PoE Calculator

  1. To get started, select a switch from the dropdown, or, select custom, and fill in the Wattage in the newly available field.
  2. Then, enter the number of devices for each PoE class in the respective input fields.
  3. The calculator will dynamically compute the leftover budget after considering the power consumption of the devices.
  4. You can view the PoE power allocation table to understand the power limits

Hi 👋👋, I'm Michael Dijk 🤓, an AV systems Engineer for NETGEAR. Outside of work, I'm a full-stack developer working on various small projects.

Class IEEE PoE Standard PSE - Max Power Delivered (W) PSE Voltage Range PD - Power Available (W) PD Voltage Range
0 IEEE 802.3af, PoE (2 pair) 15.4 44 – 57 V 12.95 37 – 57 V
1 IEEE 802.3af, PoE (2 pair) 4 44 – 57 V 3.84 37 – 57 V
2 IEEE 802.3af, PoE (2 pair) 7 44 – 57 V 6.49 37 – 57 V
3 IEEE 802.3af, PoE (2 pair) 15.4 44 – 57 V 12.95 37 – 57 V
4 IEEE 802.3at, PoE+ (2 pair) 30 50 – 57 V 25.5 42 – 57 V
5 IEEE 802.3bt, Type 3 (4 pair) 45 50 – 57 V 40 42 – 57 V
6 IEEE 802.3bt, Type 3 (4 pair) 60 50 – 57 V 51 42 – 57 V
7 IEEE 802.3bt, Type 4 (4 pair) 75 52 – 57 V 62 51 – 57 V
8 IEEE 802.3bt, Type 4 (4 pair) 90 52 – 57 V 73 51 – 57 V

Mode Description
Static Mode The power deducted from the total available PoE is the maximum power for that interface, based on the PoE class specified by the device, or, when specified in the Power Limit configuration, under PoE Port Configuration. Using this mode ensures that the maximum power specified by you, or, class, for the interface is always reserved and cannot be shared by other PDs.
Dynamic Mode The power deducted from the total available PoE for each port is the actual power consumed by that given port. You can allocate any unused portion of power to the other PDs. By default, this is the mode that the switch is configured in.

If you have a feature request or an idea to improve our PoE calculator, we encourage you to log it on our GitHub page. Please navigate to our GitHub Issues section and click on the "New Issue" button. From there, select the "Feature Request" template and provide as much detail as possible about your suggestion. I regularly review these requests and appreciates your valuable input!

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