Networking
IP, subnet, and networking calculators.
PoE Power Budget Calculator
Check a PoE switch power budget per IEEE 802.3af/at/bt. Add powered devices by type and PD class to total the watts drawn, see the utilization and headroom, and confirm the load fits the switch budget and port count. Free, no sign-up.
Fiber Optic Loss Budget Calculator
Calculate a fiber optic link loss budget per TIA-568 and FOA. Add fiber length, connectors, and splices to total the cable plant loss in dB, then compare it to the transceiver power budget for the link margin and pass/fail. Free, no sign-up.
CCTV / NVR Storage Calculator
Calculate CCTV / NVR storage and bandwidth. Add IP cameras by resolution and codec (H.264/H.265) to get the hard drive size in TB for your retention days, plus the total network bandwidth. Free, no sign-up.
CCTV Lens & FOV Calculator
Calculate CCTV camera field of view and DORI distances. Enter sensor format, resolution, and lens focal length to get HFOV/VFOV angles and Detect, Observe, Recognize, and Identify ranges in feet per EN/IEC 62676-4. Free, no sign-up.