CCTV camera brands and profiles supported
The calculator carries verified bitrate and codec data for 13 camera profiles across 8 brands. Each profile cites the manufacturer datasheet or product-page URL with a retrieval date.
- Axis: AXIS P3268-LV (8MP), AXIS P3245-LV (2MP)
- Bosch: FLEXIDOME IP starlight 8000i (4K)
- CP Plus: CP-UNC-DC44ZL3-MD (4K Cosmic), CP-UNC-VA41ZL3C (4MP)
- Dahua: IPC-HFW5849T1-ASE-LED (8MP TiOC), IPC-HFW2449S-S-IL (4MP Starlight)
- Hanwha: Wisenet XNB-9002 (4K)
- Hikvision: DS-2CD2387G2-LU (ColorVu 8MP), DS-2CD2T46G2-2I (4MP AcuSense)
- Honeywell: HC30W45R3 (4MP MAXPRO)
- Prama: PT-NC424P-LZ (4MP ColorMax), PT-NC428P-LZ (8MP ColorMax)
Recording schedules supported
- 24/7 continuous — default baseline, all cameras recording at all times. Highest storage.
- Motion-triggered (30% / 50% duty) — recording fires only on detected motion events, saving storage proportionally.
- Business hours (12h/day) — scheduled-only recording for office and retail environments.
CCTV Storage Retention Calculator — Multi-brand, codec-aware
· Engineering advisory · CCTV Storage
Storage is bitrate × time. Bitrate is the discipline.
The calculator answers 'how much disk'. The engineering underneath — codec choice, smart-codec configuration, motion-trigger discipline, retention policy — is what separates a system that costs ₹4 lakh in disk from one that costs ₹15 lakh for the same camera count.
Deployment observations
- Codec generation drives 30-50% storage steps. H.264 → H.265 = 40-50% bitrate drop at equivalent visual quality. H.265 → H.265+ (Hikvision) / Zipstream (Axis) / WiseStream (Hanwha) = another 30-40% drop because the smart codec adapts bitrate to scene activity in real time. Specifying a 2026-generation camera with smart-codec features active typically halves the disk bill versus a 2018-generation H.264 install at the same camera count.
- Retention is policy, not preference. Indian commercial premises typically run 30 days as operational default; banking and BFSI 90 days; critical infrastructure 180 days; healthcare and education 60 days for dispute-window cover. Design to the regulatory or insurance minimum, oversize by 20-30% for in-flight investigations, and explicitly version-control the retention policy as part of the AMC.
- Recording schedule choice matters more than most clients realise. A 100-camera estate on 24/7 recording at 4 Mbps generates ~13 TB/day; the same estate on 30%-duty motion-trigger generates ~4 TB/day. Motion-trigger is the right answer in 80% of commercial installations — the false-alarm filtering on modern AcuSense / WizMind / Zipstream cameras has finally made motion-only practical.
Operational notes
- Surveillance-rated drives (WD Purple, Seagate SkyHawk, Toshiba S300) are non-negotiable for 24/7 NVR duty. Desktop drives fail within 18 months in continuous-write workloads. Carry 1-2 spare drives on the shelf from project inception.
- Cyber-security posture is now the dominant operational consideration. Every camera, NVR and VMS server is a lateral-movement entry point and must be patched, network-segmented (dedicated VLAN, no direct internet exposure) and monitored as critical IT infrastructure.
Lifecycle implications
- HDD refresh: 5-year proactive cycle on surveillance-rated drives. Failure rates rise sharply after year 5 in 24/7 duty. Camera refresh: 7-10 years outdoor, 10-15 years indoor. NVR/VMS server refresh: 5-7 years (storage controller obsolescence and OS support windows). Cabling: 20+ years if installed to spec — the structured cable plant outlives every device hanging off it.
- Spares strategy: hold 5% camera spares, 1-2 HDD spares per NVR. The manufacturer end-of-lifecycles a camera SKU 5-7 years post-launch; visual continuity (same lens FOV, same IR pattern, same housing colour) becomes the procurement headache thereafter.
· Why it matters
Storage retention is the question most CCTV calculators get wrong by 30-50% — they hard-code H.264 bitrate when the modern install runs H.265+ or Zipstream. They assume 24/7 recording when motion-trigger is operational reality. They quote storage in TB without translating to HDD count. This one carries codec-aware bitrate defaults per camera model, four recording schedules, multiple HDD-size plans and an NVR-vs-VMS recommendation against camera count. Eight brands · twelve verified camera profiles · sources cited per model · last verified 2026.
· Frequently asked
CCTV storage retention —
what people ask first.
How is storage actually calculated?
Storage in bytes = (cameras × bitrate × seconds × duty_factor) ÷ 8. With cameras at 16, bitrate at 8 Mbps (Hikvision 4K H.265+), 30 days at 24/7 duty, that's (16 × 8,000,000 × 30 × 86400) ÷ 8 = 4.15 × 10^13 bytes = 37.7 TB raw. The tool adds your headroom (default 20%) on top — so the recommendation lands around 45 TB.
Why does the calculator change storage based on camera brand?
Because codec generation drives bitrate. A Hikvision 4K H.265+ records at ~8 Mbps; an older H.264 4K at ~16 Mbps; an Axis Zipstream 4K at ~5 Mbps for equivalent quality. Same scene, same resolution, three different storage answers. The calculator carries the manufacturer-stated recording-stream bitrate for each camera profile and lets you override if your install measures differently.
What HDD size should we buy?
Surveillance-rated drives in 8 / 10 / 16 TB sizes. 8 TB is the commodity sweet spot (best ₹/TB). 16 TB makes sense for NVRs with limited bay count. The calculator shows the HDD count for each size; the right choice depends on the NVR's drive-bay count and the operational policy (RAID-1, RAID-5, RAID-6 affects usable capacity vs raw).
Does the calculator include the operating-system overhead and RAID parity?
Indirectly — the 20% default headroom buffer covers RAID-5 parity and OS overhead at common configurations. For RAID-6 deployments add another 10% headroom. For ZFS / Storage Spaces add ~5% on top. The calculator's exposed headroom slider lets you tune for your specific configuration.
Is this calculator a substitute for an NVR / VMS BOQ?
No. It is a sizing tool for the storage layer of an early-stage brief. It does not specify the NVR model, the licensing plan, the structured-cabling backbone, the network architecture (VLAN segmentation, switch sizing, multicast handling) or the cyber-security posture. Those are the design conversation. The calculator's outputs are the brief; the design is what follows.
· Begin
Sizing a CCTV estate
properly?
Send the floor plate, the camera count per zone, the retention policy and the recording schedule. We respond within two working days with a NVR/VMS architecture, an HDD plan and a network-layer note for the IT team.