Cost Calculators | Guernsey Electricity

Tariffs are changing from 1 July 2025. Click to find out more. 

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Cost Calculators

How much do things cost to run?

Got your energy bills ready? See how much costs compare to run heating, vehicles and appliances in Guernsey
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How do heating costs compare? 

Heating a property has both cost and carbon implications. Use our calculator below for an idea of how your current usage of gas or oil would compare if you switched to electric heating both in terms of the price you'll pay and the volume of greenhouse gas emissions your property produces. 

 

 

  • Gas heating

    Your gas bill is presented in kWh, making it directly comparable to electricity. The efficiency of your gas boiler is also incorporated into the units confirmed on your gas bill. 

    Gas boilers are always less than 100% efficient and become more expensive to run over time as efficiency decreases. If your boiler is over 10 years old, it may be worth considering an upgrade. 

    Find the latest gas prices on Guernsey Energy's website

    Gas prices
  • Oil heating

    Your oil bill reflects the number of litres purchased before using the heating system - it doesn't consider the efficiency of your oil boiler or the conversion to kWh. We have included an option to compare costs depending on the age of your boiler as oil boilers cost more to run as they age. Plus, an in-built conversion to kWh will make it directly comparable to electricity. Please check your oil provider's website for the latest oil price. 

    Efficiency: -10 years: 90%, 10+ years: 80%. Conversion factor: 10.35 

    Oil prices
  • Electric heating

    Unlike oil and gas, electric boilers are practically 100% efficient and remain so throughout their lifetime. This is because the power needed to heat your home arrives ready-to-use and nothing needs to be burnt in your property to produce heat. 

    The prices used in this calculator can be found in the Superheat and Heat Pump section of our tariffs page.  

    Our carbon emission data can be found here

     

     

    Electric prices
  • Cost to run heating in Guernsey

    Use your current heating bill to compare costs

    Compare From

    Compare To

    Fuel Energy Consumed (kWh) Annual cost Annual carbon emissions
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    {{compToName}} {{displayNum(toUnits)}} £{{displayNum(toCost)}} {{displayNum(toEmissions)}} KgCO²e
    You Save £{{displayNum(saveAmount)}} {{displayNum(saveEmissions)}} KgCO²e
boiler efficiency explained

How does an inefficient boiler cost you money? 

Boiler efficiency

Cost Calculators

Are vehicles expensive to run in Guernsey?

With our short commutes, you may be right to think it doesn't cost much to run vehicles here. But just how do the costs compare? Electric vehicles are the cheapest vehicle to run in Guernsey - see just how much less using our calculator.
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An EV driver can enjoy a much cheaper commute than the petrol or diesel driver next to them. And cost isn't only measured in money - the cost to our planet in terms of carbon emissions also needs to be considered.

  • Electric Vehicle Cost Calculator

    Select Tariff

    Select Distance Travelled (Km)

    Cost to run

    £{{evCost}}

    Carbon emissions

    {{evEmissions}} KgCO2e*

  • Petrol / Diesel Cost Calculator

    Fuel Type

    Select Distance Travelled (Km)

    Please enter price per litre

    Cost to run

    £{{fuelCost}}

    Carbon emissions

    {{fuelEmissions}} KgCO2e*

Cost Calculators

How much do your appliances cost to run?

Our handy tool will give you a good idea of how much it costs to run your home appliances and when it's cheapest to use them (spoiler - it's during Super Economy 12 low-rate times!)
Check electricity prices

 

The cheapest, cleanest time to run appliances is between 11pm and 5am. Find out how much your appliances cost to run using our calculator. 

Calculator

Energy Calculator

How much does it cost you to use your appliances? Use our calculator to find out.

All appliances have a rating which indicates how much energy it uses. This is usually found on the base of the appliance or just inside the door on larger items, either written in Watts (W) or Kilowatts (kW). If it is in kW, multiply the figure by 1,000 and then enter into the calculator.

The age of your appliances may impact how much they cost you to run, therefore please be as accurate as possible with how long your appliances run for. 

Your statement will tell you what type of tariff you are on. Click here to see where to find this.

Here are some example ratings for typical appliances used in the home. 

Dishwasher 1500
Tumble Dryer 2500
Washing Machine 2500

 

See more appliance ratings here

*This calculator cannot be used for heating systems or appliances that use our Superheat Tariff.

Results reflect the updated tariffs.

  • Energy Calculator

    Normal Rate

    £{{economyStd}}

    Cost Per Week

    £{{economyStdWeek}}

    Total cost over a 12 week billing period

    £{{economyStdBill}}

    Low Rate

    £{{economyLow}}

    Cost Per Week

    £{{economyLowWeek}}

    Total cost over a 12 week billing period

    £{{economyLowBill}}

    Standard Rate

    £{{standard}}

    Cost Per Week

    £{{standardWeek}}

    Total cost over a 12 week billing period

    £{{standardBill}}