Video File Size Calculator
Estimate video file size from bitrate and length.
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Copy or share after running the tool. Saved tools and settings stay in this browser.
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Estimate video file size
Video exports can become large quickly, especially at high bitrate or long duration. Enter video bitrate, audio bitrate and duration to estimate final file size. It is useful for upload planning, encoding settings, storage estimates and client delivery notes.
Bitrate-based size estimate
The estimate uses bitrate multiplied by duration. Variable bitrate encoding, subtitles and container overhead can make the final file slightly different.
Frequently asked questions
What bitrate unit should I use?
Enter video bitrate in Mbps and audio bitrate in kbps.
Does resolution matter?
Resolution affects the bitrate you choose, but file size comes from bitrate and duration.
Can this estimate streaming storage?
Yes. Use the bitrate of the stream or rendition you plan to store.