Power Consumption Server Calculator

Server Power Consumption Calculator
Estimate real electricity draw, heat output, and monthly cost for your servers — not just nameplate wattage.
Sets a starting wattage below — feel free to adjust it to your actual hardware.
1500
50W2000W
%
0%100%
Servers draw ~40% of nameplate power even at idle — this isn't a linear scale.
Efficiency, Redundancy & Facility
These turn IT load into what you'll actually pay and how much cooling you need.
%
75%98%
1.02.5
1.0 = no overhead. Typical colocation is 1.4–1.8; home labs can use ~1.1.
124
$
Cost per kWh, from your utility bill.
Your Estimate
Estimated monthly electricity cost
—
IT load (before overhead)
—
Total facility power draw
—
Heat output
—
Cooling required
—
Annual cost & circuit requirement
—
Where the power goes
IT load
Redundancy overhead
Facility (PUE) overhead
Monthly cost by redundancy level
Other levels
Your selection
Power Details
This calculator uses standard capacity-planning formulas (IT load ÷ PSU efficiency × redundancy × PUE) and typical grid CO₂ factors. Nameplate wattage is a maximum rating, not a measured draw — for final budgets, use a PDU, UPS, or plug-in power meter.