Free · calculated locally
A defensible starting point for your alarm-system design.
Enter the accessible openings and the relevant risk context. The planner produces an indicative EN 50131 grade, product-line direction and device count without transmitting your information.
~5 minutesfor the first estimate0 uploadscalculation stays localClear assumptionseach quantity is explainedPrintable resultfor an on-site review
Important boundary
A quantity estimate is not a certified system design.
Radio coverage, escape routes, surveillance law, fire-safety requirements, structural conditions and insurer acceptance need an on-site review. The EN grade applies to the complete designed and installed system—not to individual devices in isolation.