How much does a rice cooker cost to run?

A rice cooker draws between 300 and 1,000 watts, depending on its size. A small 3-cup model runs around 300 to 400 watts. A standard 5.5-cup cooker, the most common kind, sits near 500 watts. The Zojirushi NS-TSC10 pulls 680 watts, the Tiger JBV-A10U about 570, and a big 20-cup Aroma unit for a rice-heavy household reaches 830. The wattage on the label is what the heating element draws while it is actively boiling.

The label wattage is not what runs the whole time, though. A rice cooker heats hard to bring the water to a boil, then the thermostat cycles the element on and off to hold a simmer, and finally it drops to a low trickle to keep the rice warm. Across a full cook cycle, the element is actually energized less than half the time it is switched on. The rice cooker calculator page uses a 40% duty cycle to reflect that mix of hard boil, cycling simmer, and warm hold. The cost figures below all use that 40% average.

Take the common 500-watt cooker. Running it through one full cook and warm-to-dinner cycle, roughly 40 minutes of active heating at the 40% duty cycle, uses about 0.14 kWh. At the national average of 18.05¢/kWh, that's about 2.5 cents per pot. Cook rice once a day and the cooker uses roughly 4.2 kWh a month, or about 76 cents. Over a year that's about 51 kWh, or $9 at the national average.

Your state rate moves that yearly number more than the cooker itself does. Cooking rice once a day for a year costs about:

Louisiana at 12.44¢/kWh: $6 a year. Texas at 14.8¢: $8. National average at 18.05¢: $9. New York at 24.4¢: $12. California at 33.75¢: $17. Hawaii at 39.89¢: $20. The full state-by-state rate breakdown covers all 50 states and DC with current 2026 residential rates.

A household that cooks large batches every day, closer to an hour of active heating, roughly doubles those numbers to about $13 to $18 a year at the national average. Even the heavy-use case stays cheaper than most single appliances in the house.

No. A rice cooker is one of the smallest recurring loads in the kitchen. The $9 a year a daily user spends on it is less than a single dinner out, and a fraction of what the refrigerator or air conditioner in the same room costs in a single week. The reason is timing, not just wattage: the element pulls its full 500 watts only during the few minutes it drives the water to a boil, then it coasts through the rest of the cycle.

The one thing that moves the per-pot number is cook time. White rice finishes in 25 to 30 minutes and costs about 2.5 cents a pot. Brown rice takes almost twice as long, so the element works longer to get there and the pot runs closer to 3.5 to 4 cents. A big 20-cup batch on an 800-watt unit costs more than a 2-cup pot on a 300-watt mini, but even the expensive end of that range stays under a nickel per cook. No version of cooking rice in an electric cooker meaningfully dents a monthly bill.

The keep-warm element draws 30 to 80 watts continuously for as long as the light is on. That sounds tiny next to the 500-watt boil, but it runs for hours instead of minutes. A cooker left on warm from lunch until dinner, day after day, adds 15 to 30 kWh over a year. At the national rate that's $3 to $5 a year spent keeping already-cooked rice warm, which can rival or beat the cost of the actual cooking.

Two habits erase that cost. Switch the cooker off within an hour of the meal and reheat leftovers in the microwave, which uses far less energy for a 90-second reheat than the cooker uses holding warm all afternoon. Or put the cooker on a cheap smart plug set to cut power after an hour, so you never have to remember. Neither change touches how the rice tastes.

A rice cooker is one of the least expensive appliances to run in the kitchen. An Instant Pot lands in the same neighborhood, because pressure cooking finishes fast and then holds a low simmer. A slow cooker draws less wattage but runs for six to eight hours, so a single meal can cost a bit more than a pot of rice despite the lower power draw. Time on beats watts drawn.

The real gap shows up against the big heaters. Cooking rice on an electric stovetop or in the oven pulls 2,000 watts or more and heats a large metal mass and the air around it, not just the pot. A dedicated cooker heats only its inner bowl, which is why it costs a fraction as much per meal. An air fryer follows the same logic: a small, well-insulated cooking chamber is almost always cheaper to run than the full-size range.

Cooker wattage, how long you cook, and your state rate all change the answer. Enter your numbers in the calculator below. For a standard 5.5-cup model, try 500 watts. For a big 20-cup unit, use 800. The methodology follows the DOE formula for estimating appliance energy use: wattage times hours divided by 1,000, priced at your local rate.

A rice cooker sits near the bottom of the appliance cost ranking, so if your bill jumped it's almost never the culprit. The high-bill diagnostic walkthrough covers how to find the appliance that actually moved the number.