Server Power Consumption Calculator – Watts and Cost
Calculate server power consumption and monthly electricity cost.
About This Calculator
Calculate server power consumption and monthly electricity cost. Use the calculator above for instant results.
Worked Examples
- Avg: 240W | Monthly: 172.8 kWh | Cost: $17.28/month
- Annual: $207
Answer: $207/year
- Avg: 840W | Monthly: 604.8 kWh | Cost: $72.58/month
Answer: $871/year
- Avg: 4,000W | Monthly: $230 | Annual: $2,764
Answer: $2,764/year
Who Uses This Calculator?
Calculate PUE and power budget.
Plan power capacity for server rooms.
Include power in total cost of ownership.
Budget data center utility costs.
Common Mistakes to Avoid
❌ TDP is maximum, not average
Servers rarely run at 100% TDP. Average utilization of 40-60% is typical for general-purpose servers.
❌ PUE adds overhead
Data center power usage effectiveness (PUE) = 1.1-1.6. Multiply server power by PUE for total facility cost. Google average: ~1.10.
Frequently Asked Questions
PUE explained?
PUE = Total facility power / IT equipment power. PUE 1.0 = perfect. 1.2 = good. 1.5 = average. 2.0 = poor (as much cooling/other as servers).
Cloud vs on-premise power cost?
Cloud providers have massive scale and low PUE (1.1-1.2). Small data centers: 1.5-2.0. Cloud often cheaper in power alone.
Green data center?
Major clouds (AWS, Google, Azure) target 100% renewable energy. On-premise needs REC purchases or direct renewable contracts.