Appliance Wattage Cost Calculator Guide

Calculate appliance running cost from wattage, quantity, daily hours, monthly days, and electricity rate.

Use the Appliance Wattage Cost Calculator for heaters, pumps, fans, TVs, computers, chargers, kitchen devices, and other electrical loads.

The formula

Monthly kWh equals watts divided by 1,000, multiplied by quantity, hours per day, and days used. Cost equals kWh multiplied by your electricity rate.

Use real usage, not guesses

The wattage label helps, but usage hours matter just as much. A high-watt appliance used briefly can cost less than a lower-watt appliance running all day.

Best use cases

• Compare two appliances before buying.
• Find the most expensive loads in your home.
• Estimate the impact of longer daily usage.