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how much does 1w of electricity cost

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  • 26-02-2014 7:53pm
    #1
    baby fish
    Registered Users Posts: 267 ✭✭


    im Trying to compare the cost of running 4 different size fans , without being turned off, over 24hours

    fan sizes:5w, 13 w, 23w , 44w

    anybody know the total cost of 1w for 24hours?


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    #2
    brightspark
    Registered Users Posts: 2,637 ✭✭✭brightspark


    1w for 24hours would be 24x1/1000 units
    = 0.024 units

    @approx 19c per unit (depends on your supplier etc)

    = 0.456 cent


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    #3
    coylemj
    Registered Users Posts: 25,458 ✭✭✭✭coylemj


    1 watt for 24 hours would consume 0.024 of a kWh, that's based on kilowatts (0.001) multiplied by hours (24). Check your last bill to see how much a kWh costs, add 13.5% VAT, multiply by 0.024 and there's your answer.

    My last Bord Gais bill says 16.28c per unit so including VAT that's 18.48c meaning that your 0.024 kWh would cost 0.44c.


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