Electricity Cost Calculator
Calculate the daily, monthly, and annual cost of running an electrical appliance.
Input Parameters
Enter details for calculation.
Estimated Monthly Cost
Expert Tip
Unplugging standby electronics (phantom loads) can save the average household $100 to $200 a year on electric bills.
Calculation Methodology & Details
Formula
Converts watts to kilowatt-hours, scales to a monthly 30-day baseline, and multiplies by utility rates.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional advice or diagnostic validation. Always consult a qualified specialist.
How Electricity Cost is Calculated
Follow these steps to complete the calculation:
Input Power
Enter appliance consumption in Watts (W).
Specify Runtime
Enter average daily use hours.
Related Tools
Detailed Insights & Expert Guide
ℹ️ About this Calculation
Understanding your home's energy consumption is the key to lowering utility bills and reducing carbon footprints. This calculator estimates the monthly and annual cost of running various household appliances based on wattage, usage hours, and your local electricity rate.
Variable Glossary
Appliance Wattage
The power rating of the device in watts (W) or kilowatts (kW).
Hours Used per Day
The average time the appliance is active each day.
Electricity Rate
Your local utility cost per kilowatt-hour (kWh), typically measured in cents or dollars.
How to Calculate Step-by-Step
Step 1
Find the wattage label on your appliance (e.g. 500W). Divide by 1,000 to convert to kilowatts (0.5 kW).
Step 2
Multiply the kilowatts by the number of hours the device runs per day to find daily kWh usage.
Step 3
Multiply daily kWh by your electricity rate to get the daily cost.
Step 4
Multiply by 30 to estimate the monthly cost.