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Everyday Life Calculators
Appliance Wattage Calculator
Estimate the weekly and yearly running cost of an appliance based on its wattage and usage frequency.
Cost per use
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Cost per week
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Cost per year
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About the Appliance Wattage Calculator
Appliances that run occasionally — like a washing machine, dryer or microwave — are best costed per use rather than per day, since usage frequency varies.
Formula: Cost per Use = (Watts × Hours per Use ÷ 1000) × Price per kWh, then multiplied by how often it's used.
Great for identifying which appliances are worth upgrading to more efficient models.
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