How do I find my EV's battery capacity?

Battery capacity (in kWh) is listed in your vehicle's spec sheet or owner's manual. Common values range from 40 kWh (small city EVs) to 100+ kWh (long-range models). Use the usable capacity, not gross capacity, for accurate estimates.

What is a typical efficiency for an EV?

Most EVs achieve between 2.5 and 4.5 mi/kWh (4–7 km/kWh) under normal conditions. Compact and mid-size EVs tend to be more efficient than large SUVs or trucks. Your on-board display or trip computer shows real-time efficiency.

Why does cold weather reduce EV range?

Low temperatures reduce lithium-ion battery capacity and increase energy use for cabin heating. Range can drop 20–40% in freezing conditions. The climate adjustment factor in this calculator models this loss.

Does highway driving use more range than city driving?

Yes. Unlike combustion cars, EVs are often more efficient in city traffic because regenerative braking recovers energy. At highway speeds (70+ mph), aerodynamic drag rises sharply and efficiency drops. The speed factor accounts for this.

What is the difference between gross and usable battery capacity?

Gross capacity is the total pack size; usable capacity is what the car actually allows you to use (typically 90–95% of gross). Always use usable capacity for range estimates.

Can I enter efficiency in km/kWh instead of mi/kWh?

Yes. Toggle the unit selector to km/kWh and all inputs and outputs will switch to kilometers automatically.

EV Range Calculator

Name: EV Range Calculator
Availability: InStock
Author: Nham Vu

Enter your EV battery size and efficiency to instantly estimate driving range in miles and kilometers, with optional climate and speed adjustments.

EV Parameters

Distance Unit

Battery Capacity (kWh)

Usable capacity from your vehicle spec sheet

Efficiency (mi/kWh)

Find this in your trip computer or manufacturer specs

Climate Adjustment

Speed / Drive Cycle

Enter your battery capacity and efficiency to estimate range.

Summary

Enter your EV battery size and efficiency to instantly estimate driving range in miles and kilometers, with optional climate and speed adjustments.

How it works

Enter your battery capacity in kilowatt-hours (kWh) — find this in your vehicle spec sheet.
Input your efficiency in miles per kWh (mi/kWh) or kilometers per kWh (km/kWh).
Select a climate factor to account for temperature-related range loss (cold weather reduces battery range).
Select a speed factor to reflect highway vs. city driving efficiency differences.
Click Calculate to see your estimated range in both miles and kilometers.

Use cases

Estimate whether your EV can complete a planned road trip on a single charge.
Compare range across different driving conditions before purchasing an EV.
Understand the impact of cold weather on your EV battery range.
Plan charging stops for long-distance trips based on realistic range.
Evaluate efficiency figures quoted by manufacturers against real-world conditions.
Compare kWh efficiency between different EV models.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu