Electricity Cost Calculator
Calculate the electricity cost of running appliances based on wattage and hours
kWh/day
0.80
Cost/day
$0.13
Cost/month
$3.84
Cost/year
$46.72
Frequently Asked Questions
How is electricity cost calculated?▼
Cost = (Watts × Hours / 1000) × Rate per kWh. A 100W bulb running 10 hours at $0.12/kWh costs: (100 × 10 / 1000) × $0.12 = $0.12.
What is the average electricity rate in the US?▼
The US average is about $0.16 per kWh as of 2025, but varies from $0.10 to $0.45+ depending on state.