PoE Power Budget Calculator
One cable should carry both data and power — but only if the switch can supply the watts. Enter how many cameras of each PoE class you have and the calculator totals the load, then tells you the minimum switch port count and PoE budget to spec. Always leave ~20–30% headroom for future expansion and inrush current.
Your cameras
e.g. 7W per AP, 5W per phone
Results
Total PoE load: – W
With headroom: – W
Cameras + devices: –
Min ports (incl. uplink): –
Recommended switch: –
Switch "PoE budget" is the shared wattage it can deliver across all ports — not per-port. A 120W budget switch powers roughly eight 15.4W cams, not sixteen.
Read the PoE switch guide