Fire Alarm Battery Backup Calculator
Calculate standby Ah, alarm Ah, derating, spare margin, and recommended battery size.
Open ToolFire Alarm and ELV Calculators
Fire alarm battery, loop load, DIP switch, CCTV storage, data rack UPS, and access control planning calculators. Find relevant calculators, standards.
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Fire Alarm Loop Load Calculator
Check device count, loop current, capacity usage, address usage, and spare margin.
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Fire Alarm DIP Switch Calculator
Interactive DIP switch addressing for ZETA, Notifier, and Simplex-style fire alarm devices.
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CCTV DVR Storage Calculator
Estimate CCTV DVR/NVR storage by camera count, bitrate, recording hours, retention, and RAID factor.
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Data Rack Power & UPS Calculator
Estimate rack load, UPS kVA, heat output, and battery energy requirement.
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Access Control Door Hardware Planner
Build controller, reader, lock, REX, contact, PSU, and battery quantities.
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Intruder Alarm Battery Calculator
Calculate intruder alarm battery size from standby load, alarm load, siren duration, derating, and spare.
Open ToolHow to use this collection
Start with the calculator closest to the project question, load the sample data, then replace values with your project assumptions. Use warnings and methodology notes to decide what needs formal verification before procurement, authority submission, or construction.