Professional Tools
Built by Installers, For Installers
Paging System Planner
Visual overhead paging system designer. Plan speaker placement, amplifier sizing, and 70V line distribution for any building layout.
Fire Alarm Battery Calculator
NFPA 72 battery sizing with real manufacturer device data from System Sensor, Wheelock, and Notifier. Includes NAC voltage drop calculator with point-to-point and end-of-line methods.
PoE Budget Calculator
Plan Power over Ethernet budgets for cameras, phones, access points, and access control devices. Ensure your switch can handle the load.
Camera Coverage Planner
Visual floor plan tool to plan security camera placement, coverage zones, and blind spots. Optimize camera count and positioning.
Cable Tray Fill Calculator
Fill calculator for conduit, J-hooks, basket trays, and fire-rated sleeves. NEC 392 and TIA-569 compliant. Size any pathway type from one tool.
Need a specific tool?
We're always building new tools based on what our techs and project managers need in the field. If there's a calculator or planner you'd find useful, let us know.
Suggest a ToolFrequently Asked Questions
Yes. Every calculator on tssusa.net is free with no account required. They're built and maintained by licensed low-voltage professionals at TSS USA.
Yes. The conduit fill calculators follow NEC Chapter 9 Table 1 fill rates (40% for 3+ conductors, 31% for 2, 53% for 1). Wire sizing and voltage drop calculators use NEC Table 310 ampacity values and Article 215 drop recommendations. Fire-rated sleeve calculations use UL-tested manufacturer data from STI EZPath and Hilti CFS-MSL spec sheets.
Yes. The Conduit Fill Calculator page includes a free HTML iframe embed code that works on any site — WordPress, Squarespace, Webflow, or plain HTML. No license fee, no expiration, no attribution requirement beyond the credit link included in the snippet.
For Cat5e/Cat6/Cat6A only, use the Cat6 Conduit Fill Calculator. For mixed low-voltage bundles (Cat6 + fire alarm + access control + coax), use the Low-Voltage Conduit Fill Calculator. For fire-rated sleeves (STI EZPath, Hilti CFS-MSL), use the Fire Sleeve Fill Calculator. For general conductor counts (THHN, XHHW), use the main Conduit Fill Calculator.
