⚡ Calculators
Product Capacity Calculator
Calculate the required capacity for generators, transformers, or UPS systems based on connected load, demand factor, power factor, and safety margin.
Calculation Formula
Required kVA = (Total Load × Demand Factor / Power Factor) × (1 + Safety Margin)
Load: Sum of all connected equipment wattage (kW)
Demand Factor: Ratio of actual to total load (typically 60–90%)
Power Factor: Ratio of real to apparent power (typically 0.8–0.95)
Safety Margin: Extra capacity buffer for load growth (10–30%)
Input Parameters
e.g., 100 for a 100kW facility
kW
Typical: 70–85% for commercial
%
Typical: 0.80–0.95 for industrial
PF
Recommended: 20–30% for reliability
%
Recommended Capacity
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Selection Guidance
Industrial Facilities
Use demand factor 70–80%, power factor 0.80–0.85, safety margin 25–30%. Heavy motor loads require higher margins.
Commercial Buildings
Use demand factor 75–85%, power factor 0.85–0.90, safety margin 20–25%. HVAC and lighting are primary loads.
Data Centers
Use demand factor 85–95%, power factor 0.90–0.95, safety margin 30–40%. Redundancy and UPS sizing are critical.
Construction Sites
Use demand factor 60–75%, power factor 0.75–0.85, safety margin 25–35%. Load varies significantly by phase.