Calculate Volt-Amperage Requirements

About this task

To determine the size of UPS that you need:


  1. Locate the voltage and amperage requirements for each piece of equipment.

    These numbers are usually found on a sticker on the back or bottom of your equipment.

  2. Multiply the numbers together to get Volt-Amperes (VA):

    VA = Volts x Amperes

  3. Add the VA from all the pieces of equipment together to find the total VA requirement.

    To determine the minimum volt-amperage requirements for your UPS, we recommend that you add 30% to the total.