EV and Fuel Trip Cost Splitter Calculator (Cost Per Passenger)
Trip cost has two components that behave very differently. Energy scales linearly with distance and inversely with efficiency, while tolls and parking are fixed regardless of how far you drive. Splitting between passengers turns a marginal-cost question into a fairness question, which is why the per-person figure matters more than the total.
Charging an EV at home is usually three to four times cheaper per mile than rapid charging on a motorway.
| Vehicle | Efficiency | Energy used | Energy cost | Per person |
|---|---|---|---|---|
| Efficient petrol | 45 MPG | 7.11 gal | $25.96 | $12.49 |
| Average petrol | 30 MPG | 10.67 gal | $38.93 | $15.73 |
| Large SUV | 20 MPG | 16.00 gal | $58.40 | $20.60 |
| EV home charge | 3.5 mi/kWh | 91.4 kWh | $13.71 | $9.43 |
| EV rapid charge | 3.5 mi/kWh | 91.4 kWh | $50.29 | $18.57 |
EV charging costs are not one number
Home overnight charging on an off-peak tariff can cost eight to fifteen cents per kilowatt-hour. Public rapid chargers routinely charge fifty to seventy cents — more than four times as much. For an EV averaging 3.5 miles per kilowatt-hour, that is the difference between four cents and sixteen cents per mile.
Efficiency degrades on the motorway
Aerodynamic drag rises with the square of speed, so both combustion and electric vehicles lose efficiency above roughly sixty miles per hour. EVs are hit harder in relative terms because they have no waste heat to recover and cabin heating draws directly from the traction battery in cold weather, cutting winter range by up to thirty percent.
Splitting fairly with a car owner
Fuel and tolls are the obvious shared costs. Many groups also add a per-mile allowance — commonly around ten to fifteen cents — to cover tyres, servicing and depreciation, which are real costs the driver absorbs alone. Agree this before departure rather than at the destination.
Cost per mile by powertrain
| Vehicle | Efficiency | Energy price | Cost per mile | Cost per 1,000 miles |
|---|---|---|---|---|
| Compact petrol | 40 MPG | $3.65/gal | $0.091 | $91 |
| Mid-size petrol | 28 MPG | $3.65/gal | $0.130 | $130 |
| Large SUV petrol | 18 MPG | $3.65/gal | $0.203 | $203 |
| Diesel estate | 45 MPG | $3.95/gal | $0.088 | $88 |
| EV — home charge | 3.5 mi/kWh | $0.15/kWh | $0.043 | $43 |
| EV — public rapid | 3.5 mi/kWh | $0.55/kWh | $0.157 | $157 |
| Hybrid | 52 MPG | $3.65/gal | $0.070 | $70 |
People also ask
Is an EV cheaper to run than petrol?
On home charging, substantially — typically four to five cents per mile against twelve to fourteen for petrol. On public rapid chargers the advantage largely disappears.
How should road trip fuel costs be split?
Divide fuel plus tolls by the number of people including the driver. Many groups add a small per-mile wear allowance for the car owner.
Why does my EV range drop in winter?
Cabin heating draws directly from the traction battery and cold cells have higher internal resistance. Combined, these commonly reduce range by twenty to thirty percent.
Three worked examples
Same engine, three different starting points — useful if you want to see how sensitive the answer is before you type your own numbers in.
Example 1: trip distance 249.6 miles / km, currency "USD $"
On the lower / more conservative end. Charging an EV at home is usually three to four times cheaper per mile than rapid charging on a motorway.
Example 2: trip distance 320 miles / km, currency "USD $"
A typical middle-of-the-road setup. Charging an EV at home is usually three to four times cheaper per mile than rapid charging on a motorway.
Example 3: trip distance 416 miles / km, currency "GBP £"
On the higher / more demanding end. Charging an EV at home is usually three to four times cheaper per mile than rapid charging on a motorway.
Quick answers about the EV & Fuel Trip Splitter
What exactly does the EV & Fuel Trip Splitter work out?
Trip cost has two components that behave very differently. You enter currency, trip distance, vehicle type and efficiency (MPG, or mi/kWh for EV) (plus 4 more optional details) and the result panel updates straight away, so you can compare two or three versions of the same question in a few seconds.
What do I need before I start?
Only 8 fields: currency, trip distance, vehicle type, efficiency (MPG, or mi/kWh for EV), fuel price per gallon / kWh price, tolls and parking, people sharing the cost and return journey. Nothing else is needed and nothing is stored.
How is it calculated — eV charging costs are not one number?
Home overnight charging on an off-peak tariff can cost eight to fifteen cents per kilowatt-hour. The same maths runs inside this page, so hand-checking the result on paper gives you the identical figure.
Why do two calculators give me different answers for eV & Fuel Trip Splitter?
Aerodynamic drag rises with the square of speed, so both combustion and electric vehicles lose efficiency above roughly sixty miles per hour. Different sites pick different assumptions, so always check which method a calculator states before you trust the gap between two numbers.
What does the "Cost per mile by powertrain" table on this page tell me?
It is the reference range this tool works against — 7 rows from "Compact petrol" (40 MPG) up to "Hybrid" (52 MPG). Use it to sanity-check whether the number you just calculated sits where you expected it to.
Which currency should I pick?
The dropdown offers 4 choices — USD $, GBP £, EUR € and AUD A$. Pick the one that matches your real situation rather than the one you would like to be true; currency usually moves the final figure more than any other single input, so it is worth running it twice with the option above and below your guess.
Does it work in both metric and imperial (or another currency)?
Yes. The "Currency" control converts every field and every result, so you never have to convert anything by hand before typing it in. Switch it after entering your numbers and the output re-renders instantly in the new system.
Do I have to press a button or reload the page to see the result?
No. EV & Fuel Trip Splitter runs completely inside your browser, so the moment you change a value the cards recalculate — there is no submit step, no page reload and no waiting for a server round trip. That also means it keeps working on a weak or intermittent mobile connection.
Is it free, and do you keep what I type?
It is free with no sign-up, no app install and no usage limit. Nothing you enter into EV & Fuel Trip Splitter leaves your device — the calculation is JavaScript running locally, so there is no upload of your figures to DrHint or anyone else.
Can I use it on a phone?
Yes — the layout stacks to a single column on small screens and the number fields open the numeric keypad on both Android and iOS. Many people bookmark this page or add it to their home screen and re-open it whenever the question comes up.
Anything to be careful about with the result?
On home charging, substantially — typically four to five cents per mile against twelve to fourteen for petrol. Treat the output as a well-grounded estimate for planning, not as a professional, legal or medical decision on its own.
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