Per fill-up, the petrol car usually wins: a typical fuel tank holds more miles than a typical full charge. The worked examples below put numbers on it — a 12-gallon tank at 30 mpg covers about 360 miles, while a 60 kWh usable battery at 3.5 miles per kWh covers about 210 miles. But the comparison flatters petrol, because EV drivers rarely run full to empty — the car refills at home each night, so its fill is a night’s parking, not a special trip.
Key Takeaways
- Per fill, a petrol tank usually holds more miles than a full charge — about 360 vs about 210 in the worked examples.
- The EV wins per mile on efficiency; the tank wins on stored energy. Both are true at once.
- With home charging, miles added per hour parked matters more than miles per fill.
The Per-Fill Maths, Side by Side
Both figures are the same sum: stored energy multiplied by how far the car travels on each unit. For petrol it is tank size times miles per gallon; for an EV it is usable battery capacity times miles per kWh. The examples use round numbers so you can swap in your own — your car’s real consumption is on its trip display, and official ratings are published at FuelEconomy.gov.
| Petrol example | Electric example | |
|---|---|---|
| Store of energy | 12 gallons in the tank | 60 kWh usable battery |
| Efficiency | 30 miles per gallon | 3.5 miles per kWh |
| Miles per fill | About 360 miles | About 210 miles |
Both results move with the car and the day. A bigger tank or battery stretches them; cold weather, high speed and heavy loads shrink them. Treat the table as the shape of the answer, not a promise for any model.
Why the Electric Number Is Smaller
A battery simply stores less energy than a tank of fuel. The EV claws much of the gap back with efficiency:
an electric drivetrain turns most of its stored energy into motion, while a petrol engine loses most of its fuel as heat. That is why the electric example needs only 60 units of energy to cover 210 miles while the petrol car burns 12 gallons to cover 360. Per mile, the EV is the thrifty one; per fill, the tank is the bigger store. Which matters depends on how you refuel.
Why Per-Fill Miles Matter Less Than They Look
Petrol driving is a cycle of draining and refilling: run the tank down, detour to a station, fill up. Home charging breaks that cycle. Typical figures from the U.S. Department of Transportation put Level 1 charging at 2–5 miles of range added per hour and Level 2 at 10–20 miles per hour, so a car parked overnight replaces a normal day’s driving while its owner sleeps. For that routine, the number that decides your day is not miles per charge but miles added per hour parked — in practice, the difference between the charging levels. Our guide to what a 7 kW portable charger adds works the same sum.
When the Tank Really Does Win
For some drivers, per-fill miles are the honest measure:
- No home charging. If every refill is a public session, you live by miles per charge and fast-charge speed, much as a petrol driver lives by theirs.
- Long rural legs. Where chargers are far apart, the full-charge figure decides whether a route works at all.
- Towing and heavy loads. Consumption climbs steeply, and the per-charge figure shrinks when a detour hurts most.
For those cases, shop by usable battery size and the car’s real consumption, and treat fast-charge speed as the second half of the same question.
Refilling at Home, Night After Night
Two EVDANCE chargers built for the overnight routine: the EV-ACS4005T 40A NACS portable charger delivers 9.6 kW from a NEMA 14-50 outlet with adjustable current, and the EV-ACT5006T 48A wall charger offers up to 48 A, hard-wired or plug-in, with a 25 ft cable. Either turns parked hours into tomorrow’s miles.
Frequently Asked Questions
So which goes further — one charge or one tank?
Per fill, usually the tank, as the worked examples show. Across a normal week, though, the home-charged EV starts every morning full, so its driver rarely runs into a range limit at all.
How do I work out my own car’s miles per charge?
Multiply the battery’s usable capacity in kWh by your real miles-per-kWh from the trip display; official ratings are at FuelEconomy.gov.
Does a bigger battery close the gap?
It narrows it: more stored kWh means more miles per charge. But a bigger battery also takes longer to refill, which is why miles added per hour — the charging rate — matters as much as the size of the store.
Related Reading
- Level 1 vs Level 2 vs DC Fast Charging: A Practical Comparison
- What Is a 7kW Portable EV Charger? Speed, Range, and Compatibility Explained
- How Fast Is a DC Fast Charger?
- Does an EV Battery Drain When Parked?
