CCTV Storage Calculator
Calculate CCTV retention storage by camera count, bitrate, recording hours, RAID, and spare.
Open ToolAccess Control Door Hardware Planner
A door hardware planning tool for access control systems using door count, controller capacity, lock load, supply voltage, and backup duration.
Inputs
Forms are empty on load. Use sample data to preview the workflow or enter your own project values.
Learn more
Formula logic, use cases, assumptions, and limits for this tool.
How this tool helps
Use this to plan access control material quantities and power supply sizing before BOQ finalization.
Assumptions and limits
This tool provides a planning-level result. It does not replace detailed engineering design, approved software, manufacturer data, authority requirements, or project specifications.
Typical use cases
- Early estimation and tender support.
- BOQ sanity checking and technical review.
- Site discussion before final engineering verification.
- Comparison of alternatives using consistent assumptions.
Result interpretation
Read the recommendation, warning, and confidence sections together. A result without warnings is still not an approval; it only means the entered values did not trigger built-in planning alerts.
Input definitions and typical values
These notes explain what each input means and which values usually produce a more reliable planning result.
Controlled doors doors
Project input used directly in the calculation. Use measured, scheduled, manufacturer, or authority-approved values where available.
Readers per door readers
Project input used directly in the calculation. Use measured, scheduled, manufacturer, or authority-approved values where available.
Doors per controller doors/controller
Project input used directly in the calculation. Use measured, scheduled, manufacturer, or authority-approved values where available.
Lock power per door W
Project input used directly in the calculation. Use measured, scheduled, manufacturer, or authority-approved values where available.
Power supply voltage VDC
System voltage. Common LV systems include 230 V single-phase and 400/415 V three-phase; use project nominal voltage.
Battery backup duration hours
Electrical current or battery input. Use measured standby/alarm current or manufacturer datasheet values for better results.
Spare capacity %
Future spare capacity. 10-25% is common in early MEP planning, depending on client growth and infrastructure constraints.
Practical verification checklist
- Confirm the selected standard profile is suitable for the project location and authority.
- Replace sample values with project drawings, schedules, equipment data, or measured site values.
- Review warnings, methodology, and PDF report before using the result outside early planning.
- Verify final decisions against official standards, manufacturer data, consultant specifications, and local approvals.
Related tools
Other tools in ELV.
Data Rack Power & UPS Calculator
Estimate rack load, UPS kVA, heat output, and battery energy requirement.
Open ToolCalculation methodology
Door quantities are converted into controllers, readers, locks, power supply current, and backup battery Ah.
Inputs are treated as planning assumptions. The calculator shows warnings when entered values fall outside practical thresholds or selected standard-profile limits.
Version history
- v1.3.6-prelaunch: Added methodology, standard profile support, version notes, and direct PDF report download.
- v1.3.5: Calculator page added with sample data, warnings, and print-ready report layout.
Stage 2 roadmap: optional saved projects, dashboards, and shared calculation history without forcing login for free use.
Trust and verification
Every result includes assumptions, warning logic, and a downloadable report. Final engineering decisions still need qualified review, local authority approval, manufacturer data, and project specifications.
Worked example
Use the sample data button to load a realistic scenario, then download the PDF report to review inputs, results, methodology, warnings, and disclaimers in one place.