PoE Budget Calculator

Check whether a PoE switch has enough total and per-port capacity for CCTV cameras, access control, wireless equipment and other powered devices.

How PoE budget calculations work

A device can pass the per-port check while the complete group still exceeds the switch's total power budget. The overhead allows margin for startup load, cable losses and future changes.

Use this calculator with the PoE UPS Battery Calculator and wiki guides to Power over Ethernet standards and power classes, network switch selection and UK network cabling practice.