All prices calculated by the Smart Meter are run through the site's Consumer Focus-accredited energy price database.
Graham Self, director at UKPower.co.uk, said the tool can help to provide consumers with "information to challenge suppliers", with concerns recently raised about energy suppliers increasing Direct Debit payments, adding they "can track costs for their specific usage".
He added: "This will help consumers to budget more effectively as they will be able to monitor energy costs rather than waiting for bills to come through the door."
The free Smart Meter tool is available to consumers at http://smartmeter.ukpower.co.uk.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.