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Data Center Power Budget Calculator

Calculate total facility power, energy costs, and overhead breakdown from IT load and PUE.

Inputs

%
%
%

Results

Total facility power (kW)

300

Overhead power (kW)100
Estimated cooling (kW)65
UPS losses (kW)12.77
Monthly energy cost ($)$21,900.00
Annual energy cost ($)$262,800.00
Cost per IT kW/month ($)$156.43
Annual CO₂ (metric tons)1,103.76
Pdu Loss Kw6.19
How to Use This Calculator
  1. Enter the planned IT equipment count and average power draw per device.
  2. Set UPS efficiency and PDU loss factor.
  3. Input PUE target for the facility design.
  4. Review total IT power, total facility power, and power per rack.
  5. Use the power budget to size utility service entrance, generators, and UPS capacity.

How the result changes with IT load (kW)

IT load (kW)Total facility power (kW)
10,00015,000
35,00052,500
65,00097,500
90,000135,000

What each input means

IT load (kW)
Total IT equipment power draw in kilowatts.
PUE
Power Usage Effectiveness. 1.0 = perfect, industry avg ≈ 1.58.
Electricity rate ($/kWh)
Blended electricity cost per kilowatt-hour.
UPS efficiency (%)
UPS operating efficiency. Modern online UPS: 94-97%.
PDU efficiency (%)
Power distribution unit efficiency. Typically 97-99%.
Capacity utilization (%)
Percentage of provisioned IT capacity actually in use.

What each result means

Total facility power (kW)
IT load × PUE = total power consumed by the facility.
Overhead power (kW)
Non-IT power (cooling, UPS losses, lighting, etc.).
Estimated cooling (kW)
Estimated cooling system power draw.
UPS losses (kW)
Power lost to UPS conversion inefficiency.
Monthly energy cost ($)
Monthly electricity bill for the entire facility.
Annual energy cost ($)
Yearly electricity cost.
Cost per IT kW/month ($)
Monthly cost per usable IT kilowatt at current utilization.
Annual CO₂ (metric tons)
Estimated annual carbon emissions (US avg grid: 0.42 kg/kWh).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    IT load (kW) = 200, PUE = 1.5, Electricity rate ($/kWh) = 0.1, UPS efficiency (%) = 94 = 6 input(s) provided
  2. Calculate Total facility power
    Total facility power = itLoadKw * pue
    300 = 300
  3. Calculate Overhead power
    Overhead power = totalFacilityKw - itLoadKw
    100 = 100
  4. Calculate Estimated cooling
    Estimated cooling = overheadKw * 0.65
    65 = 65

Engine last updated .

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