kWh Cost Calculator
Enter appliance wattage, daily usage hours, and your electricity rate to instantly see daily, monthly, and yearly running costs.
Use the kWh Cost Calculator
Appliance & Usage Details
Found on the device label or spec sheet.
Average hours the appliance runs each day.
Check your latest electricity bill for this figure.
Common Appliance Wattages
Click a row to pre-fill the wattage field.
Fill in the details on the left and click Calculate Cost to see your results.
Daily Cost
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Monthly Cost
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Yearly Cost
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Energy Consumption Breakdown
Cost Comparison
Summary
The kWh Cost Calculator helps you estimate the electricity cost of running any appliance or device. Simply enter the appliance wattage (found on the label or manual), how many hours per day you use it, and your electricity tariff in cost per kWh. The calculator instantly shows your daily, monthly, and yearly energy costs so you can make informed decisions about energy usage and identify opportunities to reduce your electricity bill.
How it works
- Enter the appliance wattage in watts (W) — found on the device label or spec sheet.
- Enter how many hours per day the appliance is typically running.
- Enter your electricity rate in cost per kilowatt-hour (kWh) from your utility bill.
- The calculator converts watts to kilowatts, multiplies by daily hours to get daily kWh consumption.
- Daily kWh is multiplied by your rate to produce a daily cost, then scaled to monthly (30 days) and yearly (365 days) figures.
Use cases
- Estimate the running cost of air conditioners, heaters, and refrigerators.
- Compare energy costs before buying a new appliance.
- Identify high-consumption devices that are inflating your electricity bill.
- Calculate potential savings from switching to a more energy-efficient model.
- Budget monthly electricity costs for a home office or workshop.
- Determine payback period for energy-saving upgrades.
- Audit energy usage across multiple devices in a facility.
- Educate students about power, energy, and cost relationships.