What is Petrol vs EV Cost Calculator?
Petrol vs EV Cost Calculator helps you compare petrol running costs with EV electricity costs and upfront premium.
The main result is annual EV energy saving, with a breakdown of petrol annual fuel cost, EV annual electricity cost and energy-only payback. The formula, example and assumptions below explain how to interpret it.
How to use Petrol vs EV Cost Calculator
Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.
- Gather annual distance (km), petrol mileage (km/litre), petrol price per litre (₹), EV energy from socket (kWh/100 km), electricity rate per kWh (₹) and extra upfront EV cost (₹). Use values from the same situation or reporting period.
- Replace the example annual distance with your own value, then complete the other fields. Check the displayed units.
- Select Calculate and read annual EV energy saving with its result breakdown. Change one input and calculate again to compare a second scenario. Reset restores the original example.
- Enter annual distance in km, at least 0. Decimals are accepted.
- Enter petrol mileage in km/litre, at least 0.001. Decimals are accepted.
- Enter petrol price per litre in ₹, at least 0. Decimals are accepted.
- Enter EV energy from socket in kWh/100 km, at least 0. Decimals are accepted.
- Enter electricity rate per kWh in ₹, at least 0. Decimals are accepted.
- Enter extra upfront EV cost in ₹, at least 0. Decimals are accepted.
Petrol vs EV Cost Calculator: a worked example
With the inputs below, the result is ₹79,600 (annual EV energy saving). Follow the example, then replace these illustrative values with your own.
| Input or output | Example value |
|---|---|
| Annual distance (km) | 15,000 km |
| Petrol mileage (km/litre) | 15 km/litre |
| Petrol price per litre (₹) | ₹100 |
| EV energy from socket (kWh/100 km) | 17 kWh/100 km |
| Electricity rate per kWh (₹) | ₹8 |
| Extra upfront EV cost (₹) | ₹3,00,000 |
| Annual EV energy saving | ₹79,600 |
| Petrol annual fuel cost | ₹1,00,000 |
| EV annual electricity cost | ₹20,400 |
| Energy-only payback | 3.768844 years |
Understanding the Petrol vs EV Cost result
Read annual EV energy saving alongside petrol annual fuel cost, EV annual electricity cost and energy-only payback. These describe different parts of the same calculation.
Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.
- Example Petrol annual fuel cost: ₹1,00,000
- Example EV annual electricity cost: ₹20,400
- Example Energy-only payback: 3.768844 years
Petrol vs EV Cost Calculator: assumptions and common mistakes
A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.
- Use mileage from comparable driving conditions. A fuel-only comparison excludes financing, maintenance and resale unless those amounts are specifically entered.
For wider guidance, visit Bureau of Energy Efficiency. The formula and scope of this specific tool are stated on this page.
