Video file size (minutes × bitrate)
File size in megabytes is roughly duration in seconds times total megabits per second, divided by eight. Container overhead is ignored.
How to use the Video file size (minutes × bitrate)
What does the Video file size (minutes × bitrate) do?
Estimate video file size from duration and bitrate; It applies this page-specific rule: a 10-minute 8 Mbps video is 10 × 60 × 8 / 8 = 600 MB before audio and container.
Which inputs does this tool use?
To estimate video file size from duration and bitrate, enter Minutes, Video Mbps, Audio Mbps (optional); keep every value in the same example; the page then updates the result from the current values; Start with a familiar case covered by this rule - These are uncompressed-from-the-encoder estimates - so the expected result can confirm the settings.
How should the tool result be read?
For a result intended to estimate video file size from duration and bitrate, these are uncompressed-from-the-encoder estimates; read audio mbps (optional) together with the original minutes rather than as an isolated answer, and confirm that its units or structure match the intended use.
Is 1080p always the same size?
When the goal is to estimate video file size from duration and bitrate, no.
Audio?
When using the page to estimate video file size from duration and bitrate, optional extra Mbps.
Limits and accuracy
When using this tool to estimate video file size from duration and bitrate, storage labels on disks use decimal GB on the box and often GiB in Windows; check the result in its intended destination before relying on it for important work; keep minutes until the output has been checked in its intended destination. For a repeatable check when you need to estimate video file size from duration and bitrate, record Minutes alongside the final output and selected options. A known example using minutes can confirm how the page will estimate video file size from duration and bitrate. While trying to estimate video file size from duration and bitrate, read the status message before copying or downloading because it can identify an incomplete or unsupported Audio Mbps (optional).
How this works
A 10-minute 8 Mbps video is 10 × 60 × 8 / 8 = 600 MB before audio and container. Add an audio bitrate (128 kbps is 0.128 Mbps) if you care about that slice.
These are uncompressed-from-the-encoder estimates. Two-pass encodes, variable bitrate and different codecs at the “same Mbps” will land near this number, not on it.
Storage labels on disks use decimal GB on the box and often GiB in Windows. This page reports MB/GB as 10⁶ / 10⁹ bytes.
Frequently asked questions
Is 1080p always the same size?
No. Bitrate decides size, not resolution.
Audio?
Optional extra Mbps. 128 kbps = 0.128.
Live stream?
Same formula for a recorded hour at a steady rate.