Honestly, it depends on the context. If you are talking utility billing of energy (kWh) and trying to convert to kW, there is a load factor involved and the formula is more complicated.
from what you say, if i have 1388 KWh for one billing period and ANYTHING is running 24/7 i would do 1388/(24*28days)? if that, the answer sould be 2.0472 kw per hour for that billing period?
Basically If a pump is rated 5 KW it means it will consume 5 KW per hour if runs continuously. Then it becomes KWH. The meter reading says 5 Units which means 5KWH