This web page answers your question really well:http://www.powerstream.com/VA-Watts.htm
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So does http://www.wolframalpha.com/ for nearly any conversion. It has become my second most favorite site ever. #1 being Instructables.
Watts and KVA aren't the same, except into a purely resistive load, but 1000 W = 1Kva then.
Divide by 1000. L