Recording duration

CCTV Recording-Duration Calculator

Will your recorder keep enough history? Enter the cameras, the bitrate, the recording hours and the storage you have to see how many days and weeks of footage it holds, the storage it burns each day, and how much more you would need to hit a 30-day target. Planning figures; real bitrate varies. Runs in your browser.

Number of camerasTotal storage (TB)

Bitrate / camera (Mbps)2 MP ~2–4, 4 MP ~4–8, 8 MP ~8–16 — check your cameraRecording hours / day24 for round-the-clock

Record mode

Motion recording writes only when something moves, so it stretches storage further.

0.0 days

Retention held

0.0

Weeks

0.0 GB

Used per day

30-day retention target

Not met

to keep 30 days you would need about 11.5 TB

Based on 8 cameras writing 24.0 effective hours/day, with 90% of the disk usable.

Planning estimate only — real bitrate swings with scene detail, motion and codec (H.265 uses less than H.264), and recorders reserve overhead. Use it to size storage, then confirm the actual figure on your DVR/NVR.

Size the storage & keep it legal

CCTV storage calculator Storage & bitrate calculator Sizing CCTV storage CCTV footage retention (DPDP)

Related Guides — Deep-dive reading

Data Storage Cost for CCTV in India (2026): Local Disks vs Cloud, and How to Size It

The running cost people forget when they buy cameras. Where the footage actually lives — a one-time surveillance hard disk in the recorder, or a recurring per-camera cloud plan — and how camera count, resolution, frame rate, recording mode and retention days decide how many terabytes, and how much money, you really need.

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CCTV Storage and HDD Sizing in India (2026): Getting the Days You Need

Why a surveillance-grade drive, not a desktop one, sizing storage by retention and bitrate, how many HDD bays and when RAID earns its place, loop recording and keeping drives healthy — for Indian homes and small buildings.

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Related Tools — You may also find these useful

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Cameras, resolution, frame rate, codec and retention days to per-camera bitrate, daily footage size, total NVR storage and a suggested disk.

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Estimate how many CCTV cameras you need, the NVR channels, storage in TB for your retention period, and an indicative all-in cost with GST.

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Compare cloud CCTV subscription against a local NVR + HDD — upfront, 5-year total, monthly fee and break-even.

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