Dishwasher Electricity Cost Calculator
Calculate exactly what your dishwasher adds to your electricity bill, cycle by cycle and year by year.
Annual Cost by Dishwasher Type
Based on $0.16/kWh, 5 cycles/week, no heated dry
| Type | kWh/Cycle | Cost/Year | +Heated Dry |
|---|---|---|---|
| ENERGY STAR (2020+) | 1.2 | $50 | $67 |
| Standard modern (2015–2020) | 1.5 | $62 | $79 |
| Standard (2010–2015) | 1.8 | $75 | $92 |
| Older (2005–2010) | 2.2 | $92 | $108 |
| Pre-2000 model | 2.5 | $104 | $121 |
Frequently Asked Questions
How much electricity does a dishwasher use?
A modern ENERGY STAR dishwasher uses 1.2–1.8 kWh per cycle. Older models use 1.5–2.5 kWh. The heating element for hot water and drying is the biggest draw — typically 1,200–1,800W. Running 5 cycles/week at the US average rate costs roughly $50–$75/year. Heated dry adds 0.3–0.5 kWh per cycle.
Is it cheaper to wash dishes by hand or use a dishwasher?
Dishwashers are nearly always more efficient. Handwashing a full load can use 20+ gallons of hot water; an ENERGY STAR dishwasher uses 3–4 gallons. The water heating cost for handwashing often exceeds the total energy cost of running a dishwasher. Studies consistently find dishwashers use 50–70% less energy and water than handwashing the equivalent load.
Does the heated dry setting use a lot of electricity?
Yes — heated drying adds 0.3–0.5 kWh per cycle (20–30% more energy). Air drying or using the sanitize cycle without heated dry is free. Simply opening the door slightly at the end of the cycle allows steam to escape and dishes air-dry in 20–30 minutes. Over a year, disabling heated dry can save $12–$25.
Should I run the dishwasher every day or wait for a full load?
Always wait for a full load — a dishwasher uses the same energy whether half-full or completely full. Running it every other day instead of daily cuts your annual dishwasher energy use in half. A full load is more water and energy-efficient than two half loads. Exception: some dishwashers have half-load settings that adjust water use.
How old should a dishwasher be before replacing it?
Dishwashers typically last 10–15 years. A 2010-era dishwasher uses about 1.8 kWh/cycle; a new ENERGY STAR model uses ~1.2 kWh — 33% less. At 5 loads/week, replacing a 2010 model saves about $16/year — modest, so replacement makes sense when the appliance breaks rather than proactively unless your current unit is pre-2000 (2.5+ kWh/cycle).