EV vs Petrol Car Cost Calculator 2026: Calculate Break-Even & Fuel Savings
Running Cost & Payback Comparison
5-Year Ownership & Fuel Savings Breakdown
| TIMELINE | KM DRIVEN | PETROL COST | EV POWER COST | NET FUEL SAVINGS |
|---|
How to Calculate EV vs Petrol Break-Even Distance
While Electric Vehicles (EVs) carry a higher upfront purchase price tag compared to petrol or diesel cars, their per-kilometer running cost is significantly lower. Calculating the break-even mileage helps you determine exactly when the cumulative fuel savings offset the initial price premium.
EV Cost Per KM = (Battery Capacity kWh / Real Range km) x Electricity Tariff Rate
Break-Even Kilometers = EV Price Premium / (Petrol Cost Per KM - EV Cost Per KM)
4 Factors That Determine Real-World EV Fuel Savings
- Daily Commute Distance: High daily mileage (40 km+ per day) dramatically shortens the EV price break-even timeline, making electric cars highly profitable for daily highway or city commuters.
- Home Charging vs Commercial DC Fast Charging: Charging your EV overnight using domestic solar or home AC power costs ₹0.80 to ₹1.20 per km, whereas public DC fast chargers cost ₹2.50 to ₹3.50 per km.
- Maintenance Cost Advantage: EVs contain ~20 moving parts compared to 2,000+ internal combustion engine (ICE) components. This reduces annual maintenance expenses by 60% (no engine oil changes, spark plugs, or clutch plates).
- Battery Warranty Protection: Modern EV manufacturers offer 8-year or 1,60,000 km battery warranties, guaranteeing battery health throughout the payback window.
Frequently Asked Questions (FAQs)
Is buying an EV profitable if I drive less than 20 km per day?
If your daily commute is under 20 km (less than 7,000 km annually), it may take 7 to 9 years to break even on a ₹3.5 Lakh EV price premium. For low mileage, a petrol or hybrid car may offer better upfront value.
How many units of electricity does an EV consume for a full charge?
Compact electric cars (e.g. Tata Tiago EV or Punch EV) typically feature 24 kWh to 30 kWh battery packs, requiring 24 to 30 units of electricity for a 0% to 100% full charge.
How much does EV battery replacement cost after 8 years?
Lithium-ion battery prices drop by 8% to 10% annually due to scale. By the time an 8-year warranty expires, replacement battery packs are projected to cost 50% less than today's rates, easily covered by your 8-year fuel savings.
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