What is an apparent power calculator?

The apparent power calculator is a small tool that helps you quickly calculate the "total electrical energy flow" in a circuit, with units of volt ampere (VA) or kilovolt ampere (kVA). It directly multiplies the effective values of voltage and current, and the formula is S=UI (single-phase) or S=√ 3 × UI (three-phase).
What can it do?
Equipment selection: For example, when selecting transformers or generators, use them to calculate capacity and avoid being unable to move them.
Save electricity costs: Enterprise users are particularly in need, and failure to meet power factor standards may result in fines. It can help you optimize electricity efficiency.
Design: Engineers use it to evaluate circuit loads and ensure safety without overloading.
How to use?
Single phase circuit: Direct transmission of voltage (V) and current (A).
Three phase circuit: multiply multiple √ 3 (approximately 1.732).
for example
Single phase: 220V voltage, 10A current, apparent power is 2200VA.
Three phase: line voltage of 380V, current of 10A, resulting in approximately 6580VA.
Where can I find it?
Online tool: Ampere to VA calculator
Electrician app: such as the "Electrician Calculator" app, with more comprehensive functions