Electricity Cost

Calculate electricity costs online for free. Enter wattage, hours of use, and electricity rate to estimate daily, monthly, and yearly energy costs.

Runs entirely in your browser — files never uploaded

Device Wattage (W)

Hours per Day

Rate ($/kWh)

Common Appliances

$0.01Per Hour

$0.10Per Day

$2.88Per Month

$35.04Per Year

24.00 kWhkWh / Month

292.00 kWhkWh / Year

How to use Electricity Cost

1. Enter wattage. Type the wattage of your device, or pick a common appliance preset.
2. Set usage hours. Enter how many hours per day you use the device.
3. Adjust your rate. Enter your electricity rate in dollars per kWh (default is $0.12).
4. Read your costs. Instantly see costs per hour, day, month, and year along with energy consumption.

Where do I find my electricity rate?

Check your utility bill — it lists a per-kWh charge. In the US it typically ranges from $0.10 to $0.30/kWh.

Are the monthly estimates accurate?

They assume consistent daily usage for 30 days. Real bills vary with seasonal usage, tiered pricing, and demand charges.

Does this include standby power?

No. Most electronics draw a small amount of power even when off. You can estimate standby cost by entering 1-5 W as the wattage.