Power
PoE Budget Calculator
Match devices like cameras and access points to Power-over-Ethernet switch capacity. Plan your power budget with IEEE 802.3af/at/bt standards.
Switch Configuration
W
W
Power Budget Tips
- PSE vs PD power: Switches deliver PSE power, but devices receive less due to cable loss (typically 3-5W)
- Check device specs: Use actual device power draw, not just the PoE class maximum
- Plan for growth: Leave 20% headroom for future devices or power spikes
How to Use
- Enter your switch's total PoE power budget (in watts)
- Add devices using presets or custom power values
- Monitor the budget gauge — green is good, yellow is high, red is over
- Aim for ≤80% utilization to leave headroom
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Power Budget
0W used370W total
0%
0W
Used
370W
Remaining
PoE Standards Reference
| Standard | IEEE | PSE | PD | Pairs | Typical Devices |
|---|---|---|---|---|---|
| PoE | 802.3af | 15.4W | 12.95W | 2 | VoIP phones, basic cameras |
| PoE+ | 802.3at | 30W | 25.5W | 2 | PTZ cameras, wireless APs |
| PoE++ T3 | 802.3bt | 60W | 51W | 4 | High-end APs, video phones |
| PoE++ T4 | 802.3bt | 100W | 71.3W | 4 | Digital signage, thin clients |
PSE = Power Sourcing Equipment (the switch). PD = Powered Device. The difference accounts for cable resistance losses.
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