Appliance Energy Star Savings Calculator
ANA›Life Services Authority›National Calculator Authority›Appliance Energy Star Savings Calculator
.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }
Appliance Energy Star Savings Calculator
Estimate your annual energy and cost savings by replacing an old appliance with an Energy Star certified model.
Appliance Type
Refrigerator Dishwasher Clothes Washer Clothes Dryer Freezer Room Air Conditioner Dehumidifier Water Heater (Electric)
Old Appliance Annual Energy Use (kWh/year)
Energy Star Model Annual Energy Use (kWh/year)
Your Electricity Rate ($/kWh)
Years of Use
CO₂ Emission Factor (lbs CO₂ per kWh) (US avg ≈ 0.92)
Calculate Savings
### Results
Annual Energy Saved Annual Cost Saved Lifetime Cost Saved ( yrs) Lifetime CO₂ Reduction Energy Reduction
// Typical Energy Star savings defaults by appliance type // [oldKwh, newKwh] based on EPA Energy Star program data var appDefaults = { refrigerator: [800, 450], dishwasher: [290, 210], washer: [590, 152], dryer: [769, 614], freezer: [415, 290], room_ac: [1000, 700], dehumidifier: [700, 490], water_heater: [4800, 1830] };
function appSetDefaults() { var type = document.getElementById('app-appliance').value; var d = appDefaults[type]; document.getElementById('app-old-energy').value = d[0]; document.getElementById('app-new-energy').value = d[1]; document.getElementById('app-result').style.display = 'none'; document.getElementById('app-error').style.display = 'none'; }
function appCalc() { var errEl = document.getElementById('app-error'); var resEl = document.getElementById('app-result'); errEl.style.display = 'none'; resEl.style.display = 'none';
var oldKwh = parseFloat(document.getElementById('app-old-energy').value); var newKwh = parseFloat(document.getElementById('app-new-energy').value); var rate = parseFloat(document.getElementById('app-rate').value); var years = parseInt(document.getElementById('app-years').value); var co2fac = parseFloat(document.getElementById('app-co2').value);
// --- Validation --- var errors = []; if (isNaN(oldKwh) || oldKwh = oldKwh) errors.push("Energy Star model energy use must be less than the old appliance energy use."); if (isNaN(rate) || rate 30) errors.push("Years of use must be between 1 and 30."); if (isNaN(co2fac) || co2fac 0) { errEl.innerHTML = errors.join(''); errEl.style.display = 'block'; return; }
// --- Core Formulas --- // Annual energy savings (kWh/yr) var annualKwh = oldKwh - newKwh;
// Annual cost savings ($) // Annual_Cost_Savings = Annual_kWh_Saved × Electricity_Rate var annualCost = annualKwh * rate;
// Lifetime cost savings ($) // Lifetime_Cost_Savings = Annual_Cost_Savings × Years var lifetimeCost = annualCost * years;
// Lifetime CO2 reduction (lbs) // CO2_Reduction = Annual_kWh_Saved × Years × CO2_Factor var lifetimeCo2 = annualKwh * years * co2fac;
// Percentage energy reduction // Pct_Reduction = (Annual_kWh_Saved / Old_kWh) × 100 var pctReduction = (annualKwh / oldKwh) * 100;
// --- Display --- document.getElementById('app-r-kwh').textContent = annualKwh.toLocaleString('en-US', {maximumFractionDigits:1}) + ' kWh/yr'; document.getElementById('app-r-annual').textContent = '$' + annualCost.toLocaleString('en-US', {minimumFractionDigits:2, maximumFractionDigits:2}) + '/yr'; document.getElementById('app-r-yrlabel').textContent = years; document.getElementById('app-r-lifetime').textContent= '$' + lifetimeCost.toLocaleString('en-US', {minimumFractionDigits:2, maximumFractionDigits:2}); document.getElementById('app-r-co2').textContent = lifetimeCo2.toLocaleString('en-US', {maximumFractionDigits:0}) + ' lbs CO₂'; document.getElementById('app-r-pct').textContent = pctReduction.toFixed(1) + '% reduction';
var co2tons = (lifetimeCo2 / 2204.62).toFixed(2); document.getElementById('app-r-note').textContent = 'That’s equivalent to ' + co2tons + ' metric tons of CO₂ avoided over ' + years + ' year(s).';
resEl.style.display = 'block'; }
#### Formulas Used
Annual Energy Saved (kWh/yr) = Old Appliance kWh/yr − Energy Star kWh/yr
Annual Cost Saved ($/yr) = Annual Energy Saved × Electricity Rate ($/kWh)
Lifetime Cost Saved ($) = Annual Cost Saved × Years of Use
Lifetime CO₂ Reduction (lbs) = Annual Energy Saved × Years of Use × CO₂ Emission Factor (lbs/kWh)
Energy Reduction (%) = (Annual Energy Saved ÷ Old Appliance kWh/yr) × 100
#### Assumptions & References
- Default energy use values are based on EPA Energy Star program typical usage data.
- Source: Energy Star Product Finder, EPA eGRID, U.S. EIA Electric Power Monthly.
More Calculators
- Illinois Sales Tax Calculator for Construction Materials
- Phishing Risk Assessment Calculator
- Illinois Commercial Building Permit Cost Estimator
- EV Charging Cost Calculator (Illinois Electricity Rates)
- PLC Scan Time Calculator
- Credit Freeze vs. Credit Monitoring Cost-Benefit Calculator
- Motor Power and Torque Calculator
- Subcontractor Compliance Checklist Scorer
- New Hampshire Contractor License Fee Calculator
- NH Contractor Insurance Cost Estimator
- New Jersey Home Improvement Contract Value Threshold Checker
- NH Contractor Bond Amount Calculator
References
The law belongs to the people. Georgia v. Public.Resource.Org, 590 U.S. (2020)