X Audio Bitrate Calculator for Windows
Five audio calculators in one small portable app - bitrate, file size, storage capacity, uncompressed WAV size and a reference table.
Just need a quick answer? Use the online audio bitrate calculator - same sums, nothing to download.
From download to answer in three steps
Download and open
Run X-Audio-Bitrate-Calculator.exe. It is one portable file, so there is nothing to install and nothing to remove later.
Enter what you know
Pick a tab and a format, type the duration and add your size limit or bitrate. Preset buttons fill in common sizes for you.
Copy the result
The answer updates as you type. Click Copy, then use that bitrate in your encoder or converter.
What's new in version 1.1
Enter a storage size and a bitrate to see how many hours and tracks fit. Presets cover a CD, a DVD and 16 to 128 GB.
Exact WAV size and bitrate from sample rate, bit depth and channels, with an estimate for the same audio as FLAC.
MP3, AAC, Opus, Ogg Vorbis, WMA and AC-3 each have their own steps and limits, plus a five-level quality guide.
One duration box takes 3:30, 1:02:45, 45m or 90s. Add a track count, click a size preset and keep space for tags and cover art.
Flat tabs, clear cards and one result card with a Copy button. The window follows your display scale, remembers your settings and switches between 1024 and 1000 based units.
What X Audio Bitrate Calculator works out
Version 1.1 puts five audio calculators behind one row of tabs.
Each one updates as you type, so there is no Calculate button to press.
| Tab | You enter | You get |
|---|---|---|
| Find bitrate | Duration, track count, target size, space to keep for tags and cover art | The highest bitrate step that fits, the size it gives and a quality guide |
| Find file size | Bitrate and duration | File size, plus size per minute and per hour |
| Capacity | Storage size, bitrate and average track length | Hours of audio and number of tracks that fit |
| Uncompressed | Sample rate, bit depth, channels and duration | Exact WAV size and bitrate, with a FLAC estimate |
| Reference | Format and your own duration | A size table for every bitrate step of that format |
Every format has its own bitrate steps. MP3 stops at 320 kbps, Opus at 256 kbps and AC-3 goes up to 640 kbps for surround sound.
If your target needs more than the format allows, the app says so instead of showing a setting your encoder does not have.
Windows app or online calculator?
Windows app
- Works with no internet connection
- Remembers your format, values and last tab
- Small window that stays next to your encoder
- Keyboard shortcuts for tabs and copy
- Windows 10 and 11 only
Online calculator
- Nothing to download
- Works on any phone, tablet or computer
- Shareable link to a calculation
- Needs the page open
- Starts from the default values each visit
Both use the same formulas and give the same answers. Open the online calculator to try it now.
Keyboard shortcuts and settings
| Action | How |
|---|---|
| Switch calculator | Ctrl+1 to Ctrl+5 |
| Copy the current result | Ctrl+Shift+C, or click Copy on the result |
| Switch 1024 / 1000 units | Click the Units line at the bottom of the window |
| Fill in a common size | Click a preset such as CD 700 MB or 32 GB |
Your format, values, units and window size are saved when you close the app.
They are kept in %APPDATA%\xcodecpack\bitrate-calculator\settings.json. Delete that file to start fresh.
SHA-256 checksum
The program is not code-signed, so SmartScreen may call it unrecognised. The hash proves your file is byte-for-byte the one we built.
A5BC 277F C859 28C5 5E4A E509 10B6 25E8 A9C3 6941 7E1E 3DC5 F24F 15AD E010 94EBCheck it in PowerShell: Get-FileHash .\X-Audio-Bitrate-Calculator.exe
X Audio Bitrate Calculator - frequently asked questions
Is X Audio Bitrate Calculator free?
Do I need to install it?
Which Windows versions does it run on?
Does it need an internet connection?
Does it open or change my audio files?
Windows says the app is unrecognised. Is it safe?
Where are my settings stored?
%APPDATA%\xcodecpack\bitrate-calculator\settings.json. Nothing is written next to the .exe, so the app also runs from a read-only folder.