Power protection
UPS Capacity Calculator
Estimate required UPS kVA from load kW, power factor, and a selected headroom percentage.
Systems worksheet
Calculation inputs
kW
%
Calculated result
12.5 kVA
Planning estimateConfirm equipment ratings, manufacturer limits, adopted code requirements, and system-specific calculations before installation.
Method and field check
The estimate converts kW to kVA using power factor and adds headroom. Verify crest factor, bypass, battery autonomy, and manufacturer capacity curves.