Question: how much electricity does it cost to mine bitcoin?
Answer: If you run an Antminer 24/7 for a year it will produce about 0.85 bitcoins, at a cost of about 15,000 kilowatt hours. Depending on your power prices it will cost anywhere from $600 (at 3 cents per Kwh) to $1,800 (at 9 cents per Kwh) to mine one coin.