Kitchen Appliances
A 1,800 watt dishwasher costs about $0.49 for a 1.5 hour cycle at $0.18 per kWh.
Quick estimate
This uses 1800 watts, 1.5 hours per day, and an electricity rate of $0.18 per kWh.
Dishwasher electricity use depends heavily on water heating and heated drying settings.
Many dishwasher units fall around 1800 watts, with a rough range of 1200 to 2400 watts. Check the product label, user manual, or manufacturer specifications for the most accurate number.
| Estimate | Watts | Hours per day | Daily cost | Monthly cost |
|---|---|---|---|---|
| Low estimate | 1200W | 0.75 | $0.16 | $4.86 |
| Typical use | 1800W | 1.50 | $0.49 | $14.58 |
| High estimate | 2400W | 2.25 | $0.97 | $29.16 |
A dishwasher's electrical use is concentrated in water heating and heated drying, with smaller loads from pumps and controls. Eco, sanitize, and high-temperature options can have very different profiles.
Wattage input
A single peak wattage does not represent the whole cycle. Use an EnergyGuide kWh figure or a meter reading per cycle when available; otherwise treat rated watts across full runtime as a high-side estimate.
Runtime input
Count cycles rather than assuming every minute uses peak power. For this calculator, convert your measured kWh per cycle into equivalent hours at the chosen wattage, or compare normal and heated-dry scenarios.
Convert watts to kilowatts, multiply by the number of hours used, then multiply by your electricity rate.
Cost = Watts / 1000 x Hours Used x Electricity RateFor this dishwasher example: 1800 / 1000 x 1.5 x 0.18 = $0.49 per day.
These details make this estimate more useful for real-world use.
Dishwashers use electricity for pumps, controls, and drying, but water heating can be the biggest part of the energy use. High-temperature wash and sanitize modes may increase the cost of a cycle.
A heated drying phase can add noticeable energy use after the wash is finished. If your dishwasher has air dry or energy saver dry, using that setting can lower electricity use without changing the wash cycle itself.
Run full loads and use air dry or energy saver modes when available.
The easiest way to improve the estimate is to replace the default values with your actual wattage, average runtime, and local electricity rate.
Wattage ranges are practical planning estimates for common household appliances. Actual use can differ by model, age, settings, room conditions, and maintenance.
These authoritative sources support the calculation method, default electricity-rate benchmark, and appliance-specific operating context. The wattage range remains a planning estimate; use the nameplate on your own appliance for the most accurate input.
Used to benchmark the rounded default residential electricity rate. Your utility bill remains the best source for your own rate.
Supports the watts-to-kWh calculation method and the recommendation to check the appliance nameplate or use a power meter.
Provides efficiency and cycle-energy context for residential dishwashers.
It can reduce the dishwasher's direct electrical use because the drying heater is avoided or shortened. Actual savings vary by model and program, and dishes may take longer to air-dry.
A 1,800 watt dishwasher costs about $0.49 for a 1.5 hour cycle at $0.18 per kWh.
Use the wattage printed on the appliance label when possible. As a starting estimate, this page uses 1800 watts and shows a common range of 1200 to 2400 watts.
Electricity bills include many appliances, fees, taxes, seasonal changes, and utility rate structures. This calculator estimates appliance energy cost only.
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