The watt (W) is the basic unit of measuring power – it’s the rate at which an appliance is consuming energy at given time. Electrical appliances and lighting all draw a certain number of watts to operate.
A watt-hour (Wh) is one watt of power used for one hour – the accumulated consumption over a period of time. The following terms are used for multiples of these units:
|kilowatt hour||kWh||1,000 watts used for one hour|
|megawatt||MW||1,000 kilowatts or 1,000,000 Watts|
|megawatt hour||MWh||1,000 kilowatt hours or 1,000 kilowatts used for one hour|
You pay for electricity usage in kilowatt hours (kWh).
Gas consumption is calculated in joules.
The following terms are used for multiples of this unit:
|MJ||megajoule||1 million joules|
Your gas account will show your gas consumption in MJs.