To calculate KVA, which of the following formulas is correct?

To calculate KVA (kilovolt-amperes), the correct formula involves multiplying the voltage by the amperage and then dividing by 1000. This approach acknowledges that KVA is a measure of apparent power in an electrical system, and the conversion to KVA from the product of voltage and amperage is necessary because KVA is expressed in thousands (the prefix 'kilo' denotes a factor of one thousand).

When voltage and current are multiplied, the resulting value is in volt-amperes (VA). Since KVA is a larger unit, this value must be divided by 1000 to convert it to KVA.

This understanding forms the basis of electrical calculations, ensuring proper sizing of transformers and generators, as well as safe and efficient circuit design. The other formulas provided do not follow this convention, leading to incorrect calculations for KVA.