Electricity Cost Calculator
Calculate how much any appliance or device costs to run per hour, day, month, and year. Enter wattage, hours of use, and your electricity rate.
$ / kWh
Check your bill for your local rate. US avg: $0.12–0.16 · UK avg: £0.25
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Check your electricity bill — it usually lists the rate in cents or pence per kWh (kilowatt-hour). In the US, the average is around 12–16 cents/kWh. In the UK it's around 25–30p/kWh. Enter your exact rate for the most accurate results.
A kWh is the unit of electricity consumption. It equals running a 1,000-watt device for 1 hour. A 100W bulb running for 10 hours uses 1 kWh. Your electricity bill charges you per kWh consumed.
The CO₂ estimate uses an average grid emission factor of 0.233 kg CO₂ per kWh (the UK 2023 average). This varies by country and energy mix — countries with more renewables have lower emissions per kWh.