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EV vs Petrol Savings Calculator

Calculate how much you save by switching to an electric vehicle (EV) in Vietnam. Compare annual fuel costs, payback period, and 5-year net savings versus a petrol car.

Written by CalcVault Editorial Team
km/year
L/100km
₫/L
kWh/100km
₫/kWh
₫

Fill in the fields above and click Calculate to see your results.

How to use

To use the EV Savings Calculator, input your annual driving distance in kilometers to establish your baseline travel. Enter your current petrol car's fuel consumption (liters per 100km) and the local petrol price per liter. Then, input the electric vehicle's energy consumption (kWh per 100km) and your local electricity rate per kWh. You can also include the EV premium (extra cost of buying the EV over a gas car) to calculate the payback period. The calculator instantly displays your annual petrol cost, annual EV charging cost, and net annual savings. By seeing the 5-year net savings and payback years, you can make an informed financial decision on whether switching to an EV is worthwhile for your specific driving habits and local energy costs.

How it's calculated

Annual Petrol Cost

annual_km * petrol_consumption_per_100km / 100 * petrol_price_per_litre

Yearly fuel cost for the petrol vehicle

Annual EV Charging Cost

annual_km * ev_consumption_per_100km / 100 * electricity_price_per_kwh

Yearly electricity cost for the EV

Annual Savings

annual_km * petrol_consumption_per_100km / 100 * petrol_price_per_litre - annual_km * ev_consumption_per_100km / 100 * electricity_price_per_kwh

Annual fuel cost savings by driving an EV

Payback Period

ev_premium / (annual_km * petrol_consumption_per_100km / 100 * petrol_price_per_litre - annual_km * ev_consumption_per_100km / 100 * electricity_price_per_kwh)

Years to recoup the EV price premium through fuel savings

5-Year Net Savings

(annual_km * petrol_consumption_per_100km / 100 * petrol_price_per_litre - annual_km * ev_consumption_per_100km / 100 * electricity_price_per_kwh) * 5 - ev_premium

Net savings after 5 years, accounting for the EV price premium

Examples

15,000 km/yr: 7L/100km petrol vs 15kWh/100km EV, 50M premium

  • Annual Distance:15,000
  • EV Price Premium:50,000,000
  • Petrol Price:21,000
  • EV Energy Consumption:15
  • Electricity Price:2,000
  • Petrol Consumption:7

Result

  • Payback Period:4.8
  • Annual EV Charging Cost:6,000,000
  • Annual Savings:21,000,000
  • 5-Year Net Savings:5,000,000
  • Annual Petrol Cost:27,000,000

Driving 15,000 km annually with standard fuel prices leads to a petrol cost of 27M VND, whereas charging an EV costs only 6M VND. This yields 21M VND in annual savings, paying back a 100M VND EV premium in under 5 years.

10,000 km/yr: 7L/100km petrol vs 15kWh/100km EV, 50M premium

  • Annual Distance:10,000
  • EV Price Premium:50,000,000
  • Petrol Price:21,000
  • EV Energy Consumption:15
  • Electricity Price:2,000
  • Petrol Consumption:7

Result

  • Payback Period:2.9
  • Annual EV Charging Cost:10,000,000
  • Annual Savings:35,000,000
  • 5-Year Net Savings:75,000,000
  • Annual Petrol Cost:45,000,000

For heavy usage of 25,000 km, the petrol cost jumps to 45M VND against 10M VND for electricity. The 35M VND annual savings covers the EV premium in just 2.9 years, making it a highly profitable upgrade.

Industry Benchmarks

Metric Typical Range
Average urban drivers save around 15M - 25M VND annually switching to EVs. 20000000 ₫

Data source: Vietnam Auto Market Report 2024

Frequently Asked Questions

Is switching to an EV worth it in Vietnam?

For drivers covering 15,000+ km per year, switching to an EV like VinFast VF 5 or VF 8 can save 1–2 million VND annually on fuel alone. With a 50 million VND price premium, the payback period is typically 25–30 years at current electricity prices — making EVs more of an environmental choice than a financial one unless you drive very high mileage.

What is the electricity price for EV charging in Vietnam?

Vietnam's residential electricity price averages around 1,800–2,500 VND per kWh depending on consumption tier. Home charging overnight (off-peak) can be as low as 1,500 VND/kWh. Public fast chargers (VinFast V-GREEN network) charge around 3,858 VND/kWh. This calculator uses 2,000 VND/kWh as a blended average.

How does VinFast EV energy consumption compare to petrol cars?

VinFast VF 5 consumes approximately 13–15 kWh/100km, while VF 8 uses 18–22 kWh/100km. Compared to a petrol car at 7 L/100km (147,000 VND/100km at 21,000 VND/L), the VF 5 costs about 26,000–30,000 VND/100km — roughly 5x cheaper per kilometre for energy.

Does the calculator account for battery replacement costs?

No, this calculator focuses on routine operational costs like fuel vs. electricity. Battery replacement is typically a long-term expense covered by warranty for the first 8-10 years, which falls outside standard short-term payback calculations.
CalcVault Editorial Team

CalcVault Editorial Team

Verified Content Team

The CalcVault Editorial Team is a group of finance, health, and mathematics specialists dedicated to producing accurate, bilingual calculator content for Vietnamese and global small business owners. Every formula on CalcVault undergoes rigorous source verification against authoritative bodies including the IRS, CFPB, CDC, WHO, and NIST before publication. Our process includes independent peer review, structured fact-checking, and scheduled content audits to ensure every calculator remains up-to-date with the latest regulatory and scientific standards. We are committed to editorial independence from our advertising partners.

Areas of Expertise

Personal FinanceVietnam Tax & PayrollHealth Metrics & BMIApplied MathematicsBusiness LendingSMB Financial Planning
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