How to Calculate U P S Sizing

What is U P S Sizing?

A UPS (uninterruptible power supply) sizing calculator determines the required capacity to support IT equipment for a target backup duration. UPS capacity (VA) = total equipment wattage ÷ power factor (typically 0.6–0.8). Runtime decreases as load increases; doubling the UPS capacity roughly doubles runtime.

Step-by-Step Guide

1Input base values
2System computes results

Worked Examples

Input

Enter the required values

Result

Result computed by the formula

Common Mistakes to Avoid

✕Precision loss
✕Ignoring variables

Frequently Asked Questions

What does this calculator do?

Input base values

How do I use this calculator?

System computes results

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