EV Range and Trip Planner Calculator
ANA›Life Services Authority›National Calculator Authority›EV Range and Trip Planner 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; } }
EV Range and Trip Planner Calculator
Estimate your electric vehicle's range and determine how many charging stops you'll need for a trip based on battery capacity, efficiency, and driving conditions.
Battery Capacity (kWh)
Energy Consumption (miles/kWh or km/kWh)
Distance Unit
Miles Kilometers
Starting State of Charge (%)
Reserve State of Charge (%) — don't deplete below this
Trip Distance (optional, same unit as above)
Temperature Efficiency Factor (%)
Ideal (20–25°C / 68–77°F) — 100% Mild (10–20°C / 50–68°F) — ~90% Cold (0–10°C / 32–50°F) — ~80% Very Cold (below 0°C / 32°F) — ~65% Warm (25–35°C / 77–95°F) — ~95%
HVAC Usage Factor (%)
No HVAC — 100% Light HVAC — ~95% Moderate HVAC — ~88% Heavy HVAC — ~80%
Highway Speed Factor (%)
City / Mixed — 100% Highway 65 mph / 105 km/h — ~85% Highway 75 mph / 120 km/h — ~75% Highway 80+ mph / 130+ km/h — ~70%
Calculate
function evCalc() { var resultDiv = document.getElementById('ev-result');
var batteryCapacity = parseFloat(document.getElementById('ev-battery-capacity').value); var efficiency = parseFloat(document.getElementById('ev-efficiency').value); var unit = document.getElementById('ev-unit').value; var socStart = parseFloat(document.getElementById('ev-soc-start').value); var socReserve = parseFloat(document.getElementById('ev-soc-reserve').value); var tripDistance = parseFloat(document.getElementById('ev-trip-distance').value); var tempFactor = parseFloat(document.getElementById('ev-temp-factor').value) / 100; var hvacFactor = parseFloat(document.getElementById('ev-hvac-factor').value) / 100; var speedFactor = parseFloat(document.getElementById('ev-speed-factor').value) / 100;
// --- Validation --- if (isNaN(batteryCapacity) || batteryCapacity 100) { resultDiv.innerHTML = 'Starting state of charge must be between 1% and 100%.
'; return; } if (isNaN(socReserve) || socReserve = socStart) { resultDiv.innerHTML = 'Reserve SOC must be between 0% and less than starting SOC.
'; return; }
// --- Core Calculations --- // Usable SOC fraction var usableSocFraction = (socStart - socReserve) / 100;
// Usable energy (kWh) var usableEnergy = batteryCapacity * usableSocFraction;
// Combined efficiency factor var combinedFactor = tempFactor * hvacFactor * speedFactor;
// Adjusted efficiency (distance per kWh after all factors) var adjustedEfficiency = efficiency * combinedFactor;
// Estimated range var estimatedRange = usableEnergy * adjustedEfficiency;
// Energy consumption per unit distance (kWh per mile or km) var kwhPerUnit = 1 / adjustedEfficiency;
var unitLabel = unit === 'miles' ? 'mi' : 'km';
var html = '### Results '; html += ''; html += 'Usable Battery Energy' + usableEnergy.toFixed(2) + ' kWh'; html += 'Combined Efficiency Factor' + (combinedFactor * 100).toFixed(1) + '%'; html += 'Adjusted Efficiency' + adjustedEfficiency.toFixed(2) + ' ' + unitLabel + '/kWh'; html += 'Estimated Range' + estimatedRange.toFixed(1) + ' ' + unitLabel + ''; html += 'Energy Consumption' + kwhPerUnit.toFixed(3) + ' kWh/' + unitLabel + ''; html += '';
// --- Trip Planner (if trip distance provided) --- if (!isNaN(tripDistance) && tripDistance > 0) { // Energy needed for full trip var energyNeeded = tripDistance * kwhPerUnit;
// Number of full charges needed (each charge = usableEnergy) // Stops = how many times you need to charge en route (not counting initial charge) var chargingStops = 0; var remainingDistance = tripDistance; var currentRange = estimatedRange;
if (tripDistance '; html += 'Total Energy Required' + energyNeeded.toFixed(2) + ' kWh'; html += 'Your Estimated Range' + estimatedRange.toFixed(1) + ' ' + unitLabel + '';
if (tripDistance Charging Stops Needed0 — You can complete this trip on a single charge! 🎉'; } else { var shortfall = tripDistance - estimatedRange; html += 'Distance Beyond Current Range' + shortfall.toFixed(1) + ' ' + unitLabel + ''; html += 'Estimated Charging Stops' + chargingStops + ' stop(s) (charging to ~80% SOC each)'; }
html += 'Trip Assessment' + tripFeasible + ''; html += '';
// Percentage of range used var rangeUsedPct = (tripDistance / estimatedRange) * 100; html += 'This trip uses approximately ' + rangeUsedPct.toFixed(1) + '% of your adjusted range.
'; }
resultDiv.innerHTML = html; }
#### Formulas Used
Usable Energy (kWh): Usable Energy = Battery Capacity × ((SOC_start − SOC_reserve) / 100)
Combined Efficiency Factor: Combined Factor = Temperature Factor × HVAC Factor × Speed Factor
Adjusted Efficiency (distance/kWh): Adjusted Efficiency = Rated Efficiency × Combined Factor
Estimated Range: Range = Usable Energy × Adjusted Efficiency
Energy Consumption per Unit Distance: kWh/unit = 1 / Adjusted Efficiency
Charging Stops (Trip Planner): If Trip Distance > Range: Remaining = Trip Distance − Range Charge Range = Battery × ((80% − Reserve%) / 100) × Adjusted Efficiency Stops = ⌈Remaining / Charge Range⌉
#### Assumptions & References
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