4K (2160p) at 120 fps — Bitrate & Storage Calculator
Instantly calculate the file size and bandwidth needed for 4K (2160p) (3840×2160) video at 120 fps. Adjust settings below.
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3840×2160 @ 120fpsVideo Bitrate Range
Use These Settings in OBS
OBS → Settings → Output → Streaming
Codec Comparison
| Codec | Bitrate | File Size | vs H.264 |
|---|---|---|---|
| H.264 (AVC)active | 70.13 Mbps | 29.39 GB | 100% |
| H.265 (HEVC) | 42.13 Mbps | 17.66 GB | 60% |
| VP9 | 42.13 Mbps | 17.66 GB | 60% |
| AV1 | 35.13 Mbps | 14.72 GB | 50% |
| ProRes 422 | 245.13 Mbps | 102.73 GB | 350% |
| ProRes 4444 | 350.13 Mbps | 146.74 GB | 499% |
How Much Storage Does 4K (2160p) at 120 fps Need?
Recording or streaming at 4K (2160p) (3840×2160) and 120 fps produces high-quality video, but file sizes can be substantial. The exact storage depends on the codec you choose — H.264 produces larger files, while HEVC and AV1 offer significantly better compression at comparable quality.
For example, a 10-minute 4K (2160p) clip at 120 fps with H.264 can easily exceed several gigabytes. Professional workflows using ProRes will require even more space — making external SSDs and NAS systems essential for serious content creators.
Use the calculator above to get exact estimates for your specific settings, including audio quality and recording duration.
Frequently Asked Questions
How large is a 1-hour 4K (2160p) 120 fps video file?
Using H.264, a 1-hour 4K (2160p) video at 120 fps is approximately 29.39 GB. With HEVC (H.265), it drops to around 17.66 GB — about 40% smaller.
What bitrate should I use for 4K (2160p) at 120 fps?
For 4K (2160p) (3840×2160) at 120 fps with H.264, a bitrate of 70.0 Mbps is recommended. Using HEVC or AV1, you can achieve similar quality at 42.0 Mbps.
What internet speed do I need to stream 4K (2160p) at 120 fps?
You need at least 105.2 Mbps upload speed for 4K (2160p) 120 fps streaming with H.264. With a more efficient codec like HEVC, 63.2 Mbps is sufficient. We recommend 1.5× headroom above your stream bitrate.
Is 4K (2160p) at 120 fps good for YouTube/Twitch?
4K (2160p) at 120 fps is excellent for YouTube uploads where viewers can select quality. For Twitch, most streamers use 1080p60 due to bitrate caps, but 4K (2160p) recording for local editing is common among professional creators.