Video file size

Estimate storage from duration, video bitrate and audio bitrate. See which assumptions drive the result.

Video file size Runs in your browser

Before you start

What this tool does

Resolution alone cannot tell you how large a video will be. This calculator uses the average video and audio bitrates you supply, plus an explicit allowance for container overhead.

The working

Bytes = duration seconds × (video Mbps × 1,000,000 + audio kbps × 1,000) ÷ 8 × (1 + overhead fraction).

Where the estimate stops

Variable bitrate can differ substantially between scenes and encoding settings. The result is a planning estimate, not a claim about a particular encoder or service.

How we handle data

Understand the result

A little context goes a long way.

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