Security & CCTV

CCTV Storage Calculator

Storage is arithmetic: bitrate x hours x days x cameras. A single 4 Mbps camera writes 43 GB every day.

Calculator

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How it works

GB per camera-day = Mbps x 3600 x hours / 8 / 1000. Multiply by cameras and retention days for the total. Motion-triggered systems typically use 30-60% of the continuous figure.

Frequently asked questions

How much storage does one CCTV camera need?

At a typical 4 Mbps, about 43 GB per day of continuous recording - 1.3 TB for 30 days. Halve the bitrate and you halve the storage.

How many days must CCTV be kept?

There is no universal law - 30 days is the common commercial norm (31 for some licensing conditions). Insurers or licensing authorities may specify more.

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