EV Driving Range & Energy Consumption Simulator

Estimate the energy consumption (Wh/km) and driving range of a battery electric vehicle from its battery, vehicle data, drive cycle and ambient temperature. The tool visualises the full energy balance, including aerodynamic drag, rolling resistance and HVAC auxiliary power, for quick design or purchase comparisons.

Parameters

Battery capacity

kWh

Nominal capacity (Nissan Leaf 40, Tesla Model 3 LR 75, Lucid Air 118)

Vehicle mass m

Curb weight incl. battery (compact 1100, midsize 1800, SUV 2500, Hummer EV 4100)

Drag coefficient C_d

Lucid Air 0.20, Tesla Model S 0.21, SUV 0.30–0.35, kei truck 0.45

Frontal area A

m²

Sedan 2.2–2.4, SUV 2.6–2.9, pickup truck 3.0–3.5 m²

Rolling resistance C_rr

Low-RR tire 0.006–0.008, normal 0.010–0.012, winter studless 0.015

Drive cycle

Average speed and traffic pattern of the test cycle

HVAC / auxiliary power

A/C, heater and electronics (summer A/C ≈ 1000 W, winter heating ≈ 3000 W)

Ambient temperature T

°C

HVAC load is corrected against a 22 °C baseline (+40% per ±10 °C deviation)

Results

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Aero drag F_aero (N)

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Rolling F_roll (N)

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Consumption (Wh/km)

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Driving range (km)

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CO₂ emissions (g/km)

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Fast charge to 60% (h)

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EV in motion — drag, rolling resistance and battery state

The car is shown with the aerodynamic drag force (red arrow), rolling resistance (green arrow), live power counter and battery charge bar that drains in time with the cruise speed.

Energy consumption vs speed (aero-dominated region)

Energy breakdown by drive cycle (aero / rolling / aux)

Theory & Key Formulas

$$F_{total} = \frac{1}{2}\rho C_d A v^2 + m g C_{rr},\quad E_{km} = \frac{P_{total}}{v \cdot \eta_{drive} \cdot \eta_{bat}},\quad R = \frac{E_{useful}}{E_{km}}$$

P_total = tractive power + HVAC, η = drive-train and battery efficiency, E_useful = usable battery energy. Because aerodynamic drag scales with v², energy per kilometre rises sharply with cruise speed.

EV Driving Range & Energy Consumption — Designing the Energy Balance

🙋

Brochures often quote things like "WLTP 580 km", but I keep hearing you can't actually do that on the motorway. Is that really true?

🎓

Yes, very true. Hitting the catalog number in real driving is the exception. The driving range is set by four things: (1) aerodynamic drag, (2) rolling resistance, (3) acceleration and grade, and (4) HVAC auxiliary power. WLTP averages only 47 km/h, so as soon as you cruise at 120 km/h, aero drag almost doubles your Wh/km. A WLTP-580 car will easily fall to 400 km on a long motorway run and to the 300 km range in winter with heating – that is the norm, not the exception.

🙋

Wait, doubling? When I drag the drive-cycle selector over to Highway the Wh/km shoots up. Is speed really that brutal?

🎓

Aero drag goes as F = 0.5·ρ·Cd·A·v², so it scales with v². Power needed to push the car is P = F·v, which means the aero component of power scales with v³. A Tesla-class sedan that needs about 107 Wh/km at 47 km/h can spike to roughly 5–6× the aero power at 120 km/h. That is not bad driving – it is a hard physical wall. That is why Lucid Air and Tesla Model S push Cd down to 0.20–0.21: there is real range to be won simply by shaping the body.

🙋

And in winter range drops a lot too. Is that also a drag effect?

🎓

No, that one is different. Two effects dominate cold-weather loss: cell chemistry and HVAC. Lithium-ion cells lose 10–20% usable power below freezing because the internal resistance rises. And unlike a gasoline car that gets cabin heating "for free" from engine waste heat, an EV has to spend 2–5 kW of battery power on PTC heaters or a heat pump. Together that gives a 30–40% range drop. Pull the temperature down to −10 °C and the HVAC slider up to 3500 W in this tool – you can watch the range number crash.

🙋

So just looking at battery capacity when buying an EV is meaningless?

🎓

Mostly, yes. Adding kWh adds weight, which raises rolling resistance and acceleration energy, so range scales worse than linearly with capacity. The proper figure of merit is energy consumption (Wh/km). Lucid Air sits around 110 Wh/km, Tesla Model 3 LR about 130, the Hummer EV near 280. Two cars with the same battery can easily have 2–3× different real ranges. The four levers are (1) curb weight, (2) Cd × A, (3) tire Crr and (4) motor + inverter efficiency. Picking an SUV body inflates both A and Cd, so even with the same battery the range typically drops 25–30%.

🙋

What about fast charging? People keep talking about 800 V – why the higher voltage?

🎓

Charge power is P = V·I, so to push the same kilowatts at higher voltage you need less current. A 150 kW pump on a 400 V pack means 375 A – thick, hot, heavy cables. Move to 800 V (Porsche Taycan, Hyundai E-GMP, Kia EV6) and you only need 188 A for the same power, so 350 kW becomes practical. The fast-charge time this tool shows assumes a 150 kW DC station for the first 60% of the battery; an 800 V car at a 350 kW pump can typically halve that.

FAQ

The driving resistances – aerodynamic drag F_aero = 0.5·ρ·Cd·A·v² and rolling resistance F_roll = m·g·Crr – give the tractive power P = F·v. Dividing by the drive-train efficiency η_drive and battery efficiency η_bat yields the battery-side power draw P_batt. Dividing again by speed gives the per-km energy consumption E_km (Wh/km), and the usable battery capacity divided by E_km gives the range R. This tool uses the average speed of each test cycle (WLTP, city, highway, cruise) for the calculation.

Aerodynamic drag is proportional to v², and tractive power is F·v, so drag power grows with v³. A sedan that needs 130 Wh/km at 60 km/h can easily climb to 200–250 Wh/km at 120 km/h, with the aero share alone going up roughly 8×. Highway range typically drops to 60–70% of the WLTP figure, which is a bigger effect than temperature or load.

Each cycle uses a different speed profile, environment and HVAC treatment. WLTP (EU/JP) averages 47 km/h with a 131 km/h peak – relatively strict. US EPA further derates the WLTP-style result to about 70–85%. China's CLTC is city-biased with lower average speed, giving 15–30% more optimistic numbers than WLTP. The same vehicle can be listed as EPA 480 km / WLTP 580 km / CLTC 700 km – a methodology gap, not a technology gap.

Two reasons: (1) Lithium-ion cells have higher internal resistance at low temperature, reducing usable power by 10–20%. (2) Cabin heating cannot use waste heat as a gasoline car does, so a heat pump or PTC heater pulls 2–5 kW of battery power directly. At −10 °C the range often drops to 60–70% of the WLTP value. Very hot summer days (over 35 °C) also incur a 10–15% penalty from battery cooling and AC. This tool approximates the temperature effect by scaling HVAC power around a 22 °C baseline.

Real-World Applications

Vehicle-level energy-balance design: BEV programmes start by working backwards from a target range to a battery size. Volume cars such as Toyota bZ4X, Hyundai Ioniq 5 and VW ID.4 carry 70–80 kWh in a 1700–2000 kg body to reach a WLTP 450–500 km figure. Engineers use an energy-balance model like this tool to fix Cd, A and Crr targets first, then hand them down to the aero, chassis and tire teams.

Operating cost and total cost of ownership: Fleet, company-car and car-share evaluations multiply yearly distance by Wh/km to compute annual energy, cost and CO₂. This tool assumes 0.15 USD/kWh and 400 g CO₂/kWh, but Japan (≈25 JPY/kWh and 450 g CO₂/kWh) and grids with a high renewable share give very different numbers. In a 10-year ICE-vs-EV TCO study, Wh/km and charging-infrastructure access dominate.

Long-distance trip planning: When driving 500 km or more, you must combine state-of-charge, charger locations and seasonal Wh/km. Using this tool to estimate winter and summer consumption, then overlaying Tesla Supercharger, IONITY or e-Mobility Power maps, lets you predict the number of stops and the total trip time accurately. With 800 V platforms (Hyundai E-GMP, Porsche Taycan) and 350 kW pumps, a 10–20 minute stop is enough and the time gap to gasoline cars narrows sharply.

Comparing brochures objectively: Two "WLTP 500 km" cars are not the same car. Tesla Model 3 LR (75 kWh, Cd 0.23), Mercedes EQS (108 kWh, Cd 0.20) and BYD Han (85 kWh, Cd 0.23) behave very differently in real traffic. Plug in their specs here and you can see the energy-design choices behind the headline number. A heavy SUV (BMW iX, ≈2500 kg) and a light sedan (Tesla Model 3, ≈1800 kg) diverge especially fast at motorway speeds.

Common Misconceptions

The biggest one is "bigger battery means longer range". More capacity helps, of course, but cells weigh roughly 6–7 kg per kWh, so a 100 kWh pack adds 600–700 kg, basically a small car's worth of mass. That extra weight raises rolling resistance and acceleration energy. Lucid Air reaches WLTP 800 km on 118 kWh because it pairs that with Cd 0.20 and ≈98% peak motor efficiency. Drop the same pack into a heavy SUV like the BMW iX and you get only about 600 km.

The second is "the WLTP number is achievable on the road". WLTP assumes 47 km/h average, A/C off, 22 °C and a full pack. Real driving adds higher speed, HVAC, temperature, occupants, luggage, elevation and wind, and 20–40% loss is typical. The US EPA already knows this and derates the WLTP-style result to 70–85%. In Japan, plan on 70% of WLTP for highway use and 60% for winter.

The third is "daily DC fast charging is harmless". Lithium-ion cells age faster under high C-rate fast charging combined with high SOC (above 80%). Tesla, Porsche and others taper the DC charge curve aggressively above 80%. That is also why this tool reports the time to 60% rather than 100% – beyond 80% you typically spend 2–3× longer per kWh. Best practice is to fast-charge only on long trips and keep daily charging on 3–7 kW AC, mostly between 20% and 80%.

EV Driving Range & Energy Consumption Simulator

EV Driving Range & Energy Consumption — Designing the Energy Balance

FAQ

Real-World Applications

Common Misconceptions

How to Use

Worked Example

Practical Notes