Estimate NVR storage from camera count, average bitrate per camera, daily recording hours and retention days.
Results are for information and preliminary estimation. For critical technical work, manufacturer data, local codes and qualified professional review take precedence.
Storage ≈ total bitrate × recording seconds / 8. VBR, motion recording, codec and filesystem reserve affect real usage.
Example: Four 4 Mbps cameras recording 24/7 for 14 days can require several TB of raw storage.
Computer and network tools provide practical capacity planning. Vendor limits, protocol overhead, codecs and real connection quality can move results away from theoretical values.
It can reduce bitrate for similar perceptual quality, but the real average depends on scene and camera settings.
Leave headroom for filesystem, indexes, healthy free space and any RAID overhead.
Tell us if a calculation is unclear, incomplete or appears incorrect.