Surveillance Recording Retention Calculator · Storage planning

Recording retention calculator

Estimate how many days of footage your NVR can keep given camera count, storage volume, resolution, and recording schedule.

Recording parameters

Choose which stream to record. Only the selected stream counts toward storage.

Number of cameras

HDD volume (TB)

Codec (applies to both streams)

Recording hours / day24 h

Record from

Mainstream

High-quality recording stream

Recording

Resolution

Quality

Frame rate15 fps

Substream

Lower-res stream for live view / mobile

Resolution

Quality

Frame rate10 fps

Record audio

Adds ~96 kbps per camera

Estimated retention

8 cameras · 8 TB · H.265

56.1 days

56.1 days · 1,347 hours

mainstream (recorded)1.65 Mbps · 17.82 GB/day

substream (not recorded)0.08 Mbps

Per camera total1.65 Mbps · 17.82 GB/day

All cameras / day142.6 GB

Usable storage8000 GB

Days vs. cameras