UPS VA Rating Calculator

How UPS VA Rating works

This worksheet evaluates VA = watts ÷ power factor. UPS VA Rating uses Load power, Load power factor to report Required UPS rating.

With the loaded values, required UPS rating evaluates to 1,125.00 VA. Hold the remaining entries steady while testing an uncertain input. Use Electricity Tariff Calculator as the follow-up for electricity charge.

Inputs for UPS VA Rating

Load power and Load power factor belong to UPS VA Rating. Keep source units with load power.

The sample case is a worked example, not a design target.

Load power

Example entry: 900 W.

Load power factor

Example entry: 0.8.

Reading the UPS VA Rating result

This output represents UPS VA Rating.

Compare the output with equipment limits and the applicable design margins.

Measurement and units

Keep tariff periods, demand intervals, meter ratios, and measurement bandwidth consistent with the question being answered. Check prefixes on load power.

Record conversion choices so comparisons stay traceable.

Limits of this calculation

Add expansion and transient margin as appropriate.

Only the stated inputs participate in this simplified model. Unentered effects remain outside UPS VA Rating.

A useful UPS VA Rating comparison

Save the initial required UPS rating before adjusting load power. A low and high case is more informative than adding an unexplained safety factor after the calculation. If the next question concerns uPS power loss, open UPS Efficiency Loss Calculator.

Document the alternate load power source.

Questions about UPS VA Rating