How to Calculate KWh
There is something fun and mysterious about numbers. Top Tens and Worst Fives and Forty Ways of leaving your lover are sure to get the attention of the average human being. But throw in complex equations like Riemann’s hypothesis or Birch and Swinnerton-Dyer conjecture and the interest just disappears, except for a select few.
Understanding facts about energy is pretty much the same for the average human. Energy (kWh) = power (kW) x time (h) takes a lot more time to grasp than this sentence: 1 kilowatt-hour (kWh) = the amount of electricity required to burn a 100 watt light bulb for 10 hours. Both of them explain the kilowatt hour, the basic measurement of power commonly used today. Use the KWh calculator below.
Let’s take a look at global energy facts by the numbers:
In less than 1 hour, the sun radiates more energy onto the earth than humans use in one year.
Around 2 billion people worldwide are without electricity.
Manure-to-energy biogas projects can power up to 3% of North America’s needs.
10 million terra-watt hours of electricity per year can be potentially generated by ocean energy.
20% of the world’s electricity is provided by hydropower.
Lighting consumes 25% of the total energy used in homes.
If energy use and efficiency is improved by 10% in commercial and industrial buildings, it would be equal to taking 30 million cars off the road, in terms of reduction in greenhouse gases emissions.
In 50% of US territory, wind energy can be harnessed.
More than 70% of the electricity in US is generated by non-renewable resources.
90% percent of the energy used to power a bulb generates heat; only 10% is needed to generate light.
Coal is mined in over 100 countries worldwide, including the US, Australia, China, Brazil, Kazakhstan, Poland, and Ukraine among others.
About 150 years ago, wood supplied 90% of people’s energy needs.
200 existing biopower plants provide electricity for 1,500,000 American homes.
Australia imports 240 million tones of coal every year.
The US has 250 gigatons reserves of coal.
Oil was formed over 300 million years ago.
Europe is working to achieve its goal of 500 million square meters of installed solar collectors by 2020.
More than 700 pounds of coal is needed to power a single 100-Kw bulb for 24 hours nonstop for a year.
About 1000 homes can be powered by one megawatt.
Coal takes 1 million years to be created.
I’ve found a widget online that will help you calculate your KWh’s into cost based on your electricity charges from the utility company:
The Information Age has given us the means to acquire and access global facts and numbers. It is fascinating to know the world’s oil production in 2005 (almost 74 million barrels per day, an all-time high) when a hundred years ago nobody measured how many joules was consumed by starting the stove.
These numbers paint a clear picture of the global energy situation for everyone to see, hear, and understand. It does not require a university degree for a person to be informed in environmental and global issues. And this simply means that everyone can be involved and take part in energy conservation efforts.
Everyone can do their part to change the numbers.
Photo Credit: Some rights reserved by e y e / s e e on Flickr.
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