Physical-port calculator

Does this network have enough Ethernet ports?

Each cable needs a real port at both ends. Count access-point uplinks, TVs, computers, cameras, storage, and a little room for tomorrow before the switch disappears behind a cabinet.

Your result

Every cable spends a port

Count router and switch capacity after uplinks, wired devices, shared ports, and a little reserve take their share.

Available does not always mean usable

Verify WAN-only ports, shared ports, link speeds, Power over Ethernet requirements, and the supported switch topology in the exact manuals.

The arithmetic is ours. For one current topology example, Google's hardwiring guide distinguishes router and point ports, switch use, and unsupported layouts. Verify those details in the manual for your exact equipment.