Home electricity usage calculators

It is on your interest to find out how much electricity you are using at home. 

– Do you know how much electricity your appliances are consuming? Your fridge, your washing machine, your tumble dryer…

– Do you know how much electricity you are using to illuminate your house? 

– Do you know how much electricity your home devices are consuming? The router that it is powered on 24×7, the PC monitor that it is in stand by mode while not in use, …

If you know how much electricity you are using at home, you can calculate the cost. Once you know the cost, it is easy to calculate how much money you could be saving by reducing your electricity usage.

Effiworkx have made available several calculators that will help you finding out your home electricity consumption.

Fridge electricity usage calculator
Freezer electricity usage calculator
Dishwasher electricity usage calculator
Coffee machine electricity usage calculator
Coffee machine

Lamps and bulbs electricity consumption calculator

Lamp electricity consumption calculator

The easiest way to know how much electricity we are using to illuminate our houses, and the cost, it is to calculate the electricity usage of small units.

For example, if we have a lamp in our living room that has seven bulbs and we know that the lamp it is used an average of 4 hours a day, we can easily calculate the electricity usage and the electricity cost over time.

Another example, if in our bedroom we have 5 bulbs of the same power rating and we estimate that they are powered on 1 hour every day, we can easily find out how much electricity they are using and how much money it is costing us.

Once we know how much we are consuming and the cost, we can also easily figure out how much we would be saving by swapping to more efficient bulbs or by decreasing the usage.

Bulb lumens table

Standby electricity consumption calculator

Many houses have devices that are powered on permanently, for example the router and the fridge.

We all want to have internet available all the time but it is good to be aware of much money it does cost us. 

Once we know the cost, the next time that we need to buy a new router and we have to chose between two models, we will be making sure to buy the one which is using less electricity.

Devices consuming electricity 24x7

In occasions, specially for small devices, we power rating tag is not showing the power consumption is Watts (W) or Kilowatts (kW). But once we know the voltage and current consumption, we can easily calculate the power consumption.


If the know the power consumption, for how long we are using the device every day and how much we are paying to our electricity provide for every Kilowatt hour (kWh) we use, we can calculate the electricity usage and the electricity cost over time.


Devices and appliances electricity consumption calculator

In general, it is simple to calculate our devices and appliances electricity usage and cost over time, we just need to know:

– The device or appliance power rating

– For how long we are using the device or appliance any single day, in average.

– How much we are paying to our electricity supplier for every kWh we are consuming.


This calculator can give you an estimate of the electricity usage and the electricity cost but the most accurate way to find out the consumption of any device or appliance is to use a plug in power meter.

Plug in power meter electricity consumption

Buying an energy efficient appliance: is it worth?

Energy efficient appliances consume less electricity which means that we will be paying less every month on our electricity bills. So far, it sounds good, isn’t it?

What we need to be aware of is that the energy efficient appliances are usually more expensive and we will be paying more for that energy efficient fridge, washing machine, dishwasher,…

The question here is, is it worth to pay that additional money to buy an energy efficient appliance that will be consuming less electricity?

Energy Efficient Appliance

We need to be very careful, because in occasions it is not profitable to buy a more efficient appliance.

This is because it may take many years for the electricity savings to offset the cost of buying that extra efficient appliance.


Reduce your consumption - Save electricity and money

All in all, there are many ways to reduce our electricity usage at home and save money. You just need to know where to look at.

Do you know much electricity (kWh) do your household consume? Ours does consume an average of 2700 kWh every year.

Our home electricity consumption in kWh

If you know your yearly electricity usage you can also find out if your consumption is average when compared to your region or country. 

Find out how much you can save, for example, by reducing your heating consumption or by reducing your household consumption by 10%, 20% or even more.


If you are looking for tips and advice on how to save some electricity, have a look to this video that we have prepared about this very same topic.

Electricity conservation - Save and conserve energy

Energy conservation can be defined as the decision and the act of using less energy 

Energy conservation both benefit you and the environment  

The act of saving and conserving electricity does benefit you because you will be paying less on your energy bills. 

And it also does benefit the environment because conserving electricity prevents any unnecessary waste of natural resources.

Now, at individual level it may not look worth to try to save a few watts here or there. 

Still, every little counts and if hundreds or thousands of us do save a little every time, it will make an important contribution towards conserving our natural resources.


For example, if 9000 households would manage to save as little as 10 Watts per hour (0,01 kWh) worth of electricity per day, that would add to 32850 Kilowatt hour (kWh) per year. 

That is a considerable amount of electricity, but let’s add additional perspectives for clarity:

  • Assuming an average cost of 0,18 euro (or dollars, or pounds, or any other currency) we would collectively be saving nearly 6000 euro per year.
  •  To produce 32850 kWh of electricity it is necessary to use around 17 metric tons of coal or 56 barrels of residual fuel oil.
Have a look to this page for more information about the amount of resources needed to produce electricity.

In any case it is clear that small energy savings do really count when looking into the bigger picture.

We hope that you have found the information on this page informative and of value. 

If so, please consider to share or subscribe to our newsletter.

We dedicate a considerable amount of time and effort to create content and your support and engagement will encourage us to keep moving forward.

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