EV Range Calculator
Estimate your electric vehicle’s real-world range by factoring in battery size, efficiency, temperature, and driving style — plan your trip with confidence.
EV Range Calculator
Battery · Efficiency · Temperature · Style
Estimate only. Actual range varies with speed, payload, HVAC use, and terrain.
How It Works
Base range is calculated from battery capacity and rated efficiency. Two derating factors are then applied: a temperature factor (cold reduces range up to 30%; heat above 35°C reduces it mildly) and a driving-style factor (aggressive driving can cut range by 18%; eco driving can extend it 8%).
How to Use This Calculator
- Enter your EV's usable battery capacity in kWh from the spec sheet or owner's manual.
- Select your efficiency unit (kWh/100 km or mi/kWh) and enter the rated value.
- Enter the current ambient temperature — this has the biggest single impact on range.
- Select your expected driving style: eco for gentle city driving, aggressive for fast highway.
- Click Estimate Range to see predicted range in km and miles with the applied derating breakdown.
Worked Example
Reference Table
| Temperature | Temp Derating | Range Impact | Notes |
|---|---|---|---|
| −20°C / −4°F | ×0.70 | −30% | Battery severely cold; cabin heat load high |
| −10°C / 14°F | ×0.78 | −22% | Significant cold effect |
| 0°C / 32°F | ×0.85 | −15% | Freezing; seat/steering heat adds load |
| 10°C / 50°F | ×0.92 | −8% | Mild cold; some efficiency loss |
| 20°C / 68°F | ×1.00 | Baseline | Optimal range conditions |
| 25°C / 77°F | ×1.00 | Baseline | Peak range zone |
| 35°C / 95°F | ×0.97 | −3% | AC load; minimal battery impact |
| >40°C / 104°F | ×0.94 | −6% | High AC load; thermal management active |
Frequently Asked Questions
Why does cold weather reduce EV range so much?
Lithium-ion batteries lose capacity when cold because ion transport through the electrolyte slows dramatically at low temperatures. Additionally, EVs must heat the cabin electrically (no waste engine heat), which can consume 3–5 kW — a huge load on the traction battery. Pre-conditioning the car while still plugged in mitigates this substantially.
What is a typical real-world efficiency for a modern EV?
Compact EVs (e.g., Model 3, IONIQ 6) typically achieve 14–17 kWh/100km in mixed driving, equivalent to 3.6–4.4 mi/kWh. Larger SUVs and trucks range from 20–28 kWh/100km. Your trip computer's long-term average is the most accurate source for your specific vehicle and driving patterns.
How does driving speed affect EV range?
Aerodynamic drag increases with the square of speed, so highway driving at 120 km/h can cut range by 20–25% compared to 90 km/h. At 140 km/h the penalty can reach 35%. The "aggressive" style setting approximates sustained highway speeds above 110 km/h.
Is the stated WLTP or EPA range accurate?
EPA range estimates are generally within 5–10% of real-world results for typical driving in moderate climates. WLTP figures tend to be 10–20% optimistic for real-world use. In cold climates or at highway speeds, actual range can be 20–35% below the rated figure.
