An LED-lamp with 6 watt, which is used for 750 hours per year, consumes 4,5 kWh.
6W x 750 hours = 4500 Watthours / 1000 = 4,5 kWh
An LED-TV with 100 watt, which is used for 1000 hours per year, consumes 100 kWh.
100W x 1000 hours = 100'000 Watthours / 1000 = 100 kWh
A vacuum cleaner (Staubsauger) with 1400 watt, which is used for 50 hours per year, consumes 70 kWh.
1400W x 50 hours = 70'000 Watthours / 1000 = 70 kWh
An electric bicycle with 500 watt, which is used for 100 hours per year, consumes 50 kWh.
500W x 100 hours = 50'000 Watthours / 1000 = 50 kWh.
This is the calculation:
Watt x Hours = Consumption of Electricity in Watthours / 1000 = Consumption of Electricity in kWh