Electricity Cost Calculator
Enter the wattage of an appliance, how many hours a day you use it, and your electricity rate to see the daily, monthly, and yearly cost. Choose from common appliance presets — refrigerator, air conditioner, washing machine, and more — to get an instant estimate without looking up wattage.
All calculations run in your browser. No data is sent anywhere.
By The Paper Room Editorial Team — Calculator Tools
Frequently asked questions
How is the electricity cost calculated?▼
The formula is: cost = (watts / 1000) x hours per day x number of days x rate per kWh. The tool shows this for daily, monthly (30 days), and yearly (365 days) periods.
Where do I find my electricity rate?▼
Your rate per kWh is on your electric bill, usually under a line item like 'energy charge.' In the US, the average residential rate is around $0.12-0.16 per kWh, but it varies widely by state and provider.
Are the appliance wattages accurate?▼
The presets use typical average wattages. Actual consumption varies by model, age, and usage pattern. Check the label on your appliance or its manual for the exact rating.
Does this account for standby power?▼
No. This calculator estimates cost based on active usage only. Many appliances draw a small standby load when turned off but plugged in, which is not included here.