Video File Size Estimator
Estimate video file size from bitrate and length.
How big will that video be?
File size follows from bitrate and duration: multiply bitrate by seconds and divide by eight for bytes. Ten minutes at 8 Mbps lands near 600 MB.
It is the planning tool before an export or upload: checking whether a chosen bitrate and length will fit a platform's size cap, or how much storage a batch of clips needs.
Audio and overhead
The audio track and container add a little on top, so budget slightly more. Your figures never leave the browser.
Frequently Asked Questions
How does the video file size estimator work?
Video size combines video and audio bitrates, multiplies by duration, and converts bits to megabytes. Ten minutes at 8 Mbps plus 192 kbps is about 614 MB.
When should I use this tool?
Use it for upload planning, export settings, client delivery, storage estimates, and bandwidth budgets.
What is the main limitation?
Codec efficiency affects quality, not the arithmetic size produced by a target bitrate.
Is this converter private?
Yes. It runs entirely in your browser, so your values are not uploaded or stored.
More free browser utilities for conversion, formatting, and technical cleanup.