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Video File Size Calculator

Estimate how much storage a video will need using its duration, video bitrate, audio bitrate, and an allowance for file overhead.

Video settings

Enter the duration and estimated bitrates.

Video duration

The main video stream's bitrate.

Set to 0 if the video has no audio track.

Both bitrate fields use the selected unit. For example, 192 Kbps audio is 0.192 Mbps.

%

An optional allowance for container data and other overhead.

Estimated file size

392.40 MB

Approximate storage required for the video.

Size breakdown

Video stream375.00 MB
Audio stream14.40 MB
Overhead allowance3.00 MB
Total estimated size392.40 MB

Storage equivalents

Megabytes (MB)392.40 MB
Gigabytes (GB)0.39 GB
Terabytes (TB)0.000392 TB

This is an estimate based on average bitrates. Variable bitrate encoding, extra audio tracks, subtitles, metadata, and container details can change the final file size.

How video file size is calculated

Video data = Video bitrate × Duration

Audio data = Audio bitrate × Duration

File size in bytes = Total bits ÷ 8

Estimated size = Raw size × (1 + overhead percentage)

The calculator uses decimal storage units: 1 MB = 1,000,000 bytes and 1 GB = 1,000,000,000 bytes. Actual encoded files may differ.