PoE Power Budget Planner

Check whether a switch can really power everything you plug into it.

What you provide

Switch PoE budget(W)

Printed on the datasheet as the total PoE power budget, not the power supply rating.

802.3af devices (15.4 W ports)

Most IP phones, older access points, basic cameras.

802.3at devices (30 W ports)

Wi-Fi 5 and 6 access points, pan-tilt-zoom cameras.

802.3bt Type 3 devices (60 W ports)

802.3bt Type 4 devices (90 W ports)

Result

PASS

126.8 W spare out of 370 W

The budget covers these devices with 127 W to spare. Worth noting that switches negotiate down under LLDP where devices support it, so the real draw usually sits closer to the 206 W device figure than to the allocated total.

PoE budget

243 Wpass

Within budget
Tight
Over

Switch budget: 370 W

Diagnostic telemetry

Devices: 12
Switch budget: 370 W
Allocated at the portsWhat the budget is actually charged: 243.2 W
Drawn at the devicesThe lower figure a power meter would show: 205.6 W
Headroom: 126.8 W
Budget used: 66%

What this cannot tell you

Arithmetic on the class allocations you enter. It does not query your switch and cannot see what is really drawing power.
Class allocation is a worst case that assumes a full-length cable run. Devices supporting LLDP often negotiate down to their real draw, so a switch may comfortably power more than this suggests.

Take this with you

PoE Power Budget Planner on RunTheTests — free browser-based sysadmin tools, no sign-up.