Video file size calculator
FrameCutter's free video file size calculator works out how big a video is from its length and bitrate, and how long it takes to upload at your connection speed.
75 MBfile size
30 sto upload
Size = bitrate × length. Your phone or export settings show the real bitrate; audio adds a little more.
Last updated 23 October 2026
File size
From length × bitrate.
Upload time
At the speed you type.
No guessing
It's the same maths your editor uses.
Questions
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