Compare the true cost of driving Electric vs. Gas with the CalcGami Electric vs Petrol Cost Calculator. Calculate fuel vs. charging costs, annual savings, and break-even periods to see if switching to an EV saves you money.
Savings Analysis
Break-even Period
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Monthly Running Cost
Petrol
EV
Net Monthly Saving
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If you choose EV
* Based on running costs only. Does not include maintenance (EVs usually cheaper) or battery replacement.
Saved Calculations
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Table of Contents
What is an Electric vs Petrol Cost Calculator?
An Electric vs Petrol Cost Calculator (or EV Savings Calculator) is a financial comparison tool designed to pit a traditional Internal Combustion Engine (ICE) vehicle against an Electric Vehicle (EV).
While EVs almost always cost less to “fuel” (electricity vs. gasoline), they typically have a higher upfront purchase price. Consumers need to know: “Will the savings on gas make up for the expensive car payment?” This calculator analyzes the Mileage, Electricity Rate (kWh cost), Gas Price, and Purchase Price to determine the total cost of ownership. It reveals the “Cost Per Mile” for both vehicles and projects the long-term savings. It includes History to compare different EV models, Save Calculation to track your research, and WhatsApp Share to show your family the potential savings.
Benefits of Using an Electric vs Petrol Cost Calculator
Buying an EV is a lifestyle change and a financial investment. This tool provides the data needed to switch confidently:
- Running Cost Reality: Electricity rates vary. This tool calculates exactly what it costs to charge an EV at your local rate compared to filling a gas tank.
- Break-Even Horizon: It calculates how many years it will take for the gas savings to pay off the higher price tag of the EV.
- Commute Analysis: For high-mileage drivers, the savings accumulate incredibly fast. This tool quantifies that benefit.
- Charging Efficiency: It accounts for the EV’s efficiency (Miles per kWh), which varies between models (e.g., a Tesla is more efficient than an electric truck).
- Environmental & Financial Synergy: It shows that going green often puts green back in your wallet.
Formula Used in Electric vs Petrol Cost Calculator
The calculator compares energy costs normalized to distance.
The Plain Text Formulas:
1. Calculate Petrol Cost Per Mile
- Cost = Gas Price / MPG
2. Calculate Electric Cost Per Mile
- Cost = Electricity Price (per kWh) / Miles per kWh
- (Note: Miles per kWh is the EV equivalent of MPG. Average is 3-4 miles/kWh).
3. Annual Running Cost
- Petrol Annual = Cost Per Mile x Annual Miles
- EV Annual = Cost Per Mile x Annual Miles
4. Annual Savings
- Savings = Petrol Annual – EV Annual
How to Use the Electric vs Petrol Cost Calculator
Follow these steps to analyze the switch:
- Enter Annual Mileage: Input your yearly driving distance.
- Enter Petrol Data: Input current Gas Price and Car MPG.
- Enter Electric Data: Input your Electricity Rate ($/kWh) and EV Efficiency (Miles/kWh).
- Tip: Find electricity rate on your utility bill (avg $0.15/kWh).
- Enter Car Prices (Optional): Input purchase price for Break-Even analysis.
- Calculate: Click the button to see the winner.
- Use Productivity Features:
- History: Compare a Tesla Model 3 vs. Toyota Camry.
- Save Calculation: Store as “EV Switch Plan.”
- Share on WhatsApp: Send the report: “We save $1,500/year with the EV!”
Real-Life Example
Scenario:
“Lisa” drives 12,000 miles a year.
- Current Car (Petrol): 25 MPG. Gas is $3.80/gallon.
- New Car (EV): Gets 3.5 miles/kWh. Home charging costs $0.14/kWh.
The Calculation:
Step 1: Petrol Cost
Gallons needed: 12,000 / 25 = 480.
Annual Cost: 480 x 3.80 = 1824
Cost Per Mile: $0.15.
Step 2: EV Cost
kWh needed: 12,000 / 3.5 = 3,428 kWh.
Annual Cost: 3,428 x 0.14 = 479.92
Cost Per Mile: $0.04.
Step 3: Savings
$1,824 – 480 = 1344 Saved per Year
The Result:
Switching to an EV saves Lisa $1,344 annually on fuel alone.
- Action: Lisa realizes that over 5 years, she saves over $6,700, making the EV a smart buy.
Frequently Asked Questions (FAQ)
1. How do I find my EV’s “MPG”?
EVs don’t use gallons. They use Miles per kWh (like 3.5 mi/kWh) or Wh/mile (Watt-hours per mile). The window sticker often lists MPGe (Miles Per Gallon Equivalent), but using “Miles per kWh” is more accurate for cost calculation.
2. Is public charging more expensive?
Yes, significantly. Charging at home might cost $0.15/kWh, but a public DC Fast Charger might cost $0.35 to $0.50/kWh. If you cannot charge at home, your savings will be lower. Adjust the “Electricity Rate” in the calculator to an average of home/public costs.
3. Does this include maintenance?
This calculator focuses on Fuel Energy costs. However, EVs typically have lower maintenance costs (no oil changes, no transmission fluid, less brake wear due to regenerative braking), which adds to the savings.
4. What about the cost of a home charger?
Installing a Level 2 home charger can cost 500−1500. You should subtract this one-time cost from your “First Year Savings” to get a true picture.
5. Do tax credits matter?
Yes. In many countries (like the US Federal Tax Credit of $7,500), tax incentives drastically lower the purchase price of an EV, improving the break-even point significantly. Manually deduct this from the EV purchase price when analyzing.
6. Does cold weather affect EV range/cost?
Yes. In freezing temperatures, EV efficiency can drop by 20-30% due to battery chemistry and heater usage. This increases your cost per mile slightly in winter months.