Video File Size Calculator

Estimate video file size from duration, resolution, FPS, and bitrate. Free MB/GB calculator.

Parameters

Enter the required details below

Ready to Calculate

Enter your parameters and click calculate to see the results here.

How to Use

Enter Duration (Minutes).
Choose Resolution.
Choose FPS.
Click Calculate to see Est. Size and Est. Size (MB).
Check the result. Use Reset if you want to try different numbers.

About This Calculator

File size is driven by bitrate × time. Resolution and frame rate help you pick a bitrate; the number is an estimate, not a guarantee from your encoder.

Frequently asked questions

How do you calculate video file size?+

Multiply bits per second by duration, then convert to MB or GB. Higher resolution and FPS usually need a higher bitrate for the same quality.

Is Video File Size Calculator free to use?+

Yes. Video File Size Calculator is free and does not require an account. The calculation runs in your browser.

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