What This Calculator Does
The EV Charging Cost per 100 Miles Calculator tells you how much electricity costs to drive your electric vehicle 100 miles. It is a universal tool — just enter your car's efficiency in miles per kWh and your electricity price in dollars (or any currency) per kWh. This makes it easy to compare EV running costs against a gasoline car or between home and public charging rates.
How to Use It
Enter two values: your efficiency (how many miles your EV travels per kWh — most EVs range from 2.5 to 4.5 mi/kWh) and your electricity price per kWh. The calculator instantly returns the cost to drive 100 miles, the energy used, and the cost per single mile.
The Formula Explained
First we find how much energy is needed for 100 miles: divide 100 by your miles-per-kWh efficiency. Then multiply that energy by the price per kWh:
$$\text{Cost} = \left(\frac{100}{\text{mi-per-kWh}}\right) \times \text{price-per-kWh}$$
A lower efficiency means more energy used, so cost rises; a lower electricity price reduces cost proportionally.
Worked Example
Suppose your EV does 3.5 miles per kWh and you pay $0.15 per kWh. Energy for 100 miles = \(100 \div 3.5 = 28.57\) kWh. Cost:
$$28.57 \times 0.15 = \$4.29$$
per 100 miles, or about $0.043 per mile — far cheaper than most gasoline vehicles.
FAQ
What efficiency should I use? Check your car's display or trip computer. Typical real-world values are 2.5–4.5 mi/kWh depending on the model, speed, and weather.
Does this include charging losses? No. Real-world charging is roughly 85–90% efficient, so actual cost can be slightly higher. Use your wall-meter mi/kWh figure for the most accurate result.
Can I use km instead of miles? The result is labeled per 100 miles. If you enter efficiency as km/kWh, treat the answer as cost per 100 km.
