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Video File Size Calculator

Estimate a video file's size from its bitrate and length.

Calculated Output

File size (GB) 2.25

File size (MB) 2,250

Formula: size = bitrate * duration * 60 / 8

Step-by-Step Breakdown

1. Values used:

2. Bitrate = 10 Mbps

3. Duration = 30

5. File size = 2.25GB

6. File size = 2,250MB

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The math behind it

size (MB) = bitrate (Mbps) x duration (s) / 8. Divide by 1000 for gigabytes.

10 Mbps for 30 minutes is about 2.25 GB.

How do I shrink it?

Lower the bitrate or resolution, or use a more efficient codec like H.265.