Electricity Cost Calculator

Calculate the electricity cost of running appliances based on wattage and hours

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Power (watts)

Hours per day

Rate ($/kWh)

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.

How to Use Electricity Cost Calculator

1Open the Electricity Cost Calculator tool above - it loads instantly in your browser.
2Enter your data or upload your file. Everything is processed locally on your device - nothing is uploaded to any server.
3Get your results instantly. Copy, download, or share - completely free with no signup required.

Electricity Cost Calculatoris part of BriskTool's collection of free online tools. All tools run entirely in your browser for maximum privacy and speed.