About

Power over Ethernet (PoE) delivers power and data over Ethernet cables, supporting devices like IP cameras, VoIP phones, and access points. This calculator supports IEEE 802.3bt (PoE++) and earlier standards, calculating power budgets, voltage drops, and cable losses. It warns if the budget or port count is exceeded, visualizes power allocation, and supports device profiles.

How to Use

• Enter the switch's power budget, PoE port count, and PSE voltage (44–56V).
• Add devices by selecting PoE class, power consumption, cable length, and priority.
• Optionally load or save device profiles for quick setup.
• Click "Add Device" or "Remove" to manage the device list.
• Click "Calculate" to see total consumption, voltage drop, budget status, and a power chart.
• Click "Export Results" to download results as a text file.

Tips

• Check device datasheets for accurate power and voltage requirements.
• Use Cat6 or better cables for 802.3bt to minimize power and voltage loss.
• Leave 10-20% spare budget for flexibility and power spikes.
• Ensure PSE voltage is sufficient for long cable runs to avoid under-voltage.
• Prioritize critical devices (e.g., cameras) to optimize power allocation.