File size estimator

Video Size from Bitrate

Estimate video file size from bitrate, duration, and audio settings before exporting.

Bitrate to size workspace

Estimate how large a video will be from bitrate and duration.

Video bitrate

Bitrate unit

Duration

Duration unit

Audio bitrate Kbps

Result

Estimated file size: 384.6 MB (0.385 GB).

Estimated MB

384.6 MB

Estimated GB

0.385 GB

How it works

1 Enter the video bitrate and duration.
2 Add an audio bitrate if the export includes sound.
3 Use the estimated MB or GB result for planning.

FAQ

Are calculations sent to a server?

No. These calculators run locally in your browser and do not upload files or inputs.

Are the results exact?

They are planning estimates. Real exports can vary because codecs, motion, audio, metadata, and platform re-encoding all affect final size and quality.

Why can the exported file differ?

Variable bitrate encoders, container metadata, and compression complexity can make real files smaller or larger.

Want professional polish?

These calculators help you plan exports. Aufzeichna's desktop app helps you create the polished recording with cinematic zoom, smooth cursor motion, and export control.

Check out the desktop app