How to Calculate the Running Cost of Your Home Appliances
Many Australians focus on the upfront purchase price of appliances but overlook the ongoing running cost. A cheap fridge that uses $200 per year in electricity costs more over 10 years than a premium model that uses $80 per year. Here's how to calculate running costs accurately.
The Formula
Running cost = (Wattage ÷ 1,000) × Hours used per day × 365 × Electricity rate
For example: A fridge rated at 150 watts running 24 hours per day at 30 cents per kWh:
(150 ÷ 1,000) × 24 × 365 × $0.30 = $394 per year
Electricity Rates in Sydney
Residential electricity in Sydney (NSW) typically costs between 25–40 cents per kWh depending on your retailer and plan. Use 30 cents per kWh as a reasonable midpoint for calculations. Check your electricity bill for your exact rate.
Running Costs by Appliance Type
Fridge
Fridges run 24/7 but their compressor cycles on and off. Actual consumption depends on size, insulation quality, ambient temperature and how often the door is opened. As a guide:
- Old inefficient fridge (1990s–2000s): 400–600 kWh/year = $120–$180/year
- Modern 400L fridge (3-star): 350–450 kWh/year = $105–$135/year
- Modern 600L fridge (5-star): 400–550 kWh/year = $120–$165/year
Washing Machine
Washing machines use the most energy when heating water. Cold water washes dramatically reduce running costs. Front loaders are significantly more efficient than top loaders.
- Top loader, hot wash, 7 washes/week: ~$150–$220/year
- Front loader, warm wash, 5 washes/week: ~$60–$100/year
- Front loader, cold wash: ~$20–$40/year
Dishwasher
Dishwashers consume most energy heating water. Modern eco cycles use less electricity than the standard cycle.
- Standard cycle, daily: ~$80–$120/year
- Eco cycle, daily: ~$40–$70/year
Dryer
Dryers are the most expensive appliance to run, particularly older vented models.
- Vented dryer, 2kW, 4 uses/week: ~$125–$175/year
- Heat pump dryer (600W), 4 uses/week: ~$35–$55/year
Oven
- Electric oven (2.5kW), 1 hour/day, 4 days/week: ~$100–$130/year
- Induction cooktop only, similar use: ~$70–$90/year
Using the Energy Star Label
Australian Energy Star labels show annual kWh consumption based on standardised test conditions. Multiply the kWh figure by your electricity rate to get an estimate of annual running cost. A label showing 350 kWh/year at $0.30/kWh = $105 per year.
Highest Impact Upgrades
The biggest running cost savings come from replacing:
- An old vented dryer with a heat pump dryer
- An old top loader with a modern front loader
- An old side-by-side fridge with a modern French door model
Oceania Appliances stocks energy-efficient appliances at competitive prices. Free delivery across Sydney, 3–6 month warranty. Contact us to compare running costs before you buy.