1 Watts = Kilocalories per hour: 10 Watts = Kilocalories per hour: 2500 Watts = Kilocalories per hour: 2 Watts = Kilocalories per hour: 20 Watts = Kilocalories per hour: 5000 Watts = Kilocalories per hour: 3 Watts = Kilocalories per hour: 30 Watts = Kilocalories per hour: 10000 Watts = Kilocalories per .