FREE ENGINEERING REFERENCE
PoE budget calculator
This PoE budget calculator checks one switch at a time: enter the available switch PoE budget in watts, the number of powered ports, the per-port PSE capability (802.3af, 802.3at, or 802.3bt Type 3 or Type 4) and a percentage to hold in reserve, then add each device or AP with its quantity, device wattage and PoE class. It reports a budget assessment, the PSE allocation, the watts remaining after reserve, ports required against ports available and a per-device port check, and if a device's class is unknown the result is shown as an estimated minimum only.
Runs entirely in your browser. No account or subscription required.
Inputs are remembered only on this device.
Quick checks for Wi-Fi planning work
Use these calculators as planning references, then validate a design against the equipment datasheet, site conditions and measured results.
FAQ
Using the Wi-Fi engineer toolbox
Are these Wi-Fi calculators free to use?
Yes. The tools run in your browser and do not require an account or subscription.
Do the tools replace a wireless survey or equipment datasheet?
No. They provide planning checks. Confirm assumptions with current vendor documentation, site conditions and survey measurements.
Where are my calculator inputs stored?
Inputs are remembered only on the device and browser you use.