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Free Audio File Size Calculator Online
Calculate audio file size from format, bitrate, sample rate, channels, and duration. Plan storage needs, estimate bandwidth costs, and optimize your audio pipeline.
No sign-up required for this free tool. All processing happens in your browser.
Estimated File Size
4.6 MB
~0.0 hours per GB
Format Comparison
Features
Everything you need in a free audio file size calculator — no compromises.
Multi-Format Calculation
Calculate sizes for WAV, MP3, OGG, FLAC, AAC, and more. See how format choice affects file size.
Bitrate Comparison
Compare file sizes across different bitrates (64–320 kbps) to find the best quality-to-size ratio.
Batch Estimation
Calculate total storage for multiple files — estimate an entire podcast season or music library.
Bandwidth Calculator
Estimate streaming bandwidth and CDN costs based on file size and expected listener count.
Storage Planning
Plan storage needs for your audio library. See how many hours of audio fit in 1GB, 10GB, or 100GB.
Quality Comparison Table
Side-by-side comparison of file sizes at different quality settings with perceptual quality ratings.
How to use Audio File Size Calculator
Get started in seconds — no installation, no sign-up.
Select audio format
Choose from WAV, MP3, OGG, FLAC, AAC, or other common formats.
Set parameters
Enter bitrate, sample rate (44.1/48/96 kHz), channels (mono/stereo), and duration.
View results
See calculated file size with comparisons across formats and quality settings.
Plan your storage
Use batch mode to estimate total storage for your entire audio library or project.
Use cases for Audio File Size Calculator
About Audio File Size Calculator
Understanding audio file sizes is crucial for anyone working with audio content. Whether you're planning podcast hosting costs, optimizing web audio, or estimating storage for a music library — knowing how format, bitrate, and duration affect file size helps you make informed decisions.
Why use our free audio file size calculator?
Our calculator goes beyond simple math. It compares multiple formats side-by-side, estimates bandwidth costs, and helps you plan storage for entire projects. The quality comparison table shows you exactly what you're trading when you choose a smaller file size.
Pro tips
- 1For podcasts, 128kbps mono MP3 is the sweet spot — about 1MB per minute with excellent speech quality.
- 2Use FLAC instead of WAV for archival — same quality at 50–60% of the file size.
- 3For web audio, OGG at 96kbps sounds as good as MP3 at 128kbps but is 25% smaller.
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More free tools
Explore our other free tools for audio editing, podcast production, and content creation.
Audio File Size Calculator — frequently asked questions
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