calcs.homes
calcs.homes
Find out what an appliance actually costs to run — enter its wattage, hours of use, and your electricity rate to get daily, monthly, and yearly cost.
Estimate only — actual rates often include fees and tiered pricing.
We divide wattage by 1,000 to convert to kilowatts, multiply by hours used per day to get daily kWh, then multiply by 30 for a monthly estimate and by 12 more for a yearly one. Multiplying kWh by your utility's rate per kWh gives cost — a 1,500 W space heater run 3 hours a day works out to about 135 kWh and $21.60 a month at 16¢/kWh.
A flat 30-day month and a single flat rate keep the comparison simple and consistent across appliances, but real bills are rarely that clean — most utilities add fixed monthly service fees and many use tiered or time-of-use pricing that raises the marginal rate as usage climbs. Pulling your actual rate per kWh from a recent bill, often labeled "energy charge" or "supply rate," gets you the closest match to your real cost.
Check a recent utility bill for your rate per kWh — it's often listed as "energy charge" or "supply rate." The US average is around 16¢/kWh, but rates vary widely by region and season.
It depends on wattage and hours of use — a low-wattage device run briefly costs pennies, while a high-wattage appliance like an electric dryer or space heater run for hours can add up quickly. Enter your appliance's numbers above for a specific answer.