Camera count

CCTV Camera Quantity Calculator

How many cameras does the site actually need? Enter the boundary or route length to cover, how wide a scene each camera usefully sees, the overlap you leave between cameras, and the key points that each need their own camera. You get the total, the perimeter count, and the recorder channel size to plan for. Planning figures; runs in your browser.

Length to cover (m)boundary wall, corridor or route runCoverage width / camera (m)= usable scene width of your lens; use the Lens & FoV calculator

Overlap between cameras (%)10–20% avoids blind gapsDedicated key pointsgates, entrances, tills — one camera each

Effective coverage per camera8.5 m

coverage width × (1 − overlap) — the run each camera really holds after you leave an overlap.

Cameras in total

Perimeter cameras

Dedicated cameras

Recorder

Plan for at least an 0-channel recorder

next standard NVR/DVR size above your 18 cameras

Planning estimate only — real counts depend on the actual site layout, camera lens and blind spots. Walls, corners, pillars and mounting height all change what a camera really holds, so verify against a site plan and confirm with a walk-through before you order.

Turn the count into a plan

Check each camera's coverage Get the coverage width per lens CCTV coverage planning Build a camera schedule

Related Guides — Deep-dive reading

CCTV Coverage Planning in India (2026): Think in Coverage, Not Cameras

Plan a home CCTV scheme by the coverage it produces, not the number of cameras you buy: map choke points, overlap so every camera is watched by another, keep entry-to-exit continuity, and set the pixels-per-metre each zone actually needs.

Security

CCTV Installation Planning in India (2026): From Site Survey to a Camera Plan

The measure-twice, install-once master guide: walk your plot, list what you are protecting, sketch a plan, mark every camera position, then size power, network, permissions and budget before a single bracket is drilled.

Security

CCTV NVR vs DVR in India (2026): Choosing the Right Recorder

The recorder is the brain of a CCTV system. What separates a DVR from an NVR, how each one wires up, why channel count and total bandwidth both matter, and how to pick the box that fits your cameras and your Indian home.

Security

Related Tools — You may also find these useful

CCTV Camera Coverage & Count Calculator

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.

CCTV Calculator

CCTV Camera Overlap Calculator

The overlap or blind gap between two adjacent cameras, from coverage width and spacing, plus the spacing for a target overlap.

Overlap

CCTV Lens & Field-of-View Calculator

Focal length, sensor and resolution to field-of-view angle, scene width and DORI detect/observe/recognise/identify distances.

Lens & FoV