAV storage from sample rate, bit depth, channels, and ...
Open site View details
03
03
Electronic Music Mall
electronicmusicmall.com
Audio file size calculator that lets you enter duration, sample rate, bit depth, and channels to estimate sizes for d...
Open site View details
04
04
Fuss-Free Browser Apps
fussfreebrowserapps.com
Calculates audio file sizes from duration and bitrate, with presets for common codecs. It also supports uncompressed ...
Open site View details
05
05
Sound Devices
sounddevices.com
Audio recording storage calculator that determines required storage from time values or recording time from available...
Open site View details

Side by side

Audio Size Calculator options compared

Tool	Best for	Strengths	Limitations
Number Convert numberconvert.com	Quick storage unit conversion	Simple interface for data storage math Handles binary and decimal units Free and no-frills	Focused only on storage conversion No format or preset options
Starlight Tools starlighttools.org	Full audio production planning	Presets for common sample rates and bit depths Shows data rate and duration estimates Supports compressed and uncompressed formats	More features than needed if you only want storage math Slightly more complex interface
Electronic Music Mall electronicmusicmall.com	Music production storage checks	Tailored for music producers and engineers Explains both uncompressed and compressed size math Shows size in MB and bytes	Fewer unit options than Number Convert Community votes lowest among the group
Fuss-Free Browser Apps fussfreebrowserapps.com	Quick bitrate-based size estimates	Includes codec presets for common audio types Supports uncompressed WAV/PCM with sample rate and channels Very lightweight and fast to use	Ads on the page may distract Fewer unit options; binary/decimal not emphasized
Sound Devices sounddevices.com	Professional recording storage planning	Designed for digital audio recording space planning Determines storage from time or time from available storage	Page could not be fetched; notes are thin Limited public info to judge full capabilities

Buyer's guide

How to choose a audio size calculator

When picking an audio size calculator, first decide whether you need only storage math or also format-specific help. If you just want to know how many megabytes a WAV file will take given sample rate, bit depth, channels, and duration, choose a tool that lets you enter those four values and returns size in your preferred units. If you also need to estimate compressed file sizes, compare storage across formats, or see how long a given drive will record, look for presets and duration-versus-storage reverse calculations. The key differences worth caring about are whether the tool handles both binary and decimal units, includes format presets, and shows data rate alongside total size.

Questions

Audio Size Calculator FAQ

How do I calculate the size of an uncompressed WAV file?: Multiply sample rate × bit depth × channels × duration in seconds, then divide by 8 to get bytes. Most of these calculators do this automatically and show the result in MB or GB.
Can these calculators estimate compressed MP3 or AAC file sizes?: Yes. For compressed formats, file size equals bitrate (in kbps) × duration (in seconds) ÷ 8. Several tools include preset bitrates for common codecs.
What is the difference between binary and decimal units in these tools?: Binary units use powers of 1024 (MiB, GiB), while decimal units use powers of 1000 (MB, GB). The same number of bytes will show a larger value in decimal units than in binary.
Do I need to know my sample rate and bit depth to use these calculators?: If you are calculating uncompressed audio size, yes. For compressed formats like MP3, you only need the bitrate and duration.
Which tool is best for quick storage estimates without extra features?: Number Convert is the simplest option—it focuses on data storage unit conversion with a clean interface and no format presets, so you can get a size number fast.

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