DCLC

Data center load calculator

Size power and cooling for a rack or a room

Enter what you are deploying. This returns IT load, cooling in tons and BTU/hr, UPS capacity at your redundancy target, and a circuit check against the 80% continuous-load derate — with the assumptions shown so you can defend the numbers. Free, vendor-neutral, no signup.

Focused calculatorsCooling / BTUkVA ⇄ kWUPS sizingRack densityAI / GPU racksPDU / circuitsAI rack powerReceptacle reference

Start from a typical deployment

IT load

Power factor: 0.95 suits modern gear. 80 PLUS certification requires 0.9 or better at half load and up, and measured server supplies usually land between 0.95 and 0.99. The 0.8 figure you still see quoted is either legacy equipment or a UPS output rating, which describes the UPS rather than your load.

Used for annual energy cost. US commercial average is around $0.13.

Electrical

Enter what the rack already has to check whether this load fits.

UPS

Environment

Volume servers, networking gear. Most common enterprise class.

Results

v1.1.0
Open spec sheet for these numbers →
IT load
60kW
Cooling
17.1tons
Per rack
6.0kW
Heat rejection
204,729BTU/hr
Apparent power
63.2kVA
Facility power
90.0kW
UPS installed (N+1)
118.4kVA
Per UPS module
39.5kVA
Annual energy
$102kper year
Circuit loading50.6%
0%80% limit100%

Sized to 2 circuits per rack, the minimum that keeps each one under 80%.

Cooling approach

Perimeter cooling with containment

Hot or cold aisle containment becomes necessary. This band covers most enterprise rooms — Uptime put modal density at 11 kW in 2026, up from 9 kW the year before.

Checks

Nothing flagged. The configuration sits inside the electrical and thermal limits this tool checks.

Every formula, constant, and standard behind these numbers is published on the methodology page.

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