Charging Time Calculator by EV Model and Charger Level

ANA›Life Services Authority›National Calculator Authority›Charging Time Calculator by EV Model and Charger Level

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Charging Time Calculator by EV Model and Charger Level

Estimate how long it will take to charge your electric vehicle based on the EV model, current battery level, target battery level, and charger type.

EV Model

-- Select EV Model -- Nissan Leaf (40 kWh) Nissan Leaf Plus (62 kWh) Chevy Bolt EV (65 kWh usable 57.5 kWh) Tesla Model 3 Standard Range (75 kWh) Tesla Model 3 Long Range (82 kWh) Tesla Model S/X (100 kWh) Ford Mustang Mach-E (77 kWh) Hyundai Ioniq 5 (77.4 kWh) Kia EV6 (77.4 kWh) Rivian R1T (107.8 kWh) Custom Battery Size

Custom Battery Capacity (kWh)

Current Battery Level (%)

Target Battery Level (%)

Charger Level

-- Select Charger Level -- Level 1 – Standard 120V outlet (~1.4 kW) Level 2 – 240V / 7.2 kW (typical home) Level 2 – 240V / 11.5 kW (faster home/public) Level 2 – 240V / 19.2 kW (commercial) DC Fast Charge – 50 kW (CHAdeMO/CCS) DC Fast Charge – 150 kW (CCS) DC Fast Charge – 250 kW (Tesla Supercharger V3) Custom Charger Power

Custom Charger Power (kW)

Charging Efficiency (%)

Typical onboard charger efficiency is 85–95%. DC fast charging is typically 90–95%.

Calculate Charging Time

function chaUpdateBattery() { var sel = document.getElementById('cha-ev-model').value; var grp = document.getElementById('cha-custom-battery-group'); grp.style.display = (sel === 'custom') ? 'block' : 'none'; }

function chaUpdateCharger() { var sel = document.getElementById('cha-charger-level').value; var grp = document.getElementById('cha-custom-charger-group'); grp.style.display = (sel === 'custom') ? 'block' : 'none'; }

function chaClearErrors() { ['cha-ev-model-err','cha-custom-battery-err','cha-current-soc-err', 'cha-target-soc-err','cha-charger-level-err','cha-custom-charger-err', 'cha-efficiency-err'].forEach(function(id) { document.getElementById(id).textContent = ''; }); }

function chaCalc() { chaClearErrors(); var valid = true;

// --- Battery Capacity --- var evSel = document.getElementById('cha-ev-model').value; var batteryKwh = 0; if (!evSel) { document.getElementById('cha-ev-model-err').textContent = 'Please select an EV model.'; valid = false; } else if (evSel === 'custom') { batteryKwh = parseFloat(document.getElementById('cha-custom-battery').value); if (isNaN(batteryKwh) || batteryKwh 500) { document.getElementById('cha-custom-battery-err').textContent = 'Enter a valid battery capacity between 1 and 500 kWh.'; valid = false; } } else { batteryKwh = parseFloat(evSel); }

// --- Current SOC --- var currentSoc = parseFloat(document.getElementById('cha-current-soc').value); if (isNaN(currentSoc) || currentSoc 99) { document.getElementById('cha-current-soc-err').textContent = 'Current battery level must be between 0% and 99%.'; valid = false; }

// --- Target SOC --- var targetSoc = parseFloat(document.getElementById('cha-target-soc').value); if (isNaN(targetSoc) || targetSoc 100) { document.getElementById('cha-target-soc-err').textContent = 'Target battery level must be between 1% and 100%.'; valid = false; }

if (valid && targetSoc 500) { document.getElementById('cha-custom-charger-err').textContent = 'Enter a valid charger power between 0.1 and 500 kW.'; valid = false; } } else { chargerKw = parseFloat(chargerSel); }

// --- Efficiency --- var efficiency = parseFloat(document.getElementById('cha-efficiency').value); if (isNaN(efficiency) || efficiency 100) { document.getElementById('cha-efficiency-err').textContent = 'Efficiency must be between 50% and 100%.'; valid = false; }

if (!valid) return;

// --- Core Formula --- // Energy needed from battery = batteryKwh * (targetSoc - currentSoc) / 100 // Energy drawn from grid (accounting for losses) = energyNeeded / (efficiency / 100) // Charging time (hours) = energyFromGrid / chargerKw // But charger power is capped by the vehicle's onboard charger (we note this as an assumption)

var socDelta = (targetSoc - currentSoc) / 100; var energyNeeded = batteryKwh * socDelta; // kWh into battery var energyFromGrid = energyNeeded / (efficiency / 100); // kWh drawn from grid var chargingTimeHours = energyFromGrid / chargerKw; // hours

var totalMinutes = chargingTimeHours * 60; var hours = Math.floor(chargingTimeHours); var minutes = Math.round((chargingTimeHours - hours) * 60);

// Cost estimate at average US electricity rate $0.16/kWh var costEstimate = energyFromGrid * 0.16;

// Miles added estimate (avg EV efficiency ~3.5 miles/kWh) var milesAdded = energyNeeded * 3.5;

// Format time string var timeStr = ''; if (hours > 0 && minutes > 0) { timeStr = hours + ' hr ' + minutes + ' min'; } else if (hours > 0) { timeStr = hours + ' hr'; } else { timeStr = minutes + ' min'; }

var resultDiv = document.getElementById('cha-result'); resultDiv.style.display = 'block'; resultDiv.innerHTML = '### Charging Time Estimate ' + '' + 'Battery Capacity' + batteryKwh.toFixed(1) + ' kWh' + 'Charge Needed (' + currentSoc + '% → ' + targetSoc + '%)' + energyNeeded.toFixed(2) + ' kWh' + 'Energy Drawn from Grid' + energyFromGrid.toFixed(2) + ' kWh' + 'Charger Power' + chargerKw.toFixed(1) + ' kW' + 'Charging Efficiency' + efficiency + '%' + 'Estimated Charging Time' + timeStr + '' + 'Estimated Cost (@ $0.16/kWh)$' + costEstimate.toFixed(2) + '' + 'Estimated Miles Added (@ 3.5 mi/kWh)~' + Math.round(milesAdded) + ' miles' + '' + '⚠️ Actual charging time may vary based on your vehicle's onboard charger limit, battery temperature, and charger availability.

'; }

#### Formula

Energy Needed (kWh) = Battery Capacity (kWh) × (Target SOC% − Current SOC%) / 100

Energy from Grid (kWh) = Energy Needed / (Charging Efficiency / 100)

Charging Time (hours) = Energy from Grid / Charger Power (kW)

Example: A 77 kWh EV charging from 20% to 80% on a 7.2 kW Level 2 charger at 90% efficiency: Energy Needed = 77 × 0.60 = 46.2 kWh | Energy from Grid = 46.2 / 0.90 = 51.33 kWh | Time = 51.33 / 7.2 ≈ 7.13 hours (~7 hr 8 min)

#### Assumptions & References

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