Refrigerator Electricity Cost & Wattage
What a refrigerator costs to run: typical 150 W, about $78 a year. Adjust the figures to your own usage and electricity price.
Your Refrigerator running cost
Costs about
/ month
- Per day
- Per year
- Energy per year
Always on, based on a ~35% duty cycle.
Typical wattage
| Low | 80 W |
|---|---|
| Typical | 150 W |
| High | 400 W |
| Typical use | Runs continuously |
A refrigerator is the appliance most people forget about, yet it is one of the biggest single contributors to a home's electricity bill because it never switches off. Unlike a kettle or a heater, a fridge draws power quietly around the clock, cycling its compressor on and off to hold temperature. That is why its nameplate wattage is misleading: a fridge rated at 150 W does not use 150 W every hour. The compressor typically runs only about a third of the time, so the real average draw is far lower than the label suggests.
This is exactly what the calculator above accounts for. Instead of multiplying the full wattage by 24 hours, it applies a realistic duty cycle so the yearly figure reflects how a fridge actually behaves. A typical modern fridge-freezer uses somewhere between 250 and 500 kWh a year; older or larger American-style models with ice and water dispensers can use much more. Enter your model's wattage and your own price per kWh to see where yours lands.
Several things push the number up: a warm kitchen, a door that gets opened often, dusty condenser coils, worn door seals, and a freezer that has iced up. Because the fridge runs every hour of every day, small inefficiencies compound into real money over a year. The good news is that the same constant operation means small improvements — a cleaner coil, a slightly higher setpoint, better airflow — pay back continuously rather than only when you remember to switch something off.
How to cut refrigerator running costs
- Keep the fridge at 3–5 °C and the freezer at −18 °C; colder than needed just wastes power.
- Vacuum the condenser coils at the back or base once or twice a year — dust makes the compressor work harder.
- Leave a few centimetres of air around the cabinet so heat can escape, and keep it out of direct sun and away from the oven.
- Check the door seal with a sheet of paper: if it slides out easily, the gasket is leaking cold air.
- Let hot food cool before putting it in, and defrost a manual freezer before ice builds up past a few millimetres.
Frequently asked questions
Why does the calculator not just use the full wattage?
Because a fridge compressor cycles on and off. Running the nameplate wattage for a full 24 hours would overstate the cost roughly threefold. The calculator applies a duty cycle so the yearly figure matches how the fridge really runs.
How many kWh does a fridge use per year?
Most modern fridge-freezers use about 250–500 kWh a year. Small under-counter fridges use less; large American-style models with dispensers can exceed 600 kWh. Your energy label's annual figure is the best guide.
Is it cheaper to run an old fridge or buy a new one?
A fridge from 15+ years ago can use two to three times more than a modern A-rated model. If the old one runs constantly, the yearly saving from replacing it often pays back the purchase within a few years.