EV vs Petrol Calculator Texas: What the Maths Says With Real Assumptions
There is no single number that answers ev vs petrol calculator texas, because the answer moves with four inputs: the price of petrol, the petrol car's MPG, the price of electricity and the EV's miles per kWh. Change any one and the result changes, sometimes by enough to flip the conclusion. That is why this page shows its working instead of handing you a verdict: the formula, a worked example with stated assumptions, and tables at different mileages.
The short answer is that the comparison comes down to cost per mile: the petrol car burns US gallons, so its cost per mile is the price per gallon divided by its MPG, while the EV uses kilowatt-hours, so its cost per mile is the electricity price per kWh divided by its miles per kWh. With the example assumptions on this page — petrol at $3.45 per US gallon, 36 US MPG, electricity at 25 cents per kWh and 4.0 miles per kWh — the petrol car costs about $0.10 per mile and the EV about $0.06 per mile. Those are example figures, not prices you should quote, and the rest of this page shows how they were reached and what would change them.
Assumptions used on this page for ev vs petrol calculator texas
Taking ev vs petrol calculator texas as the case in point: Every figure in the tables below comes from this assumptions table. Each one is an assumption or an example, not a measured fact about any particular car or a current price. Substitute your own numbers and the method still works.
| Input | Value used | Status |
|---|---|---|
| Petrol price | $3.45 per US gallon | Example price |
| Petrol efficiency | 36 US MPG | Assumption |
| Electricity price | 25 cents per kWh | Example price |
| EV efficiency | 4.0 miles per kWh | Assumption |
| Annual mileage | 12,000 miles | Example |
Because this page is about texas, the units above match how drivers there usually measure fuel and electricity. The method itself does not change with location — only the units and the example prices do — so a driver anywhere else can use the same steps with local figures. Do not treat the example prices as current prices for Texas: they are placeholders chosen to make the arithmetic easy to follow, and real prices move constantly.
How the EV versus petrol comparison works for ev vs petrol calculator texas
For ev vs petrol calculator texas, the point is this: Hold the mileage constant and price the energy each car actually uses. For the petrol car, cost per mile equals the price per gallon divided by its MPG. For the EV, cost per mile equals the price per kWh divided by its miles per kWh. Multiply each cost per mile by the annual mileage and you have the annual fuel and charging bill for each car; subtract one from the other and you have the saving, or the extra cost, under those assumptions. The method is deliberately simple, because a simple method with honest inputs beats a complicated model built on guessed ones. The two numbers that matter most are the electricity price and the petrol car's MPG: a driver who charges at home on a cheap overnight rate will see a very different answer from a driver who relies on public rapid chargers, and a thirsty petrol car widens the gap while an efficient one narrows it.
ev vs petrol calculator texas: Worked example: the same distance, two energy bills
Take a driver covering 12,000 miles a year. The petrol car does 36 MPG and petrol costs $3.45 per gallon as an example price, so its cost per mile is $3.45 ÷ 36 = $0.10, and 12,000 miles cost $1,150.00 a year. The EV does 4.0 miles per kWh and electricity costs 25 cents per kWh as an example price, so its cost per mile is $0.25 ÷ 4.0 = $0.06, and 12,000 miles cost $750.00 a year. The difference on fuel and charging alone is $400.00 a year in the EV’s favour under these assumptions. Now change one input and watch the answer move: if the EV is charged mostly at a public rapid charger at, say, double the home electricity price used here, its annual charging cost doubles and most of the saving disappears. If the petrol car is driven mainly in town at lower MPG, the petrol bill rises and the saving grows. That sensitivity is the real lesson — the answer is only as solid as the assumptions, so write yours down before you believe the result.
ev vs petrol calculator texas: Cost at different annual mileages
The table uses the worked-example assumptions above — petrol at $3.45 per gallon (example), 36 MPG, electricity at 25 cents per kWh (example), 4.0 miles per kWh. The gap grows with mileage, which is why high-mileage drivers see the biggest fuel-cost difference and low-mileage drivers see the smallest.
| Annual miles | Petrol cost per year | EV charging cost per year | Difference |
|---|---|---|---|
| 6,000 | $575.00 | $375.00 | $200.00 |
| 8,000 | $766.67 | $500.00 | $266.67 |
| 10,000 | $958.33 | $625.00 | $333.33 |
| 12,000 | $1,150.00 | $750.00 | $400.00 |
| 15,000 | $1,437.50 | $937.50 | $500.00 |
| 20,000 | $1,916.67 | $1,250.00 | $666.67 |
Cost per mile and per 100 miles for ev vs petrol calculator texas
At the example assumptions, the petrol car costs $0.10 per mile ($9.58 per 100 miles) and the EV costs $0.06 per mile ($6.25 per 100 miles). Per 100 miles is often the easier figure to compare with a fuel receipt or a charging bill, because both are usually priced in round numbers per hundred miles of driving. If you know your own MPG and your own prices, the same two divisions give your own figures: fuel price per gallon divided by MPG, and electricity price per kWh divided by miles per kWh.
ev vs petrol calculator texas: What the comparison leaves out — and why it matters
For ev vs petrol calculator texas, the point is this: Treat the saving on this page as a fuel-and-charging figure, not a total-cost verdict. It leaves out the price difference between the cars, depreciation, insurance, servicing, tyres and tax, and it assumes one electricity price when real charging is a blend of cheap home charging and expensive public rapid charging. A driver who charges at home will do better than these figures; a driver who lives on rapid chargers may do worse. Add the excluded items with stated assumptions if you want the full comparison.
Common mistakes for ev vs petrol calculator texas
- For ev vs petrol calculator texas, the point is this: Comparing a laboratory test figure against a real-world figure tells you nothing about the car and everything about the methods. Keep the method constant — real-world against real-world — and the comparisons become meaningful.
- Taking ev vs petrol calculator texas as the case in point: Forgetting charging losses is another: slightly more electricity is drawn from the plug than the battery stores, so dividing the battery size by the miles driven understates the real cost per mile by a few percent.
- Mixing US and imperial gallons is the biggest, because it shifts the answer by about 20 percent with no warning. A UK imperial gallon is about 4.55 litres; a US gallon is about 3.79 litres, so the same car has a higher MPG figure in imperial gallons than in US gallons. That is the point this page works through for ev vs petrol calculator texas.
- Taking ev vs petrol calculator texas as the case in point: Using one tank or one charge instead of an average is next — a single fill is noisy, and a pump that clicks off early can add a phantom gallon, while a single charge says nothing about your usual mix of home and public charging.
ev vs petrol calculator texas: Related calculations
For ev vs petrol calculator texas, the point is this: If this page answered your question, these pages take the next step — the same method applied to a closely related question, or the calculator that does the arithmetic for you.
- EV Payback Calculator
- How Much Does an EV Cost per Mile
- EV vs Petrol Which Is Better for Me
- EV vs Gas Cost Calculator
- Use the calculator
- Browse all ev vs petrol pages
Putting your figure to work for ev vs petrol calculator texas
On this page, ev vs petrol calculator texas is the case in point: Putting the figure to work is where the method pays off. Once you know your own cost per mile for each car, measured with your own prices and efficiencies, you can price any journey before you set off and compare cars honestly, because you are comparing measured figures rather than brochure claims. Keep a simple log — date, miles, energy used, price paid — and review it monthly. Patterns show up quickly: a winter dip in EV efficiency, a motorway improvement, a slow rise in your charging cost that points to more public charging than you planned. The log turns a vague feeling about fuel use into a number you can act on, and that is the whole point of measuring in the first place.
Frequently asked questions
Can I use the same method for a diesel car?
Yes. A diesel car uses the same petrol-side formula — fuel price per gallon divided by MPG — with diesel prices and diesel MPG. The EV side is unchanged. Compare the two cost-per-mile figures the same way, and remember the same exclusions apply. That is the point this page works through for ev vs petrol calculator texas.
What affects an EV's miles per kWh?
Taking ev vs petrol calculator texas as the case in point: Driving speed, temperature, heating and air conditioning, tyre pressures and how much town versus motorway driving you do. Cold weather and high speeds reduce miles per kWh, while gentle town driving usually improves it. Measure yours over several weeks rather than trusting a single trip.
How do I work out my own EV versus petrol saving?
On this page, ev vs petrol calculator texas is the case in point: Use the same mileage for both cars. For the petrol car, divide the fuel price per gallon by its MPG to get cost per mile. For the EV, divide the electricity price per kWh by its miles per kWh. Multiply each by your annual miles and subtract. Use your own prices — especially your real charging mix of home and public charging — rather than the example prices on this page.
How many kWh does it take to charge an EV?
Taking ev vs petrol calculator texas as the case in point: It depends on the battery size and how empty it is. A charge from near-empty to full takes roughly the battery's capacity in kWh, plus a few percent for charging losses. Divide the kWh drawn by the miles driven afterwards and you have the car's real miles per kWh for that period.
Does an EV cost more to insure?
Insurance is not part of the fuel-and-charging maths on this page, and it can differ between an EV and a petrol car for reasons that have nothing to do with energy: repair costs, parts availability and the car's value all play a part. Get a quote for both cars before comparing total costs. That is the point this page works through for ev vs petrol calculator texas.