Dishwashers have become a staple in modern kitchens, offering convenience and efficiency. But do dishwashers use a lot of electricity? Many homeowners ask if this appliance affects their energy bills a lot or if handwashing is a better choice.
No, modern dishwashers do not use a lot of electricity compared to other household appliances. The average dishwasher uses 1,200 to 1,800 watts per cycle, translating to 1.2 – 1.8 kWh per hour. Energy-efficient models can use as little as 200 kWh per year, costing around $2 – $8 per month depending on local electricity rates.
This guide looks at how much electricity dishwashers use. It covers factors that affect energy use and offers tips to save money while improving efficiency.
How Much Electricity Does a Dishwasher Use?
Dishwashers typically consume 1,200 to 2,400 watts per cycle, averaging around 1,800 watts (1.8 kWh) per hour-long load. However, several variables determine the actual energy consumption:
- Dishwasher Model & Age. Older models use more energy. In contrast, ENERGY STAR-certified dishwashers use much less.
- Cycle Selection. Eco and quick wash cycles usually use less electricity than heavy or heated-dry cycles.
- Water Heater Dependency. A big chunk of the dishwasher’s energy usage is for heating water, which often comes from your home’s hot water heater.
- Frequency of Use. Running the dishwasher daily vs. a few times a week impacts electricity costs.
Comparing Dishwasher Electricity Costs
To break down costs, let’s consider the U.S. average electricity rate of $0.13 per kWh:
| Dishwasher Type | Energy Use (per cycle) | Cost per Cycle | Monthly Cost (5 cycles/week) |
|---|---|---|---|
| Older Model (pre-2004) | 2.0 kWh | $0.26 | $5.20 |
| Standard Model | 1.8 kWh | $0.23 | $4.60 |
| ENERGY STAR Model | 1.5 kWh | $0.20 | $4.00 |
A new ENERGY STAR dishwasher can save $20-$30 annually on electricity bills compared to an older model.
Factors That Affect Dishwasher Energy Consumption
1. Heating Element Usage
The heating element is a major factor in how much electricity a dishwasher uses. It heats water to about 120-140°F. If your dishwasher gets hot water from your home, it won’t need to heat as much water itself, which saves energy.
2. Cycle Selection & Load Size
- Eco-mode: Uses less energy by extending wash times while reducing water temperature.
- Intensive mode: Uses more electricity due to higher heat and prolonged wash times.
- Half-load mode: Consumes more energy per dish compared to full loads.
3. Time of Use & Utility Rates
Electricity costs fluctuate based on peak and off-peak hours. Running your dishwasher at night or during off-peak times can reduce energy costs by up to 25%.
4. Dishwasher Age & Efficiency
- Older dishwashers (pre-2004) use up to 800 kWh per year.
- New ENERGY STAR models use less than 270 kWh per year, reducing both electricity and water consumption.
Do Dishwashers Use More Electricity Than Handwashing?
Contrary to common belief, handwashing is less energy-efficient than using a dishwasher. Here’s why:
- Water Efficiency. Dishwashers use 11-13 litres per cycle. Handwashing can use up to nine times more water.
- Energy Efficiency. The energy used to heat water for handwashing is often higher than the electricity consumed by an efficient dishwasher.
- Time and Cost Savings. Using a dishwasher saves time and uses less electricity and water.
Conclusion: If you have a dishwasher, use it! It’s both cost-effective and eco-friendly compared to handwashing.
Dishwasher vs Hand-Washing: Which Is Better for You?
How to Reduce Dishwasher Electricity Usage
Here are some practical tips to make your dishwasher more energy-efficient:
1. Use Energy-Efficient Models
- Opt for ENERGY STAR-certified dishwashers, which use 30% less energy.
- Newer models consume as little as 199 kWh per year, reducing electricity costs.
2. Choose the Right Cycle
- Use Eco Mode or Quick Wash for lightly soiled dishes.
- Avoid Heated Dry; instead, let dishes air dry.
3. Run Dishwashers at Night
- Electricity rates are lower during off-peak hours (9 PM – 7 AM).
- Scheduling cycles at night reduces strain on the power grid and saves money.
4. Fill the Dishwasher Properly
- Avoid overloading or underloading to ensure efficient cleaning and water use.
- Proper stacking maximizes water and detergent distribution.
5. Regular Maintenance
- Clean filters and spray arms regularly to maintain efficiency.
- Check for leaks or faulty heating elements that may increase energy consumption.
How Much Do Dishwashers Cost? (2025 Pricing Guide)
Conclusion: Are Dishwashers Expensive to Run?
No, dishwashers are not major energy consumers compared to appliances like refrigerators or ovens. Running a dishwasher daily costs under $10 per month in the U.S. and £18 in the UK. Additionally, they save water and energy compared to handwashing. To maximize efficiency, choose an ENERGY STAR® model, use eco-mode, and run full loads.
FAQs
How much electricity does a dishwasher use per month?
A dishwasher uses 20–40 kWh per month, depending on the model and frequency of use. ENERGY STAR® dishwashers consume less power, averaging 200–800 kWh per year. Running an efficient dishwasher daily costs around $3–$8 per month in electricity.
How much does it cost to run a dishwasher for 2 hours?
A standard dishwasher running for 2 hours consumes about 2.4–3.6 kWh of electricity. At an average rate of $0.13 per kWh, the cost is $0.30–$0.50 per cycle. Using an eco-mode or off-peak hours can lower energy expenses.
Does a dishwasher save water and electricity?
Yes, modern dishwashers save both water and electricity. Handwashing can use 9× more water, while ENERGY STAR® dishwashers use 3–4 gallons per cycle. They use 50% less energy than older models. This makes them more efficient and saves money.
How much electricity does a dishwasher use per cycle?
A dishwasher uses 1.2–2.4 kWh per cycle, with efficient models consuming as little as 0.8 kWh. This means it costs $0.10 to $0.32 per load. The exact amount depends on your dishwasher’s energy rating and local electricity prices.
How many watts does a dishwasher use per hour?
Dishwashers typically use 1,200–2,400 watts per hour. The average model runs at 1,800 watts, consuming 1.8 kWh per hour. Reducing heated drying and using eco mode can cut electricity usage by up to 30%.
Do dishwashers use a lot of electricity (2021)?
In 2021, standard dishwashers consumed 307–800 kWh per year. Newer ENERGY STAR® models use as little as 199 kWh annually, making them more energy-efficient. Running an efficient dishwasher costs $3–$5 per month, far less than handwashing.
How much does it cost to run a dishwasher per load?
A standard dishwasher cycle costs $0.16–$0.24 per load, while high-efficiency models cost as low as $0.10 per load. Running full loads and using eco settings can further reduce energy consumption.
How much electricity does a dishwasher use per hour (UK)?
In the UK, dishwashers consume 1,200–2,400 watts per hour. On average, a cycle requires 1.5–2.0 kWh, costing £0.30–£0.50 per use, depending on the energy tariff.
How much electricity does a dishwasher use per month (UK)?
A dishwasher in the UK uses around 30–50 kWh per month, costing approximately £6–£12, based on an electricity rate of £0.20 per kWh. Using off-peak energy tariffs can reduce costs.
Does a dishwasher save water and electricity (UK)?
Yes, UK dishwashers are more water-efficient than handwashing, using only 3–5 gallons per cycle. They also consume 50% less energy than older models, making them an eco-friendly and cost-effective option.
Do dishwashers use a lot of electricity (UK)?
Modern UK dishwashers consume 200–800 kWh per year, with ENERGY STAR® models using under 270 kWh. Running a dishwasher costs £6–£12 per month, making it energy-efficient compared to manual washing.
Does Running a Dishwasher at Night Save Money?
Yes! Electricity rates are cheaper at night due to off-peak pricing. Running your dishwasher between 9 PM and 7 AM can reduce electricity costs by up to 25%.
