Washing machine
How much electricity does a washing machine use?
400–1,400 W · heating water is the cost · $3–$15 per month
A washing machine's motor is small. The heater is not. On a hot wash the machine spends most of a cycle heating 30–60 litres of water to 40–60°C, which is where almost all the energy goes.
What each cycle costs
- Cold wash (30°C): about 0.3–0.5 kWh per load
- Warm wash (40°C): about 0.6–0.9 kWh per load
- Hot wash (60°C): about 1.2–1.8 kWh per load
- 90°C cotton: up to 2.5 kWh per load
The single change that matters
Washing at 30°C instead of 60°C uses roughly a quarter of the energy, and modern detergents are formulated for it. If you do five loads a week, that switch alone can take $60–100 a year off the bill without changing the machine.
Front loader vs top loader
Front loaders use 40–60% less water and typically 30% less energy than agitator top loaders, because they tumble rather than fill. If you are replacing a machine, this matters more than any efficiency label.
Does spinning save energy?
Indirectly, yes. A faster spin leaves less water in the clothes, so the dryer — which is far more expensive to run — finishes sooner. Spin speed is one of the highest-return settings on a washing machine.
Frequently asked questions
How many watts does a washing machine use?
400–1,400 W. The figure on the rating label is the maximum draw; actual use varies with settings, age and usage pattern.
How much does it cost to run a washing machine per month?
With the defaults above it comes to the monthly figure shown in the calculator. At 16.5¢/kWh — the US residential average — that is a realistic middle estimate. Your own bill may be 30% lower or higher depending on state.
Is it cheaper to run a washing machine at night?
Only if your utility offers a time-of-use plan and you avoid the 4pm–9pm peak window. On a flat-rate plan, the time of day makes no difference to the total.
Does the calculator account for real-world duty cycles?
Not automatically — you enter the effective hours yourself. For compressing appliances like refrigerators and AC units, enter the running watts and roughly the proportion of time the compressor is on, which is usually 30–50%.
Will a newer washing machine actually save money?
Compare the kWh figure in the calculator against an Energy Star model's stated annual use. If the difference is a few hundred kWh a year, the payback on a replacement is usually long; if it is over 500 kWh, it is worth pricing out.