Plan rack capacity with confident electrical numbers. See kW, kVA, amps, and heat output instantly. Export reports for designs, bids, reviews, and approvals quickly.
| Scenario | Racks | Avg Rack (kW) | Utilization | Diversity | Growth | Redundancy | Power Factor | Voltage | Phase |
|---|---|---|---|---|---|---|---|---|---|
| Edge Room | 6 | 3.5 | 70% | 0.95 | 10% | 1.05 | 0.95 | 208 | 3 |
| Enterprise Pod | 20 | 6.0 | 65% | 0.90 | 20% | 1.10 | 0.95 | 400 | 3 |
| High Density Row | 12 | 12.0 | 60% | 0.85 | 25% | 1.15 | 0.92 | 480 | 3 |
Accurate IT load planning starts with realistic rack assumptions. This calculator multiplies rack count by an average rack demand, then applies utilization and diversity to represent typical operating behavior. Growth allowance and redundancy translate business continuity targets into electrical capacity, helping you size feeders, panels, and upstream distribution with consistent logic.
Average rack load, utilization, and diversity usually drive the largest swings. A modest change in utilization can shift total kW more than adding one or two racks. Diversity factors below one reduce coincident peak demand, while redundancy multipliers raise the final requirement to match N+1 or similar approaches. Power factor affects kVA and current, so keep it aligned with equipment specifications.
The calculator converts final kW to kVA and current using your selected voltage and phase. These outputs support preliminary conductor sizing, breaker selection, and equipment schedules. Use the facility power estimate from PUE to check utility service capacity and generator sizing, since non‑IT loads such as cooling, lighting, and auxiliaries often dominate total site demand.
Nearly all IT power becomes heat within the white space. Heat rejection is reported in BTU/hr and converted to tons of cooling for quick HVAC coordination. Treat the cooling number as a planning indicator; actual system selection should consider airflow strategies, containment, allowable temperature ranges, and partial-load performance of cooling equipment.
Use the CSV and PDF exports to capture assumptions at each design milestone. Record the rack model, expected utilization profile, diversity rationale, and the redundancy objective agreed with stakeholders. Keeping a consistent assumptions log reduces rework during value engineering, commissioning, and capacity audits, and supports transparent change management when loads grow. Capture diversified and nondiversified values, plus voltage and phase. These details help electricians, commissioning agents, and owners validate capacity over time, and simplify future rack adds or tenant changes without restarting the entire sizing process.
Nameplate is racks times average rack demand. Final IT load adds utilization, diversity, growth allowance, and redundancy so the result reflects realistic operation and required headroom.
Use it when not all racks peak at the same time, such as mixed workloads, staggered batch jobs, or multiple tenants. Keep it conservative unless you have monitoring evidence.
kW is real power, while kVA includes reactive components. Lower power factor increases kVA and current for the same kW, affecting upstream electrical sizing and equipment ratings.
No. It is a quick conversion from IT heat load. Final HVAC sizing must include mechanical design margins, airflow management, climate data, and equipment part‑load efficiency.
Base it on the resilience target, such as N, N+1, or 2N, and how the critical path is distributed. Align it with the electrical one‑line and UPS topology.
PUE is total facility power divided by IT power. Multiply IT kW by PUE to estimate total site demand, including cooling, power conversion losses, and support loads.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.