EV Range and Charging Time Calculator

ANA›Life Services Authority›National Calculator Authority›EV Range and Charging Time 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 Charging Time Calculator

Estimate how far your electric vehicle can travel on a full charge and how long it will take to charge from a given state of charge to your target level.

### Battery & Vehicle

Usable Battery Capacity (kWh)

Energy Consumption (miles/kWh or km/kWh)

Distance Unit

Miles Kilometres

### Charging

Charger Power (kW)

Charger Efficiency (%)

Current State of Charge (%)

Target State of Charge (%)

Calculate

Estimated Range (Full Charge) —

Range at Current SOC —

Energy Needed to Charge —

Charging Time —

Range Added by Charging —

function evCalc() { const errEl = document.getElementById('ev-error'); const resEl = document.getElementById('ev-result'); errEl.style.display = 'none'; resEl.style.display = 'none';

// --- Read inputs --- const capacity = parseFloat(document.getElementById('ev-battery-capacity').value); const efficiency = parseFloat(document.getElementById('ev-efficiency').value); const unit = document.getElementById('ev-unit').value; const chargerKW = parseFloat(document.getElementById('ev-charger-power').value); const chargerEff = parseFloat(document.getElementById('ev-charger-efficiency').value); const socStart = parseFloat(document.getElementById('ev-soc-start').value); const socTarget = parseFloat(document.getElementById('ev-soc-target').value);

// --- Validation --- const errors = []; if (isNaN(capacity) || capacity 100) errors.push('Charger efficiency must be between 50% and 100%.'); if (isNaN(socStart) || socStart 99) errors.push('Current SOC must be between 0% and 99%.'); if (isNaN(socTarget) || socTarget 100) errors.push('Target SOC must be between 1% and 100%.'); if (!isNaN(socStart) && !isNaN(socTarget) && socTarget 0) { errEl.innerHTML = errors.map(e => '⚠ ' + e + '

').join(''); errEl.style.display = 'block'; return; }

// --- Formulas --- // Full-charge range // Range = Capacity (kWh) × Efficiency (dist/kWh) const rangeFull = capacity * efficiency;

// Range at current SOC // Range_now = Capacity × (SOC_start / 100) × Efficiency const rangeNow = capacity * (socStart / 100) * efficiency;

// Energy needed from the grid (accounting for charger efficiency losses) // Energy_grid = Capacity × (SOC_target - SOC_start) / 100 / (chargerEff / 100) const deltaSOC = (socTarget - socStart) / 100; const energyBattery = capacity * deltaSOC; // kWh into battery const energyGrid = energyBattery / (chargerEff / 100); // kWh from grid

// Charging time // Time (h) = Energy_grid (kWh) / Charger_power (kW) const timeHours = energyGrid / chargerKW; const timeMinutes = timeHours * 60;

// Range added by charging session const rangeAdded = energyBattery * efficiency;

// --- Format helpers --- const distLabel = unit === 'miles' ? 'mi' : 'km';

function fmtDist(v) { return v.toFixed(1) + ' ' + distLabel; } function fmtTime(h) { if (h = 100) { note = '⚡ DC fast charging detected. Note that most EVs taper charge rate above 80% SOC, so actual time above 80% may be longer.'; } else if (chargerKW

#### Formulas Used

Full-Charge Range

Range = Usable Capacity (kWh) × Efficiency (dist / kWh)

Range at Current SOC

Range_now = Usable Capacity × (SOC_start / 100) × Efficiency

Energy Required from Grid

ΔEnergy_battery = Usable Capacity × (SOC_target − SOC_start) / 100 Energy_grid = ΔEnergy_battery / (Charger Efficiency / 100)

Charging Time

Time (hours) = Energy_grid (kWh) / Charger Power (kW) Time (minutes) = Time (hours) × 60

Range Added

Range_added = ΔEnergy_battery × Efficiency

#### Assumptions & References

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References

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