Question: how much electricity does hot tub use?
Answer: Estimate how many hours per month you use the hot tub and multiply that number by the number of kilowatts the hot tub uses. For example, 30 hours a month multiplied by 7.5 kW is 225 kilowatt-hours per month. At 11 cents per kilowatt-hour, the hot tub costs about $25 in electricity per month and $300 per year.