CCTV Storage Calculator
Estimate the recording bandwidth, retention capacity and HDD storage required for a CCTV or IP video surveillance system.
- Camera quantity and resolution
- Frame rate and codec
- Scene activity estimation
- Recording duration
- Retention capacity
- RAID storage recommendation
CCTV Field of View Calculator
Calculate camera field of view, image detail and maximum operational viewing distances using camera resolution, sensor size and lens focal length.
- Horizontal field of view
- Image detail calculations
- OODPVCS categorisation
- DORI comparison
- Maximum viewing distances
- Supports custom sensors and resolutions
CCTV Camera Performance Calculator
Determine the minimum camera specification required to achieve a defined OODPVCS image-detail classification at a specified target distance.
- Minimum lens focal length
- Recommended sensor format
- Camera resolution selection
- Target pixel density
- OODPVCS performance analysis
- Supports custom targets and resolutions
CCTV Bandwidth Calculator
Estimate aggregate CCTV network bandwidth based on camera quantity, resolution, frame rate, codec and bitrate, then compare utilisation across common Ethernet link speeds.
- Aggregate camera bandwidth
- Automatic bitrate estimation
- Ethernet link utilisation
- Supports H.264, H.265 & MJPEG
- Multiple resolutions & frame rates
- Engineering reference calculations
Electronic security system design often requires engineering calculations, performance verification and technical validation. The tools below have been developed to help consultants, engineers, system integrators and end users design more effective security systems while reducing design time and improving consistency.
Each tool focuses on a specific aspect of the design process, from operational performance and camera selection through to storage, networking and system architecture. They are intended to support engineering decisions and should be used alongside the wider Security Design Process, relevant standards and project-specific operational requirements.
Whether you are designing a single-camera installation or a large enterprise security system, these free tools provide practical assistance throughout the design lifecycle
Security Engineering Principles
These tools are designed to support engineering decisions rather than replace professional judgement. Every output should be validated against the operational requirements, applicable legislation, relevant standards and the specific needs of the project.
For best results, use these tools alongside the guidance available within the Knowledge Base, Technology Guides, Design Guides and Security Design Process sections of this website.
Who These Tools Are For
These tools have been developed for anyone involved in the specification, design, installation or management of electronic security systems, including:
- Security consultants
- Security system designers
- Systems integrators
- Consulting engineers
- End users
- Facilities managers
- Estates teams
- Students and those developing their security engineering knowledge
All tools are free to use and are regularly updated to reflect current engineering practices and emerging technologies.