EV Range Calculator: How Far on a Charge
How far will my electric car go on a charge? Enter the battery size, the share you can actually use and your consumption in Wh/km, Wh/mi or mi/kWh, then pick a temperature and a speed profile to see a realistic range. This page answers distance per battery. To find out how long it takes to fill the battery again, use the EV charging time calculator.
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Formula
- Usable energy:
kWh_usable = battery kWh × usable % ÷ 100 - Consumption in Wh/km: Wh/mi ÷ 1.609344, or
1000 ÷ (mi/kWh × 1.609344) - Range:
km = kWh_usable × 1000 ÷ Wh/km × temperature factor × speed factor
Worked example
60 kWh battery, 90% usable, 160 Wh/km: 54 kWh × 1000 ÷ 160 = 337.5 km (209.7 mi). In cold weather (× 0.8) at highway speed (× 0.85) the range is 337.5 × 0.8 × 0.85 = 229.5 km (142.6 mi).
Second example: 40 kWh, 90% usable, 150 Wh/km gives 36 kWh and 240 km (149.1 mi).
Use this when
You want to know whether a car or trip is realistic on one charge: comparing models, planning a winter or motorway journey, or converting an efficiency figure into miles. Typical consumption is roughly 140 to 200 Wh/km for an ordinary electric car, though the range depends on the model.
EV range vs EV charging time
This page converts energy into distance. The charging time calculator converts energy into minutes and cost at a charger. Use range to decide whether you need to stop; use charging time to decide how long the stop takes.
Assumptions
| Factor | Value |
|---|---|
| Hot, above 30 C | 0.92 |
| Cold, around 0 C | 0.80 |
| Freezing, below -10 C | 0.70 |
| Highway 110 to 120 km/h | 0.85 |
| Fast highway 130 km/h or more | 0.75 |
These are assumed typical values, not measurements.
Common mistakes
- Using the gross battery size instead of the usable capacity.
- Mixing Wh/km with mi/kWh: a higher mi/kWh is better, a higher Wh/km is worse.
- Using the brochure figure for winter motorway driving.
Frequently asked questions
How do you calculate EV range?
Range is usable energy divided by consumption. A 60 kWh battery with 90% usable holds 54 kWh; at 160 Wh/km that is 54 000 ÷ 160 = 337.5 km before any weather or speed adjustment.
How much does cold weather reduce range?
Cabin heating and a colder battery commonly cost 10 to 30% of range. This tool assumes 20% around 0 C and 30% below -10 C. These are assumed typical figures, not measurements of your car.
Why does highway driving shorten range?
Air drag rises with the square of speed. This tool assumes 15% less range at 110 to 120 km/h and 25% less at 130 km/h or more. With cold weather (0.8) and highway (0.85) the 337.5 km example drops to 229.5 km.
How do I convert mi/kWh to Wh/km?
Divide 1000 by (mi/kWh × 1.609344). 3.5 mi/kWh is 1000 ÷ 5.633 = 177.5 Wh/km. Lower Wh/km and higher mi/kWh both mean a more efficient car.
How do I calculate EV range from kWh and Wh/km?
Multiply battery kWh by the usable percentage, then divide by consumption. A 40 kWh battery, 90 percent usable, at 150 Wh/km holds 36 kWh and goes 240 km (149.1 miles) in mild weather at moderate speeds.
How do I calculate EV range from mi/kWh?
Multiply usable kWh by mi/kWh. A 60 kWh battery with 90 percent usable (54 kWh) at 4 mi/kWh goes 216 miles, which is 347.6 km. That efficiency equals 155.3 Wh/km.
How much range will I lose in freezing weather?
This tool assumes 30 percent less range below -10 C, a typical figure rather than a measurement. A 77 kWh battery, 95 percent usable at 180 Wh/km, drops from 406.4 km to 284.47 km (176.8 miles).