CCTV cameras recording to an NVR

CCTV HDD Storage Calculator

Manufacturer-specification-based CCTV storage estimation — find out how much hard disk space you need for your cameras and backup period.

Calculation basis: 24-hour continuous recording. Bitrate dynamically adapts between IP (efficient Smart H.265 bitrates) and Analog (standard DVR stream bitrates). A 10% margin is added for filesystem overhead and formatted-capacity loss. Actual usage varies with scene activity, lighting and encoder settings — motion-based recording typically uses less.

Need help planning your CCTV system?

Our engineers will survey your site and recommend the right cameras, NVR/DVR and storage for your retention needs.

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