Electricity Cost Calculator

This tool converts electricity use into money at the price you actually pay. The first mode takes an appliance rating in watts, how long it runs each day and your price per kilowatt hour, and returns the cost per hour, per day, over the period and over a year. The second takes a meter reading in units with any fixed standing charge and returns the bill and the true average cost per unit once that charge is spread across it. You supply the price per kilowatt hour rather than picking a region, because tariffs vary by supplier and time of day and any built-in rate would be wrong for most people.

Calculator Type
The rating plate figure. A 1.5 kW heater is 1500 watts.
Take it from your bill. It is usually between 0.10 and 0.40.
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For something that draws two different wattages over a day: a desktop sitting at the login screen and then rendering, a fridge cycling, a router idling beside a games console under load. One figure for each state, and the two are costed together.

What it pulls while switched on and doing nothing. Measure it if you can; rating plates give the maximum, not the idle figure.
Take it from your bill. It is usually between 0.10 and 0.40.
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One unit is one kilowatt hour.
Standing charge, service fee or meter rental. Leave at zero if your tariff has none.
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