EV Range Calculator

EV Range Calculator works out how far an electric car or scooter can go on the charge it has. Enter the battery’s usable capacity in kWh, the charge now, the reserve you would rather not drive below (10% is a common margin to reach a charger comfortably), and the energy the vehicle uses — in watt-hours per kilometre or kilometres per kWh, both shown by most trip computers. The range is the energy between your charge and your reserve divided by the energy used per kilometre. Because the energy use changes so much with how and where you drive, it also shows the range if the vehicle uses 10% and 20% more, as it does on a fast highway, with the AC on full, uphill or fully loaded. The certified range (tested on India’s MIDC cycle by ARAI) is measured in gentle test conditions, so real driving usually gets less: use your own average for the honest figure.

1. Enter the usable battery capacity.
2. Enter the charge now and the reserve to keep.
3. Enter the energy use from the trip computer, in either unit.
4. Read the range, and the range with harder driving.

• Batteries hold a little less as they age and in cold weather.
• Displayed charge is the car’s own estimate; the last few per cent are not always usable.
• Everything is worked out in your browser. Nothing is sent anywhere.

Usable kWh × 1000 ÷ Wh per km. A 30 kWh car using 140 Wh/km goes about 214 km from 100% to 0%.

The claimed range comes from a test cycle with moderate speeds and no AC; highways, AC and load all use more energy.

The energy used to drive one kilometre. Lower is better; small cars use 110–160 Wh/km, scooters 25–40.

To reach a charger even if the trip uses more than expected, or the charger you planned is busy.