Audio Duration and Size
Audio duration from file size and bitrate, or the size from duration.
🎵Audio Duration and Size
All processing happens locallyWhat this tool does
Audio Duration and Size is a photography calculator applying optical and exposure formulas., optical formulas cover depth of field, field of view, exposure and print size for use on location.
thin-lens approximation; macro and tilt-shift deviate, and quoted focal lengths are often equivalents.
How to use it
- Paste or type your content into the input field at the top, or press the sample button to load demo data.
- Adjust the options below the input, such as output format, separators, letter case or precision.
- Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
- When the result looks right, use the copy button in the corner, or download it as a local file.
Tips and notes
Clean up stray spaces and line breaks before pasting for more accurate results.
FAQ
Cameras use manufacturer-specific circles of confusion; this assumes 0.03 mm on full frame, which you can change.
Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.
No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.
Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.
Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.