EV Range & Efficiency Converter

Type in any box — the others update instantly.

Distance / range

Convert a range figure between miles and kilometres.

mi
km

Efficiency / consumption

Convert between the four units carmakers and reviewers use.

mi/kWh — higher is better
kWh/100km — lower is better
Wh/mi — lower is better
EPA equivalent — higher is better

Conversions use the exact definition of 1 mile = 1.609344 km. MPGe uses the US EPA equivalence of 33.705 kWh per US gallon of gasoline. Efficiency figures here are vehicle consumption — real charging costs run roughly 10–15% higher because of charging losses. For what that costs you at home versus on a public network, use the home vs public charging calculator. Need kW to hp, psi to bar, °F to °C or a full table of efficiency units? Use the EV Unit Converter.

Calculate Real-World Range

Factor in weather, driving style, and conditions for accurate estimates

Vehicle Information

Official 2024-2025 EPA rating
Starting charge level

Weather Conditions

Ideal
70°F
Hot
95°F
Cold
20°F
Extreme
5°F
Outside temperature

Driving Conditions

Driving Style Normal
Eco Normal Aggressive
Highway Driving (%) 50%
Overall trip average

Vehicle Load

Including driver
Additional weight
Calculate to see range
Enter your conditions above
342
EPA Range (miles)
100%
vs EPA Rating

Range Visualization

0 mi 342 mi
Your estimated range

Factors Affecting Your Range

Data Sources

Range calculations based on research from Consumer Reports, AAA, Geotab (5.2M trips), Recurrent Auto (18,000+ vehicles), and EPA testing data. Temperature impacts from real-world studies show 25-40% range loss in cold weather.

70°F Ideal
100-115% range
95°F Hot
85-90% range
20°F Cold
60-75% range
5°F Extreme
45-55% range

Trip Range Planner

Plan your route and check if you can make it without charging

Maximize Your EV Range

Precondition Your Battery

Heat or cool your EV while plugged in to preserve battery for driving. Can save 15-20% battery power.

Drive Efficiently

Maintain steady speeds, use cruise control, and anticipate stops. Eco mode can improve range by 10-15%.

Optimize Climate Control

Use seat and steering wheel heaters instead of cabin heating. Heat pumps are 300% more efficient than resistance heating.

Cold Weather Strategy

Park in garage when possible, warm up while plugged in, and expect 25-40% range reduction in freezing temperatures.