Utility Cost Calculator

Utility Cost Calculator & Analysis – Free Online Tool :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –card-background: #ffffff; –text-color: #333; –border-color: #dee2e6; –shadow-color: rgba(0, 0, 0, 0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); margin: 0; padding: 20px; line-height: 1.6; } .container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr; gap: 30px; } @media (min-width: 992px) { .container { grid-template-columns: 2fr 3fr; } } h1, h2, h3 { color: var(–primary-color); } h1 { text-align: center; margin-bottom: 20px; font-size: 2.5em; } h2 { margin-top: 30px; margin-bottom: 15px; font-size: 2em; border-bottom: 2px solid var(–primary-color); padding-bottom: 5px; } h3 { margin-top: 20px; margin-bottom: 10px; font-size: 1.5em; } .calculator-wrapper { background-color: var(–card-background); padding: 25px; border-radius: 8px; box-shadow: 0 4px 15px var(–shadow-color); } .input-group { margin-bottom: 20px; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: var(–primary-color); } .input-group input[type="number"], .input-group input[type="text"], .input-group select { width: calc(100% – 22px); padding: 10px; border: 1px solid var(–border-color); border-radius: 4px; font-size: 1em; box-sizing: border-box; } .input-group input[type="number"]:focus, .input-group input[type="text"]:focus, .input-group select:focus { outline: none; border-color: var(–primary-color); box-shadow: 0 0 0 3px rgba(0, 74, 153, 0.2); } .input-group .helper-text { font-size: 0.85em; color: #6c757d; margin-top: 5px; display: block; } .error-message { color: #dc3545; font-size: 0.85em; margin-top: 5px; display: none; } .error-message.visible { display: block; } .button-group { display: flex; gap: 10px; margin-top: 25px; justify-content: space-between; } button { padding: 12px 20px; border: none; border-radius: 5px; cursor: pointer; font-size: 1em; font-weight: bold; transition: background-color 0.3s ease, transform 0.2s ease; } button.primary { background-color: var(–primary-color); color: white; } button.primary:hover { background-color: #003b7a; transform: translateY(-1px); } button.reset { background-color: #6c757d; color: white; } button.reset:hover { background-color: #5a6268; transform: translateY(-1px); } button.copy { background-color: #ffc107; color: #212529; } button.copy:hover { background-color: #e0a800; transform: translateY(-1px); } .results-container { background-color: var(–card-background); padding: 25px; border-radius: 8px; box-shadow: 0 4px 15px var(–shadow-color); margin-top: 20px; } .results-container h3 { margin-top: 0; color: var(–primary-color); } .primary-result { background-color: var(–success-color); color: white; padding: 15px; margin-bottom: 20px; border-radius: 5px; text-align: center; font-size: 1.8em; font-weight: bold; } .intermediate-results div { margin-bottom: 10px; font-size: 1.1em; } .intermediate-results span { font-weight: bold; color: var(–primary-color); margin-left: 5px; } .formula-explanation { font-size: 0.9em; color: #6c757d; margin-top: 15px; padding-top: 10px; border-top: 1px dashed var(–border-color); } table { width: 100%; border-collapse: collapse; margin-top: 20px; margin-bottom: 30px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05); } th, td { border: 1px solid var(–border-color); padding: 10px 12px; text-align: right; } th { background-color: var(–primary-color); color: white; font-weight: bold; text-align: center; } td { background-color: var(–card-background); } tr:nth-child(even) td { background-color: #f2f6f9; } caption { font-size: 1.1em; font-weight: bold; color: var(–primary-color); margin-bottom: 10px; text-align: left; } canvas { display: block; margin: 20px auto; max-width: 100%; background-color: var(–card-background); border-radius: 5px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); } .article-section { background-color: var(–card-background); padding: 25px; border-radius: 8px; box-shadow: 0 4px 15px var(–shadow-color); margin-top: 30px; } .article-section p, .article-section ul, .article-section ol { margin-bottom: 15px; } .article-section li { margin-bottom: 8px; } .article-section a { color: var(–primary-color); text-decoration: none; font-weight: bold; } .article-section a:hover { text-decoration: underline; } .internal-links-list li { margin-bottom: 15px; } .mobile-header { display: block; text-align: center; margin-bottom: 20px; font-size: 1.8em; color: var(–primary-color); font-weight: bold; } @media (min-width: 992px) { .mobile-header { display: none; } }

Utility Cost Calculator

Utility Cost Calculator
Enter your average monthly electricity consumption in kilowatt-hours.
Enter the cost per kilowatt-hour from your electricity bill.
Enter your average monthly gas consumption. Specify units (therms/m³).
Enter the cost per therm or cubic meter of gas.
Enter your average monthly water consumption. Specify units (gallons/m³).
Enter the cost per gallon or cubic meter of water.
Include costs for trash, recycling, internet, etc.

Your Estimated Utility Costs

$0.00
Monthly Electricity Cost: $0.00
Monthly Gas Cost: $0.00
Monthly Water Cost: $0.00
Total Monthly Costs: $0.00
Estimated Annual Costs: $0.00
Formula Used:
Total Monthly Cost = (Electricity Usage * Electricity Rate) + (Gas Usage * Gas Rate) + (Water Usage * Water Rate) + Other Monthly Costs
Annual Cost = Total Monthly Cost * 12

Monthly Utility Cost Breakdown

Monthly Breakdown of Utility Expenses
Utility Type Usage Rate Cost
Electricity 0 kWh $0.00/kWh $0.00
Gas 0 Therms $0.00/Therm $0.00
Water 0 Gallons $0.00/Gallon $0.00
Other $0.00
Total Monthly $0.00

Monthly Utility Cost Distribution

What is a Utility Cost Calculator?

A utility cost calculator is an online tool designed to help individuals and businesses estimate their recurring expenses for essential services like electricity, natural gas, water, and sometimes other related costs such as internet or waste management. By inputting specific usage data and associated rates, users can gain a clear picture of their expected monthly and annual expenditures. This type of calculator is crucial for budgeting, financial planning, and making informed decisions about consumption habits or service providers. It simplifies complex billing structures into understandable figures, empowering users to manage their finances more effectively.

Who should use it? Anyone responsible for paying household or business utility bills can benefit from a utility cost calculator. This includes homeowners, renters, property managers, small business owners, and even individuals looking to understand the financial impact of moving to a new location or adopting new appliances. It's particularly useful for those trying to reduce their expenses, compare potential living costs, or simply gain better control over their budget. Understanding your utility cost breakdown is a fundamental step in effective financial management.

Common misconceptions often revolve around the variability of costs. Some believe their utility bills are fixed, when in reality, usage patterns, seasonal changes, and fluctuating rates can significantly impact the final amount. Another misconception is that all providers charge the same; in competitive markets, different utility companies may offer varying pricing structures, making comparison essential. This utility cost calculator helps demystify these variations.

Utility Cost Calculator Formula and Mathematical Explanation

The core of any utility cost calculator lies in its straightforward mathematical formula. It essentially sums up the costs associated with each individual utility based on usage and price, then aggregates these for a total.

The calculation proceeds as follows:

  1. Calculate Individual Utility Costs: For each utility (electricity, gas, water), multiply the amount consumed by the price per unit.
  2. Sum All Utility Costs: Add up the calculated costs for each utility.
  3. Include Other Fixed Costs: Add any additional recurring utility-related expenses (e.g., trash, internet) that are not usage-based.
  4. Calculate Total Monthly Cost: The sum from steps 1-3 gives the total estimated monthly utility expenditure.
  5. Calculate Annual Cost: Multiply the total monthly cost by 12 to estimate the yearly expenditure.

Formula:

Total Monthly Cost = (Electricity Usage * Electricity Rate) + (Gas Usage * Gas Rate) + (Water Usage * Water Rate) + Other Monthly Costs

Annual Cost = Total Monthly Cost * 12

Variables Used in the Utility Cost Calculator

Variable Definitions for Utility Cost Calculation
Variable Name Meaning Unit Typical Range
Electricity Usage Amount of electricity consumed kWh (Kilowatt-hours) 100 – 2000+ kWh/month
Electricity Rate Cost per unit of electricity $/kWh $0.08 – $0.30+/kWh
Gas Usage Amount of natural gas consumed Therms or m³ 10 – 200+ Therms/month (varies greatly by climate/season)
Gas Rate Cost per unit of natural gas $/Therm or $/m³ $0.50 – $3.00+/Therm (varies greatly)
Water Usage Amount of water consumed Gallons or m³ 1000 – 15000+ Gallons/month
Water Rate Cost per unit of water $/Gallon or $/m³ $0.001 – $0.02+/Gallon
Other Monthly Costs Sum of additional utility-related expenses $ $20 – $200+ /month

Practical Examples of Using the Utility Cost Calculator

Let's explore a couple of scenarios to see the utility cost calculator in action:

Example 1: A Moderately Sized Family Home

A family of four living in a 2,000 sq ft home in a temperate climate:

  • Monthly Electricity Usage: 950 kWh
  • Electricity Price: $0.14/kWh
  • Monthly Gas Usage: 60 therms
  • Gas Price: $1.10/therm
  • Monthly Water Usage: 7,000 gallons
  • Water Price: $0.004/gallon
  • Other Monthly Costs (Trash, Internet): $120

Using the utility cost calculator:

  • Electricity Cost = 950 kWh * $0.14/kWh = $133.00
  • Gas Cost = 60 therms * $1.10/therm = $66.00
  • Water Cost = 7,000 gallons * $0.004/gallon = $28.00
  • Total Monthly Cost = $133.00 + $66.00 + $28.00 + $120.00 = $347.00
  • Estimated Annual Cost = $347.00 * 12 = $4,164.00

Interpretation: This family can budget approximately $347 per month for core utilities, with an annual outlay of just over $4,000. This figure helps them assess if their current budget is adequate or if they need to explore ways to reduce consumption.

Example 2: A Single Person Apartment Dweller

An individual living in a 700 sq ft apartment in a warmer climate, relying more on AC:

  • Monthly Electricity Usage: 400 kWh
  • Electricity Price: $0.18/kWh
  • Monthly Gas Usage: 5 therms (for occasional heating/cooking)
  • Gas Price: $1.50/therm
  • Monthly Water Usage: 1,500 gallons
  • Water Price: $0.006/gallon
  • Other Monthly Costs (Trash, Internet): $90

Using the utility cost calculator:

  • Electricity Cost = 400 kWh * $0.18/kWh = $72.00
  • Gas Cost = 5 therms * $1.50/therm = $7.50
  • Water Cost = 1,500 gallons * $0.006/gallon = $9.00
  • Total Monthly Cost = $72.00 + $7.50 + $9.00 + $90.00 = $178.50
  • Estimated Annual Cost = $178.50 * 12 = $2,142.00

Interpretation: This individual's utility expenses are significantly lower, around $178.50 monthly. This highlights how living space, occupancy, and climate heavily influence utility bills. This estimate is vital for someone on a tighter budget.

How to Use This Utility Cost Calculator

Our free utility cost calculator is designed for simplicity and accuracy. Follow these steps to get your personalized cost estimate:

  1. Gather Your Data: Review recent utility bills (electricity, gas, water) to find your average monthly usage figures and the corresponding rates charged by your providers. Note any other recurring utility-related fees.
  2. Input Usage Values: Enter the monthly usage for electricity (in kWh), gas (in therms or m³), and water (in gallons or m³) into the respective fields. Be precise with your units.
  3. Input Rate Values: Enter the cost per unit for each utility (e.g., $/kWh, $/therm, $/gallon).
  4. Enter Other Costs: Input any additional monthly utility expenses like trash collection, sewer fees, or internet service into the "Other Monthly Costs" field.
  5. Click Calculate: Press the "Calculate Costs" button.

Interpreting Your Results:

  • Primary Result (Highlighted): This shows your estimated total monthly utility cost.
  • Intermediate Results: These break down the cost for each specific utility (electricity, gas, water), helping you identify which services contribute most to your expenses.
  • Annual Cost: This provides a yearly projection, useful for long-term financial planning.
  • Breakdown Table: Offers a detailed view of usage, rates, and costs for each utility.
  • Cost Distribution Chart: Visually represents the proportion of your total monthly cost attributed to each utility type.

Decision-Making Guidance: Use these figures to compare potential costs between different properties, assess the impact of energy-saving measures, or identify areas where you might be overspending. If your calculated costs seem high, consider exploring energy efficiency upgrades or comparing rates from different utility providers. This utility cost calculator is your first step towards informed decisions.

Key Factors That Affect Utility Costs

Several elements influence the final amount on your utility bills. Understanding these factors can help you manage and potentially reduce your overall utility cost.

  1. Climate and Season: Extreme temperatures (hot summers, cold winters) drastically increase heating and cooling demands, leading to higher electricity and gas bills. Seasonal weather patterns are a primary driver of variable utility costs.
  2. Home Size and Insulation: Larger homes naturally require more energy for heating and cooling. Poor insulation allows heated or cooled air to escape, forcing HVAC systems to work harder and consume more power, thus increasing your utility cost calculator inputs.
  3. Appliance Efficiency and Usage Habits: Older, less efficient appliances (refrigerators, washing machines, HVAC systems) consume more energy. How often and how long you use appliances, lights, and electronics also directly impacts usage. Simple behavioral changes can significantly reduce costs.
  4. Number of Occupants: More people in a household generally means higher consumption of water, electricity (more devices, lights), and potentially gas for cooking. This directly affects the usage figures entered into a utility cost calculator.
  5. Utility Provider Rates and Plans: The price per kilowatt-hour (kWh) for electricity, per therm for gas, or per gallon for water varies significantly between providers and even between different rate plans offered by the same provider. Time-of-use plans can also alter costs based on when energy is consumed.
  6. Water Conservation Practices: Leaky faucets, long showers, and inefficient irrigation systems can dramatically increase water usage. Implementing water-saving fixtures and habits is key to managing water bills.
  7. Government Regulations and Taxes: Local and national regulations, environmental mandates, and various taxes or surcharges can be added to utility bills, increasing the overall cost regardless of consumption.
  8. Property Type: Renting versus owning, and the type of dwelling (apartment vs. single-family home), can affect who is responsible for utility bills and the potential for efficiency upgrades. Renters might have less control over insulation or appliance upgrades.

Frequently Asked Questions (FAQ) about Utility Costs

Q1: How accurate is this utility cost calculator?
A1: The accuracy of this utility cost calculator depends entirely on the accuracy of the input data you provide. If you enter precise historical usage and rate information from your bills, the estimate will be highly accurate for your current conditions. It serves as an excellent estimation tool but may not account for future rate changes or unforeseen usage spikes.
Q2: Can this calculator predict future utility costs with rising energy prices?
A2: While the calculator uses current rates, it doesn't automatically adjust for future price fluctuations. To estimate future costs with potential price increases, you would need to manually input projected higher rates into the calculator.
Q3: What if my gas/water is measured in cubic meters (m³) instead of therms/gallons?
A3: The calculator allows for flexible input. Ensure you enter the correct rate corresponding to the unit you use (e.g., if you input usage in m³, enter the price per m³). You might need to convert units from your bill if they differ from the calculator's default suggestion, using standard conversion factors.
Q4: My electricity bill has different rates for different times of day. How do I use the calculator?
A4: For simplicity, the calculator uses a single average rate. If you're on a time-of-use plan, calculate your average monthly kWh usage and average monthly $/kWh rate based on your typical consumption patterns across peak and off-peak hours. For a more precise calculation, you'd need to break down usage and cost by time period, which is beyond this basic tool.
Q5: Does "Other Monthly Costs" include my rent or mortgage?
A5: No, "Other Monthly Costs" is specifically for recurring utility-related services like trash removal, recycling, sewer, internet, or cable TV if you consider them part of your utility bundle. It does not include housing payments like rent or mortgage.
Q6: How can I reduce my utility bills based on these results?
A6: Analyze the breakdown: if electricity is high, focus on appliance efficiency, lighting, and HVAC. If gas is high, check heating system efficiency and insulation. For water, look for leaks and consider low-flow fixtures. The calculator highlights your biggest cost centers, guiding your reduction efforts.
Q7: What if I have solar panels or other energy generation?
A7: This calculator assumes you are primarily a consumer of utilities. If you generate your own power (e.g., solar), your net electricity usage and cost will be lower. You would need to calculate your net consumption after generation and input that figure for a more accurate result.
Q8: Is there a way to compare different utility providers using this tool?
A8: Yes, you can use this utility cost calculator for comparison. Get rate information from different providers and input them separately to see which one offers a lower estimated cost based on your typical usage.

Related Tools and Internal Resources

function validateInput(id, errorId, min, max) { var input = document.getElementById(id); var errorElement = document.getElementById(errorId); var value = parseFloat(input.value); errorElement.innerText = "; errorElement.classList.remove('visible'); input.style.borderColor = "; if (input.value === ") { errorElement.innerText = 'This field is required.'; errorElement.classList.add('visible'); input.style.borderColor = '#dc3545'; return false; } if (isNaN(value)) { errorElement.innerText = 'Please enter a valid number.'; errorElement.classList.add('visible'); input.style.borderColor = '#dc3545'; return false; } if (min !== undefined && value max) { errorElement.innerText = 'Value is too high.'; errorElement.classList.add('visible'); input.style.borderColor = '#dc3545'; return false; } return true; } function formatCurrency(amount) { return "$" + amount.toFixed(2); } function formatUsage(value, unit) { if (isNaN(value)) return "0 " + unit; return parseFloat(value).toLocaleString() + " " + unit; } function formatRate(value, unit) { if (isNaN(value)) return "$0.00/" + unit; return formatCurrency(value) + "/" + unit; } var myChart = null; function calculateUtilityCosts() { var valid = true; valid = validateInput('electricityUsage', 'electricityUsageError', 0) && valid; valid = validateInput('electricityRate', 'electricityRateError', 0) && valid; valid = validateInput('gasUsage', 'gasUsageError', 0) && valid; valid = validateInput('gasRate', 'gasRateError', 0) && valid; valid = validateInput('waterUsage', 'waterUsageError', 0) && valid; valid = validateInput('waterRate', 'waterRateError', 0) && valid; valid = validateInput('otherUtilities', 'otherUtilitiesError', 0) && valid; if (!valid) { document.getElementById('result').style.display = 'none'; return; } else { document.getElementById('result').style.display = 'block'; } var electricityUsage = parseFloat(document.getElementById('electricityUsage').value); var electricityRate = parseFloat(document.getElementById('electricityRate').value); var gasUsage = parseFloat(document.getElementById('gasUsage').value); var gasRate = parseFloat(document.getElementById('gasRate').value); var waterUsage = parseFloat(document.getElementById('waterUsage').value); var waterRate = parseFloat(document.getElementById('waterRate').value); var otherUtilities = parseFloat(document.getElementById('otherUtilities').value); var monthlyElectricityCost = electricityUsage * electricityRate; var monthlyGasCost = gasUsage * gasRate; var monthlyWaterCost = waterUsage * waterRate; var totalMonthlyCost = monthlyElectricityCost + monthlyGasCost + monthlyWaterCost + otherUtilities; var annualCost = totalMonthlyCost * 12; document.getElementById('result').style.display = 'block'; document.querySelector('.primary-result').innerText = formatCurrency(totalMonthlyCost); document.getElementById('monthlyElectricityCost').innerText = formatCurrency(monthlyElectricityCost); document.getElementById('monthlyGasCost').innerText = formatCurrency(monthlyGasCost); document.getElementById('monthlyWaterCost').innerText = formatCurrency(monthlyWaterCost); document.getElementById('totalMonthlyCost').innerText = formatCurrency(totalMonthlyCost); document.getElementById('annualCost').innerText = formatCurrency(annualCost); // Update Table document.getElementById('tableElectricityUsage').innerText = formatUsage(electricityUsage, 'kWh'); document.getElementById('tableElectricityRate').innerText = formatRate(electricityRate, 'kWh'); document.getElementById('tableElectricityCost').innerText = formatCurrency(monthlyElectricityCost); document.getElementById('tableGasUsage').innerText = formatUsage(gasUsage, 'Therms'); document.getElementById('tableGasRate').innerText = formatRate(gasRate, 'Therm'); document.getElementById('tableGasCost').innerText = formatCurrency(monthlyGasCost); document.getElementById('tableWaterUsage').innerText = formatUsage(waterUsage, 'Gallons'); document.getElementById('tableWaterRate').innerText = formatRate(waterRate, 'Gallon'); document.getElementById('tableWaterCost').innerText = formatCurrency(monthlyWaterCost); document.getElementById('tableOtherCost').innerText = formatCurrency(otherUtilities); document.getElementById('tableTotalMonthlyCost').innerText = formatCurrency(totalMonthlyCost); // Update Chart updateChart(monthlyElectricityCost, monthlyGasCost, monthlyWaterCost, otherUtilities); } function updateChart(elecCost, gasCost, waterCost, otherCost) { var ctx = document.getElementById('costDistributionChart').getContext('2d'); // Destroy previous chart instance if it exists if (myChart) { myChart.destroy(); } var chartData = { labels: ['Electricity', 'Gas', 'Water', 'Other'], datasets: [{ label: 'Monthly Utility Costs ($)', data: [elecCost, gasCost, waterCost, otherCost], backgroundColor: [ 'rgba(0, 74, 153, 0.7)', // Primary Color 'rgba(255, 159, 64, 0.7)', // Orange 'rgba(75, 192, 192, 0.7)', // Green 'rgba(153, 102, 255, 0.7)' // Purple ], borderColor: [ 'rgba(0, 74, 153, 1)', 'rgba(255, 159, 64, 1)', 'rgba(75, 192, 192, 1)', 'rgba(153, 102, 255, 1)' ], borderWidth: 1 }] }; myChart = new Chart(ctx, { type: 'pie', data: chartData, options: { responsive: true, maintainAspectRatio: true, plugins: { legend: { position: 'top', }, title: { display: true, text: 'Distribution of Monthly Utility Expenses' } } } }); } function resetCalculator() { document.getElementById('electricityUsage').value = "; document.getElementById('electricityRate').value = "; document.getElementById('gasUsage').value = "; document.getElementById('gasRate').value = "; document.getElementById('waterUsage').value = "; document.getElementById('waterRate').value = "; document.getElementById('otherUtilities').value = "; document.getElementById('electricityUsageError').innerText = "; document.getElementById('electricityUsageError').classList.remove('visible'); document.getElementById('electricityRateError').innerText = "; document.getElementById('electricityRateError').classList.remove('visible'); document.getElementById('gasUsageError').innerText = "; document.getElementById('gasUsageError').classList.remove('visible'); document.getElementById('gasRateError').innerText = "; document.getElementById('gasRateError').classList.remove('visible'); document.getElementById('waterUsageError').innerText = "; document.getElementById('waterUsageError').classList.remove('visible'); document.getElementById('waterRateError').innerText = "; document.getElementById('waterRateError').classList.remove('visible'); document.getElementById('otherUtilitiesError').innerText = "; document.getElementById('otherUtilitiesError').classList.remove('visible'); document.getElementById('result').style.display = 'block'; // Keep visible but reset values document.querySelector('.primary-result').innerText = formatCurrency(0); document.getElementById('monthlyElectricityCost').innerText = formatCurrency(0); document.getElementById('monthlyGasCost').innerText = formatCurrency(0); document.getElementById('monthlyWaterCost').innerText = formatCurrency(0); document.getElementById('totalMonthlyCost').innerText = formatCurrency(0); document.getElementById('annualCost').innerText = formatCurrency(0); // Reset Table document.getElementById('tableElectricityUsage').innerText = '0 kWh'; document.getElementById('tableElectricityRate').innerText = '$0.00/kWh'; document.getElementById('tableElectricityCost').innerText = '$0.00'; document.getElementById('tableGasUsage').innerText = '0 Therms'; document.getElementById('tableGasRate').innerText = '$0.00/Therm'; document.getElementById('tableGasCost').innerText = '$0.00'; document.getElementById('tableWaterUsage').innerText = '0 Gallons'; document.getElementById('tableWaterRate').innerText = '$0.00/Gallon'; document.getElementById('tableWaterCost').innerText = '$0.00'; document.getElementById('tableOtherCost').innerText = '$0.00'; document.getElementById('tableTotalMonthlyCost').innerText = '$0.00'; // Reset Chart data to zero updateChart(0, 0, 0, 0); // Re-apply default border colors var inputs = document.querySelectorAll('.loan-calc-container input[type="number"], .loan-calc-container select'); for (var i = 0; i < inputs.length; i++) { inputs[i].style.borderColor = ''; } } function copyResults() { var monthlyCost = document.querySelector('.primary-result').innerText; var annualCost = document.getElementById('annualCost').innerText; var elecCost = document.getElementById('monthlyElectricityCost').innerText; var gasCost = document.getElementById('monthlyGasCost').innerText; var waterCost = document.getElementById('monthlyWaterCost').innerText; var totalMonthly = document.getElementById('totalMonthlyCost').innerText; var summary = "Utility Cost Calculator Results:\n\n"; summary += "Estimated Monthly Cost: " + monthlyCost + "\n"; summary += "Estimated Annual Cost: " + annualCost + "\n"; summary += "—————————-\n"; summary += "Breakdown:\n"; summary += " Electricity: " + elecCost + "\n"; summary += " Gas: " + gasCost + "\n"; summary += " Water: " + waterCost + "\n"; summary += " Other: " + document.getElementById('otherUtilities').value + "\n"; summary += " Total Monthly: " + totalMonthly + "\n"; // Use navigator.clipboard for modern browsers if (navigator.clipboard && navigator.clipboard.writeText) { navigator.clipboard.writeText(summary).then(function() { alert('Results copied to clipboard!'); }).catch(function(err) { console.error('Failed to copy text: ', err); fallbackCopyTextToClipboard(summary); // Fallback for older browsers }); } else { fallbackCopyTextToClipboard(summary); // Fallback for older browsers } } function fallbackCopyTextToClipboard(text) { var textArea = document.createElement("textarea"); textArea.value = text; textArea.style.position="fixed"; textArea.style.left="-9999px"; textArea.style.top="-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'successful' : 'unsuccessful'; alert('Results copied to clipboard! (' + msg + ')'); } catch (err) { alert('Oops, unable to copy. Please copy manually.'); } document.body.removeChild(textArea); } // Initial calculation on page load if inputs are pre-filled (e.g., from session) // Or just to show default zero state clearly document.addEventListener('DOMContentLoaded', function() { calculateUtilityCosts(); // Load Chart.js library dynamically var script = document.createElement('script'); script.src = 'https://cdn.jsdelivr.net/npm/chart.js'; script.onload = function() { // Chart.js is loaded, now we can initialize the chart // We call calculateUtilityCosts() again to ensure chart is drawn with initial zeros calculateUtilityCosts(); }; document.head.appendChild(script); }); // Re-calculate on input change var inputFields = document.querySelectorAll('.loan-calc-container input[type="number"], .loan-calc-container select'); for (var i = 0; i < inputFields.length; i++) { inputFields[i].addEventListener('input', calculateUtilityCosts); }

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