🔌 විදුලි පිරිවැය කැල්ක්යුලේටරය

මෙම කැල්ක්යුලේටරය ගැන

An electricity cost calculator turns an appliance’s wattage into money by tracing the chain from power to energy to price. Energy in kilowatt-hours is power in kilowatts times hours of use, so a device’s daily energy is its watts ÷ 1,000, multiplied by the hours it runs each day; the cost is that energy times your price per kWh. Advanced fields let you set the number of identical units and how many days a week they run, so occasional loads are averaged fairly across the calendar.

As a worked example, a 100 W device left on 5 hours a day uses 0.1 kW × 5 = 0.5 kWh daily. At $0.15 per kWh that is about $0.075 a day, which works out to roughly $2.28 a month and $27.40 a year (the tool uses 30.44 days per month and 365.25 days per year for accuracy). A 1,500 W space heater run the same 5 hours costs fifteen times as much — around $1.13 a day — which quickly shows why high-wattage heating dominates a power bill.

The calculator returns the daily, monthly and yearly cost plus the annual energy in kWh, and a period-by-period schedule you can open to compare day, week, month and year. It is the practical way to decide whether an old fridge is worth replacing, budget for a new appliance, spot the phantom cost of always-on devices, or compare the running cost of two products with different wattages.