Calculate how much any appliance costs to run — per day, month, and year. Enter the wattage, hours of use, and your electricity rate to see the true cost. Free and private.
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This utility is a high-performance node optimized for modern browser environments. All data processing is executed client-side, ensuring zero knowledge transfer to external servers.
Multiply the appliance's power (watts) by hours used, divide by 1000 to get kilowatt-hours (kWh), then multiply by your electricity rate. For example, a 1500W heater running 5 hours = 7.5 kWh; at $0.15/kWh that's $1.13 per day. This tool does it instantly and projects monthly and yearly costs.
Your price per kWh is on your electricity bill (often called the 'unit rate' or 'energy charge'). Enter it in the rate field. Typical rates range from about $0.10 to $0.35 per kWh depending on your region.
Check the label on the device or its power supply, or use one of the built-in presets for common appliances. Motors and heaters draw the most; standby devices draw very little.
No. Everything is calculated locally in your browser and nothing is uploaded or saved.