EV Range Calculator

To estimate EV range, multiply usable battery capacity by driving efficiency in miles per kWh. A 60 kWh battery with 90% usable capacity holds 54 usable kWh. At a typical 3.5 miles per kWh, that gives about 189 miles of range (304 km). The calculator above returns range in both miles and kilometers, plus the usable energy and the energy used per 100 miles.

Real range depends far more on efficiency than on battery size alone. The same 60 kWh pack delivers 240 miles in an aerodynamic sedan at 4.0 mi/kWh but only 150 miles in a boxy truck at 2.5 mi/kWh. Speed, temperature, terrain, and climate control all move efficiency, so entering a realistic mi/kWh for your driving matters more than the headline EPA number. To plan the charging behind that range, use the EV charging time calculator.

The equation used by this calculator is:

Each term drives the result:

• Battery kWh — the pack's total capacity. Bigger packs carry more energy and therefore more range, all else equal.
• Usable percentage — automakers reserve a buffer at the top and bottom of the pack to protect longevity, so a "64 kWh gross" battery might offer about 58 kWh usable. Use 90% as a reasonable default when the usable figure is unknown.
• Efficiency (miles per kWh) — how far the car travels on one kilowatt-hour. This is the biggest lever: efficient EVs exceed 4 mi/kWh, while heavy trucks at highway speed can drop to 2 mi/kWh.

Multiplying usable energy by miles per kWh gives range directly. The inverse of efficiency, energy per 100 miles, is a useful comparison metric the calculator also reports — lower is better, like a car's fuel consumption. To translate that energy into charging cost, pair this with the EV charging cost calculator.

These examples show how efficiency and usable capacity reshape range for different vehicles.

Example 1 — 60 kWh compact EV at 3.5 mi/kWh, 90% usable: Usable energy = 60 × 0.90 = 54 kWh. Range = 54 × 3.5 = 189 miles (304 km). Energy per 100 miles = 100 ÷ 3.5 = 28.6 kWh. This is a typical everyday commuter figure.

Example 2 — 100 kWh luxury SUV at 3.0 mi/kWh, 95% usable: Usable = 100 × 0.95 = 95 kWh. Range = 95 × 3.0 = 285 miles (459 km). The bigger battery buys long range despite lower efficiency, at the cost of weight and price.

Example 3 — 77 kWh sedan on the highway at 3.0 mi/kWh vs city at 4.2 mi/kWh: At 90% usable (69.3 kWh), highway range = 69.3 × 3.0 = 208 miles, but efficient city driving = 69.3 × 4.2 = 291 miles. The same car swings 80+ miles based on how and where you drive.

Example 4 — 131 kWh electric truck at 2.2 mi/kWh, 92% usable: Usable = 131 × 0.92 = 120.5 kWh. Range = 120.5 × 2.2 = 265 miles. Towing or hauling can cut truck efficiency to 1.5 mi/kWh or below, roughly halving range — a key planning factor for work use.

Miles per kWh is not a fixed number; it moves with conditions, and understanding the drivers lets you set a realistic value.

Speed and aerodynamics. Aerodynamic drag rises with the square of speed, so highway cruising at 75 mph uses far more energy per mile than 55 mph. This is why EVs, unlike gas cars, often show lower range on the highway than in the city.

Temperature. Cold weather is the biggest range killer. Battery chemistry slows in the cold, and cabin heating draws several kilowatts. Winter range can fall 20–40% versus mild weather. Heat pumps and preconditioning while plugged in soften the hit.

Terrain and load. Climbing hills, carrying passengers, and towing all raise energy per mile. Regenerative braking recovers some energy on descents, which is why hilly routes net out better than they feel.

Driving style and tires. Hard acceleration, underinflated tires, and roof racks all cut efficiency. Smooth driving and correct tire pressure can add 10–15% range for free. When estimating, pick a mi/kWh that matches your typical conditions rather than the best-case EPA rating — then use the EV charging cost calculator to see the cost per mile that efficiency implies.

1. Enter battery capacity in kWh. Use the usable figure if you have it; otherwise the gross capacity with a usable percentage below handles the buffer.
2. Enter driving efficiency in miles per kWh. Check your car's trip computer for a real average. Use 3.5 as a general default, 4.0+ for an efficient sedan, or 2.5 for a truck or highway driving.
3. Set usable capacity. Use 90% as a default if you entered gross capacity, or 100% if you already entered the usable figure.

The result shows range in miles and kilometers, usable energy, and energy per 100 miles. Lower the efficiency to model winter or highway driving, or raise it for gentle city commuting, to see your realistic range envelope. Once you know the range you need, the EV charging time calculator shows how long to refill it and the home EV charger amp calculator sizes the circuit to do so.

The range on the window sticker is a standardized test figure, and your real range will differ, sometimes a lot. Knowing why helps you set expectations and inputs.

EPA and WLTP ratings. The US EPA and European WLTP cycles mix city and highway driving under controlled conditions. They are useful for comparing cars but assume moderate temperatures and speeds. WLTP figures tend to run optimistic versus EPA for the same car.

Highway penalty. Because most rating cycles weight city driving, EVs often fall short of their rated range on a steady highway trip at 70–75 mph. Planning a road trip on 80–90% of the rated range is prudent.

Winter and degradation. Cold weather and long-term battery degradation both trim usable range. After several years a pack may hold 90% of its original capacity; enter that in the usable field for an aged-battery estimate.

This calculator lets you build these realities in: enter your observed mi/kWh and a usable percentage that reflects your battery's health and conditions, rather than trusting a single sticker number. The result is a range you can actually plan around, and pairing it with the battery runtime calculator extends the same energy thinking to other battery systems.

The table shows estimated range (miles) for common battery sizes across a range of efficiencies, assuming 90% usable capacity. Use it as a fast sanity check against the live calculator.

Notice how efficiency and battery size trade off: a 60 kWh pack in an efficient car can outrange a 75 kWh pack in an inefficient one. When shopping, compare cars on efficiency (mi/kWh) as well as battery size, because efficiency also determines charging cost per mile and how far each fast-charge stop takes you.

Because range is efficiency multiplied by usable energy, anything that raises miles per kWh directly extends how far you go on a charge — often by 10–20% with no hardware changes.

Moderate your speed. Aerodynamic drag climbs with the square of velocity, so easing off from 75 to 65 mph on a long highway leg can add 10–15% range. On road trips this often means one fewer charging stop.

Use regenerative braking. Lifting off early and letting regen slow the car recovers energy that friction brakes would waste as heat. One-pedal driving in stop-and-go traffic is where EVs shine and why city efficiency usually beats highway.

Precondition while plugged in. Heating or cooling the cabin and warming the battery from grid power, before you unplug, means that energy does not come out of the pack. In winter this alone can preserve a meaningful chunk of range.

Mind tires and cargo. Underinflated tires, roof racks, and unnecessary weight all cut efficiency. Correct pressure and removing an unused roof box are free range. Eco driving modes cap acceleration and climate draw to stretch the last miles when you are cutting it close.

Enter a higher mi/kWh above to see the payoff of efficient driving, or a lower one to model a worst-case winter highway run. The gap between the two is your practical planning envelope, and pairing it with the EV charging time calculator tells you how long each refill takes.

For road trips, plan legs around 70–80% of your realistic range rather than the maximum, leaving a safety buffer for detours, headwinds, and the fact that fast charging is slowest at very low state of charge. Arriving at a charger with 10–20% left keeps the session in the fast part of the charge curve and avoids range anxiety. Enter your highway mi/kWh, not your city average, when sizing trip legs — the difference of a single mile per kWh can move a leg by 50 miles or more.

• Using gross capacity as usable. Automakers reserve a buffer; apply a usable percentage or the range will read high.
• Trusting a single EPA number. Highway speed, cold, and terrain can cut real range 20–40% below the rating.
• Assuming highway range beats city range. For EVs it is usually the reverse, because drag dominates at speed.
• Ignoring degradation. An older pack holds less; lower the usable percentage for an aged battery.
• Forgetting climate and cargo loads. Heating, towing, and roof racks all cut miles per kWh noticeably.

For the full ownership picture, combine range with the EV charging time calculator, the EV charging cost calculator, and the electricity cost calculator.