LoadCairn / Free planning tools

Engineering calculators

Use these free tools for critical-facility planning. Estimate UPS runtime, cooling load, and rack power against PDU capacity.

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UPS battery runtime

Estimate runtime from load, battery-bank configuration, UPS efficiency, and remaining capacity.

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Cooling load & BTU

Estimate cooling load from IT demand, lighting, people, and a user-supplied building-envelope heat gain.

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Interactive calculator

Rack power & PDU capacity

Compare rack real-power load with estimated single- or balanced three-phase PDU capacity.

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