Calculadora de Custo de Energia do Servidor
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
custo = W × 8760 × PUE × tarifa / 1000
About this calculator
This calculator estimates the annual electricity cost of a server. It considers power consumption in watts (W), the PUE (Power Usage Effectiveness) factor of the data center, the energy rate in R$/kWh, and the number of hours in a year (8760). The result is the total cost in reais per year.
The calculation is simple: multiply the server power (W) by the number of hours in a year (8760) and by the PUE, then divide by 1000 to convert to kWh and multiply by the rate. For example, a 500W server with PUE 1.5 and rate R$0.80/kWh costs 500 * 8760 * 1.5 / 1000 * 0.80 = R$5,256.00 per year.
Use this calculator for IT budgeting, comparing efficiency of different servers or data centers, or evaluating the impact of energy-saving measures. It is useful for IT professionals, infrastructure managers, and companies looking to reduce operational costs.
Cautions: PUE varies with data center efficiency (typical values between 1.2 and 2.0). The rate should include taxes and fees. The calculation assumes continuous operation (24/7); if the server is not running all year, adjust the hours. Also consider seasonal rate variations.
Frequently asked questions
What is PUE and how does it affect cost?
PUE (Power Usage Effectiveness) measures data center efficiency. Lower PUE means more efficient. A PUE of 1.5 means for every watt used by the server, an extra 0.5 watt is used for cooling and infrastructure, increasing total cost.
Can I use this calculator for cloud servers?
Yes, but you need to know the equivalent watt consumption and the cloud provider's PUE (some disclose it). Otherwise, consider using an average PUE of 1.2 to 1.5 for modern data centers.
How to calculate cost if the server is not on 24/7?
Replace 8760 with the actual number of hours the server operates per year. For example, if it is on 12 hours a day, 365 days, use 4380 hours.
Should the energy rate include taxes?
Yes, for a real cost, use the final rate with all taxes and fees (ICMS, PIS, COFINS, etc.). Check your electricity bill.
Is the result accurate for any server?
Accuracy depends on input data. Actual power varies with workload. For better accuracy, measure consumption with a wattmeter or use manufacturer data under typical load.