How to Calculate EV Range: Simple Formula and Example

To calculate an electric vehicle's range, divide the battery capacity (in kilowatt-hours, kWh) by the energy consumption (in kWh per mile or kilometer). The formula is: Range = Battery Capacity ÷ Energy Consumption. This gives the estimated distance the EV can travel on a full charge.

Syntax

The basic formula to calculate EV range is:

Range = Battery Capacity (kWh) ÷ Energy Consumption (kWh per mile or km)

Battery Capacity: Total energy stored in the EV's battery, measured in kilowatt-hours (kWh).

Energy Consumption: How much energy the EV uses to travel one mile or kilometer, usually in kWh/mile or kWh/km.

The result is the estimated distance the EV can travel on a full battery charge.

python

range = battery_capacity / energy_consumption

Example

This example shows how to calculate the range of an EV with a 60 kWh battery and an energy consumption of 0.3 kWh per mile.

python

battery_capacity = 60  # in kWh
energy_consumption = 0.3  # kWh per mile
range_miles = battery_capacity / energy_consumption
print(f"Estimated EV range: {range_miles:.1f} miles")

Output

Estimated EV range: 200.0 miles

Common Pitfalls

• Ignoring real-world factors: Weather, driving style, and terrain affect energy consumption, so calculated range is an estimate.
• Using wrong units: Make sure battery capacity and energy consumption use compatible units (kWh and kWh/mile or kWh/km).
• Assuming full usable battery: Some EVs reserve part of the battery to protect it, so usable capacity may be less than total capacity.

python

wrong_energy_consumption = 30  # Incorrect: should be in kWh per mile, not Wh
correct_energy_consumption = 0.3  # Correct
range_wrong = 60 / wrong_energy_consumption  # Gives wrong result
range_correct = 60 / correct_energy_consumption
print(f"Wrong range: {range_wrong}")
print(f"Correct range: {range_correct}")

Output

Wrong range: 2.0
Correct range: 200.0

Quick Reference

Term	Description	Unit
Battery Capacity	Total energy stored in battery	kWh
Energy Consumption	Energy used per distance	kWh/mile or kWh/km
Range	Estimated travel distance on full charge	miles or km

Key Takeaways

Calculate EV range by dividing battery capacity by energy consumption.

Use consistent units: kWh for capacity and kWh per mile or km for consumption.

Real-world range varies due to driving conditions and battery usability.

Check if battery capacity is total or usable for accurate range estimates.