Free Creator Utilities
Video File Size Calculator.
Estimate your exported or downloaded video file sizes. Change resolutions, formats, and durations in real-time to plan storage space, bandwidth requirements, and upload limits.
Mbps
Estimated bitrate for H.264 at 1080p.
Hours
Minutes
Seconds
Estimated File Size
600.00 MB
Total Bitrate (Video + Audio)
8.25 Mbps
Includes 256 kbps AAC audio allocation
5G Mobile Network
~10 seconds
Download estimate (50 Mbps)Broadband (100M)
~5 seconds
Download estimate (100 Mbps)Social Media Cap
Compatible
Easily upload to TikTok & IG.How to Estimate Video Size.
Video file size is determined primarily by Bitrate and Duration, rather than the resolution itself. A highly compressed 4K stream can actually be smaller than a completely raw 1080p video clip.
The general mathematical formula used in our calculator is:
File Size (MB) = (Bitrate (Mbps) * Duration (s)) / 8
To reflect real-world scenarios, our crawler adds a standard audio buffer allocation of 256 kbps (0.25 Mbps) for standard formats, and higher quality tracks for ProRes targets.
Codecs & Target Bitrates
| Resolution | H.264 (MP4) | H.265 (HEVC) |
|---|---|---|
| 4K (2160p) | 35-45 Mbps | 20-25 Mbps |
| 1080p (HD) | 8-12 Mbps | 5-7 Mbps |
| 720p (HD) | 4-6 Mbps | 2-3b Mbps |