PoE power budget

Enter the PoE output budget available at the switch (PSE), not the power supply rating or the switch’s mains consumption. For each group enter the number of identical devices and the power reserved per port at the switch. Add groups for different allocations, such as cameras and access points.

Use the allocation shown by your switch or specified for its PoE class/negotiation. Measured device consumption (PD) can be lower: cable losses and the switch’s reservation policy matter. This planner does not convert PD power to PSE power or negotiate PoE classes.

Allocated power is the sum of count × allocation. Power free is budget minus allocations minus your optional reserve; a deficit is shown as power shortfall. The reserve protects future headroom and does not consume a port.

Port count and per-port limit are independent optional checks. Blank means unknown, zero is a real zero limit. Each device uses one port. The entered per-port limit applies to every group; switches with different port capabilities require separate checks. A positive total remainder alone does not prove PoE compatibility.

The budget bar shows device allocations in blue, reserve in amber and any excess in red. The vertical line marks the available budget. Results update as you edit. An invalid port count or per-port limit omits only that check. The browser keeps your inputs and device groups.