The units are not interchangeable: a kilowatt is a unit of power, and a kilowatt-hour (one kilowatt applied for one hour) is a unit of energy.
Example:
A 100 watt bulb is, at any given time, using 0.1 kilowatts of energy. Using a 100 watt light bulb for one hour consumes 0.1 kilowatt-hours of electricity. Energy is only used by applying power for a finite period of time.
A mobile phone or a cordless phone generally has a battery rated in milliamp hours, which works out to a small fraction of one kilowatt hour. A conventional landline telephone does not store power at all.
2
1 kilowatt = 1,000 watts 6 kilowatts = 6,000 watts 6 kilowatt-hours = 6,000 watt-hours
A 30-watt bulb uses 0.03 kilowatt-hours every hour, or 30 kilowatt-hours in 1000 hours. To find the kilowatt-hours, multiply 0.03 by the time in hours.
(3 Kw) x (5 hrs) = 15 kilowatt-hours
50 watts is 0.05 kilowatts, so in 24 hours it uses 0.05 x 24 kilowatt-hours, or 1.2 kilowatt-hours of energy.
Kilowatt hours.
The average yearly electrical consumption around the world for those areas that have electricity is 3,500 kilowatt hours. In the United States the average is almost 11,000 kilowatt hours.
35,000 BTU = 10.2574875 kilowatt hours.
8500 BTU = 2.5 kilowatt hours.
Watts does not have a time component to it; so you should have asked, "How many kilowatt-hours does an oven use per hour?' For example, if the oven uses 1600 watts, then in one hour, it would use 1600 watt-hours, or 1.6 kilowatt-hours.
366,000 BTU = 107.264012 kilowatt hours.
$96
There is no such thing as a "kilowatt per hour". Kilowatt is a unit of power, not of energy. A unit of energy is kilowatt-hour. That's kilowatt times hours, not "per" hour ("per" implies division, not multiplication). If a generator produces 10 kilowatts, that means it produces 10 kilowatt-hours every hour.