Global Fuel CalculatorkWh to MPG (MPGe) Converter for Electric Cars
Electric cars don't burn gallons, so their efficiency is quoted in a different language: kWh per 100 miles or 100 km in most of the world, and MPGe in the US. This converter moves between all three, which makes it possible to put an EV beside a petrol car and ask a fair question: which one uses less energy for the same trip?
MPGe treats 33.705 kWh as the energy in one US gallon of petrol, the figure the US EPA uses, and then counts how many miles the car covers on that much energy. An EV using 34 kWh per 100 miles covers 100 miles on just over one gallon's worth of energy, which is about 99 MPGe.
kWh to MPG (MPGe) Converter
The conversion formula
MPGe = 3,370.5 ÷ kWh per 100 miles
Worked example: 34 kWh/100mi = 99.13 MPGe
kWh to MPG (MPGe) conversion table
| kWh/100mi | kWh/100km | MPGe |
|---|---|---|
| 25 | 15.53 | 134.82 |
| 28 | 17.40 | 120.38 |
| 30 | 18.64 | 112.35 |
| 32 | 19.88 | 105.33 |
| 34 | 21.13 | 99.13 |
| 36 | 22.37 | 93.63 |
| 40 | 24.85 | 84.26 |
How to use the kWh to MPG (MPGe) Converter
- Enter your value. Type the figure you want to convert, in kWh/100 miles.
- Check the units. Make sure "From" shows kWh/100 miles and "To" shows MPGe. Press Swap to reverse them.
- Read the result. The answer appears straight away, worked out as MPGe = 3,370.5 ÷ kWh per 100 miles.
- Check common values. Compare against the conversion table below if you want to sanity-check a figure.
Common questions
What does MPGe mean?
Miles per gallon of gasoline-equivalent: how far a vehicle travels on 33.705 kWh, the energy the US EPA assigns to one gallon of petrol.
How do I convert kWh/100 miles to MPGe?
Divide 3,370.5 by the kWh/100 miles figure. For example, 34 kWh/100 miles is about 99.1 MPGe, and 30 kWh/100 miles is 112.35 MPGe.
How do I convert MPGe to kWh/100 km?
Divide 2,094.3 by the MPGe figure. A car rated at 100 MPGe uses about 20.94 kWh per 100 km.
Can I compare MPGe directly with a petrol car's MPG?
As a measure of energy used per mile, yes, which is what the EPA intends. But MPGe says nothing about cost, because petrol and electricity are priced very differently. For running costs, multiply the kWh used by your own electricity price.
What do typical EV figures look like?
Efficient compact EVs are often in the mid-teens in kWh/100 km, while larger SUVs sit closer to 20. In MPGe terms, 15 kWh/100 km is about 140 MPGe and 20 kWh/100 km is about 105 MPGe.