Energy Consumption Calculator
:root {
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font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
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color: #333;
line-height: 1.6;
margin: 0;
padding: 0;
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.loan-calc-container {
max-width: 800px;
margin: 30px auto;
padding: 25px;
background-color: var(–white);
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
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h1, h2 {
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font-size: 1rem;
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.input-group select {
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transition: background-color 0.3s ease;
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#result {
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/* Responsive Adjustments */
@media (max-width: 768px) {
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Energy Consumption Calculator
Understanding Energy Consumption Calculation
Calculating energy consumption is crucial for understanding your electricity usage, managing your budget, and identifying opportunities to save energy and money. The fundamental principle behind calculating energy consumption is based on the appliance's power rating, how long it's used, and the number of times it's used over a period.
The Formula
The basic formula to calculate energy consumed by an electrical appliance is:
Energy Consumed (in Watt-hours, Wh) = Power Rating (Watts) × Time Used (hours)
To make this more practical for household billing, we often convert this to kilowatt-hours (kWh), which is the standard unit electricity companies use.
Energy Consumed (in Kilowatt-hours, kWh) = [Power Rating (Watts) × Time Used (hours)] / 1000
This calculator extends this by considering daily, weekly, and yearly usage patterns, as well as the cost of electricity.
How the Calculator Works
Our calculator takes the following inputs:
- Appliance Power Rating (Watts): The electrical power the appliance consumes when it's running. This is usually found on a label on the appliance itself or in its manual.
- Hours Used Per Day: The average number of hours the appliance is actively used each day.
- Days Used Per Week: The number of days per week the appliance is used.
- Weeks Used Per Year: The number of weeks per year the appliance is used. This accounts for seasonal use or periods of non-use.
- Electricity Cost (per kWh): The rate you are charged by your electricity provider for each kilowatt-hour of energy consumed.
The calculator first determines the total hours the appliance is used per year:
Total Annual Hours = Hours Used Per Day × Days Used Per Week × Weeks Used Per Year
Then, it calculates the total energy consumed in Watt-hours and converts it to Kilowatt-hours:
Total Annual Energy (kWh) = [Power Rating (Watts) × Total Annual Hours] / 1000
Finally, it estimates the annual cost:
Annual Cost = Total Annual Energy (kWh) × Electricity Cost (per kWh)
Use Cases
- Budgeting: Estimate how much specific appliances will add to your monthly or annual electricity bill.
- Energy Efficiency: Compare the energy consumption of different appliances to make informed purchasing decisions.
- Conservation Efforts: Identify high-consumption appliances and consider ways to reduce their usage or replace them with more efficient models.
- Smart Home Planning: Understand the energy impact of running multiple devices simultaneously.
By understanding and calculating your energy consumption, you gain valuable insights into your energy habits and can take proactive steps towards a more energy-efficient and cost-effective lifestyle.
function calculateEnergyConsumption() {
var powerRating = parseFloat(document.getElementById("powerRating").value);
var hoursPerDay = parseFloat(document.getElementById("hoursPerDay").value);
var daysPerWeek = parseFloat(document.getElementById("daysPerWeek").value);
var weeksPerYear = parseFloat(document.getElementById("weeksPerYear").value);
var electricityCostPerKwh = parseFloat(document.getElementById("electricityCostPerKwh").value);
var resultDiv = document.getElementById("result");
// Validate inputs
if (isNaN(powerRating) || powerRating <= 0) {
resultDiv.innerHTML = "Please enter a valid positive power rating.";
resultDiv.style.display = 'block';
resultDiv.style.backgroundColor = '#dc3545';
return;
}
if (isNaN(hoursPerDay) || hoursPerDay < 0) {
resultDiv.innerHTML = "Please enter a valid non-negative number of hours per day.";
resultDiv.style.display = 'block';
resultDiv.style.backgroundColor = '#dc3545';
return;
}
if (isNaN(daysPerWeek) || daysPerWeek 7) {
resultDiv.innerHTML = "Please enter a valid number of days per week (1-7).";
resultDiv.style.display = 'block';
resultDiv.style.backgroundColor = '#dc3545';
return;
}
if (isNaN(weeksPerYear) || weeksPerYear 52) {
resultDiv.innerHTML = "Please enter a valid number of weeks per year (1-52).";
resultDiv.style.display = 'block';
resultDiv.style.backgroundColor = '#dc3545';
return;
}
if (isNaN(electricityCostPerKwh) || electricityCostPerKwh < 0) {
resultDiv.innerHTML = "Please enter a valid non-negative electricity cost per kWh.";
resultDiv.style.display = 'block';
resultDiv.style.backgroundColor = '#dc3545';
return;
}
var totalAnnualHours = hoursPerDay * daysPerWeek * weeksPerYear;
var totalAnnualEnergyWh = powerRating * totalAnnualHours;
var totalAnnualEnergyKwh = totalAnnualEnergyWh / 1000;
var annualCost = totalAnnualEnergyKwh * electricityCostPerKwh;
var formattedResult = "
Annual Energy Consumption: " + totalAnnualEnergyKwh.toFixed(2) + " kWh";
formattedResult += "
Estimated Annual Cost: $" + annualCost.toFixed(2);
resultDiv.innerHTML = formattedResult;
resultDiv.style.display = 'block';
resultDiv.style.backgroundColor = getComputedStyle(document.documentElement).getPropertyValue('–success-green').trim(); // Use success green
}