Engineering tools / Power over Ethernet

PoE power budget

Validate active IEEE PoE standards, per-port power, and total switch supply with design headroom. Start with user-supplied values; no unsupported device specifications.

Switch capacity

Enter usable total switch PoE budget, not AC input wattage.

Powered devices

Use model maximum power requirements, not typical idle consumption.

Device 1

Capacity assessment

Conservative estimated supply-side power and compatibility results.

Within estimated budget

Estimated supply draw: 17.6 W
Available after reserve: 96.0 W
Headroom after reserve: 78.4 W

Example APPort fits

17.6 W estimated input; 25.5 W max to device.

Verify actual model-specific port limits and total PoE availability. IEEE active PoE only; do not connect passive PoE without checking voltage and polarity.

Methodology and limitations

IEEE mode reference: Ubiquiti PoE Availability and Modes. Port wattage is not switch total capacity, and actual device model support must be confirmed from its datasheet.