How much does an electric kettle cost to run?

A standard US electric kettle draws 1,500 watts. Boiling a liter of water takes about five minutes. That's 0.125 kWh per boil. At the US residential average of 18.05¢/kWh from the EIA Electric Power Monthly, each boil costs $0.023.

For a single cup, maybe 300 mL, the kettle finishes in about 90 seconds. That drops the cost to under a penny. If you fill the kettle to the max line every time, you're paying for water you don't use. Boil only what you need.

If you have ever watched a British person boil water, you noticed it took about two minutes. A typical UK kettle draws 3,000 watts on a 240-volt/13-amp circuit. In the US, a standard wall outlet delivers 120 volts on a 15-amp breaker. That caps any single appliance at about 1,500 watts. Same physics, half the power, roughly double the wait.

That's why many Americans heat water in the microwave instead. It's not that microwaves are faster. A 1,200-watt microwave takes about the same five minutes to bring a liter to a boil. But most US kitchens already have one, and nobody had to buy a separate appliance.

The 2,400-watt and 3,000-watt kettles you see in UK product reviews won't work on a standard US outlet. Ignore them unless you're wiring a dedicated 240-volt circuit, which costs more in electrician fees than a lifetime of kettle electricity.

Cost per liter of boiling water, all at the same 18.05¢/kWh rate:

Electric kettle (1,500W, 5 min): 0.125 kWh per boil. Cost: $0.023.

Electric stovetop burner (1,500W, ~8 min): 0.200 kWh per boil. Cost: $0.036. The burner runs longer because an open pot loses heat from the sides and top. A lid helps, but the kettle still wins because the water is fully enclosed and insulated.

Microwave (1,200W, ~5 min): 0.100 kWh per boil. Cost: $0.018. Close to the kettle, and slightly cheaper per liter because microwaves heat the water molecules directly instead of warming a metal element first. The trade-off is uneven heating and no temperature control.

The kettle is 36% cheaper than the stovetop per boil. If you boil water three times a day on an electric burner, switching to a kettle saves about $14 a year. The $30 Hamilton Beach 40880 pays for itself in just over two years on electricity savings alone.

All figures below assume a 1,500-watt kettle, a five-minute boil per cycle, and the US average rate of 18.05¢/kWh.

1 boil per day: 45.6 kWh per year. Cost: $8.23.

3 boils per day: 136.9 kWh per year. Cost: $24.71.

5 boils per day (tea enthusiast): 228.1 kWh per year. Cost: $41.18.

For context, a wifi router running 24/7 at 10 watts uses 87.6 kWh a year and costs $15.81. One daily kettle boil uses about half the annual energy of a device you never turn off.

The same 1,500-watt kettle at one boil per day (45.6 kWh/year) costs 3.56 times more in the most expensive state than the cheapest.

Louisiana (11.5¢/kWh): $5.25 a year.

Texas (14.5¢/kWh): $6.61 a year.

US average (18.05¢/kWh): $8.23 a year.

New York (22.85¢/kWh): $10.42 a year.

California (31.2¢/kWh): $14.23 a year.

Hawaii (41¢/kWh): $18.71 a year.

Even in Hawaii, five boils a day costs $93.53 a year. The electric kettle stays cheap everywhere. To run the math at your exact rate and usage, use the electric kettle calculator.

Variable-temperature kettles like the Cuisinart CPK-17 and similar models offer a keep-warm feature that holds water at your target temperature after the initial boil. The element cycles on and off at low power, drawing 50 to 100 watts while it holds.

Left in keep-warm mode for two hours a day, that adds 36.5 to 73 kWh a year: $6.59 to $13.17. At the low end, the keep-warm feature nearly doubles your annual kettle cost versus a single daily boil. At the high end, the keep-warm draw exceeds the boiling cost entirely.

If you boil once, pour, and unplug, the kettle is one of the cheapest appliances in the house. If you leave it holding temperature for hours, you're paying for an appliance that's always on. The simplest fix: boil when you need it, pour immediately, and switch it off.

One kettle boil produces a full liter of hot water. Steep tea bags in it for five minutes, pour over ice in a pitcher, and you have iced tea for $0.023 in electricity. A Keurig brewing four individual cups of iced coffee across an afternoon uses about 0.6 kWh at 1,500 watts with four separate heat-up cycles, costing about $0.11.

The kettle-and-pitcher method uses 79% less electricity per batch than repeated single-serve brew cycles. For households that drink iced tea or cold brew all summer, the electric kettle is the cheapest way to start with hot water.

The microwave running cost breaks down the appliance most Americans use instead of a kettle. For broader kitchen costs, see the coffee maker cost guide and the Instant Pot running cost. The oil-filled radiator post explains the same US 120V/15A circuit limit in the context of heaters.

To see how your state's rate compares to the national average and what that means for every appliance in your home, see electricity rates by state.