Security camera bandwidth depends primarily on bitrate, not resolution by itself. Camera count, codec, frame rate, image quality, scene complexity, and recording configuration all influence the amount of traffic generated.
Start with bitrate per camera
If one camera averages 4 Mbps and you have 16 cameras, the aggregate stream is about 64 Mbps before overhead or additional viewing traffic.
Why 4K does not tell the whole story
Two 4K cameras can use very different bandwidth depending on compression, frame rate, scene complexity, motion, and bitrate settings.
Continuous versus event recording
Recording schedule affects daily data volume, but the live camera stream may still exist continuously between cameras and recorder depending on architecture.
Allow headroom
Do not size uplinks exactly at the expected average bitrate. Add room for peaks, viewing sessions, future cameras, and other network traffic.
Use the Camera Bandwidth Calculator to estimate camera stream total, overhead allowance, recorder uplink utilization, WAN upload utilization, and daily data volume.
Remote viewing matters
Remote users can add WAN traffic. If several users view multiple high-resolution streams at the same time, WAN upload may become the limiting factor even when the local recorder network is fine.
Bandwidth and storage are connected
The same bitrate driving network traffic also drives storage usage. Use the NVR Storage Calculator to estimate retention.
Frequently asked questions
How much bandwidth does a 4K camera use?
There is no single number. Check the configured or observed bitrate.
Do motion cameras use less network bandwidth?
It depends on the system. Recording volume may drop, but live transport architecture can vary by platform.
Should cameras be on a dedicated VLAN?
Often, yes, for segmentation and management, but the design depends on the environment and platform.