EV Energy Consumption Calculator

How to calculate EV consumption

1. Enter the distance driven and select kilometres or miles.
2. Enter energy used in kWh for that distance. Use an energy reading, not charger power, battery capacity or a charge percentage.
3. Read the result in your preferred unit. Open calculation details for the formula and other unit formats.

A simple calculation with clear units

• Two measurements are enough: distance driven and energy used in kWh.
• Choose a familiar consumption or distance-per-energy unit without changing the original measurements.
• Keep equivalent units and the calculation method in a compact details section.
• Copy or print a current summary that includes the inputs and measurement limits.

When this helps

• Work out an average rate from an EV's energy record and the corresponding distance.
• Express a measured journey in kWh/100 km, Wh/km, Wh/mi, km/kWh or mi/kWh.
• Review comparable observation intervals while keeping their energy source and driving conditions in mind.

Understand the energy figure before comparing results

kWh measures energy; kW measures power. A charger's power rating, the battery's full capacity and a charge percentage are not energy used over the distance you entered.

Vehicle energy records and charging-meter readings describe different measurement boundaries. Meter readings may include charging losses. The calculator does not add or remove losses or identify the source of your reading.

For vehicle records, use the net energy figure for the same interval according to the display’s own definition. Charging records only describe energy for a driven interval when that energy is attributable to it with comparable starting and ending stored energy. An unrelated top-up and a trip distance do not establish measured driving consumption.

Energy-per-distance figures and distance-per-energy figures are reciprocal. To combine compatible intervals, total their energy and distance before dividing; do not average individual rates directly. Keep source and conditions comparable.

Worked examples

100 km and 18 kWh give 18 kWh/100 km, or 180 Wh/km. The same observations give about 5.56 km/kWh or 3.45 mi/kWh.

100 miles and 20 kWh give 5 mi/kWh, 200 Wh/mi and about 12.43 kWh/100 km. A mile is 1.609344 kilometres.

Compatible records of 100 km with 20 kWh and 200 km with 30 kWh total 300 km and 50 kWh: about 16.67 kWh/100 km, not the simple average of 20 and 15.

What this result does not establish

The arithmetic describes your entered distance and energy. It does not verify the reading, adjust weather or driving conditions, establish battery health or produce an official EPA or WLTP rating.

It does not predict remaining range, charging time, charging losses, electricity cost or a safe reserve. Plug-in hybrids using both electricity and fuel cannot have their complete energy efficiency described by this electrical figure alone.

This version requires positive distance and positive energy. A zero or negative net reading is unsupported; do not replace it with a made-up positive value. Results are approximate and very small positive values are not shown as zero.

Your calculation inputs

Inputs stay in page memory. The tool adds no vehicle lookup, upload, saved record or share link containing them. Copy and print happen only when requested.

The surrounding website can make normal requests under its existing consent and analytics settings. Local arithmetic is not whole-site privacy certification.