What This Calculator Does
The VinFast Home Charger Electricity Cost Calculator estimates how much it costs to charge your VinFast electric vehicle at home each month and year. It converts the miles you drive into energy consumed and multiplies by your local electricity rate, giving a realistic picture of your home-charging budget. Rates and currency are shown in US dollars by default, but the math works with any consistent unit you enter.
How to Use It
Enter the number of miles you drive per year, your vehicle's efficiency in kilowatt-hours per mile (VinFast models such as the VF 8 typically use around 0.28–0.34 kWh/mile), and your residential electricity rate per kWh (the US average is roughly $0.16). The calculator returns your estimated monthly cost, annual cost, energy used, and cost per mile.
The Formula Explained
The core equation is:
$$\text{Monthly Cost} = \left(\frac{\text{Annual Miles}}{12}\right) \times \text{kWh per mile} \times \text{Rate per kWh}$$
Dividing annual miles by 12 gives average monthly miles. Multiplying by efficiency yields the kWh consumed, and multiplying by the rate converts energy into money. Annual cost is simply twelve times the monthly figure.
Worked Example
Suppose you drive 12,000 miles a year, your VinFast uses 0.30 kWh/mile, and you pay $0.16/kWh. Monthly miles = \(12{,}000 \div 12 = 1{,}000\). Energy = \(1{,}000 \times 0.30 = 300\) kWh. Monthly cost = \(300 \times \$0.16 = \textbf{\$48}\). Annual cost = \(\$48 \times 12 = \$576\), using 3,600 kWh per year, at $0.048 per mile.
FAQ
Where do I find my electricity rate? Check your utility bill — divide the total charge by total kWh used, or look for the per-kWh price listed.
What efficiency should I use? Look up your VinFast model's rated consumption or estimate from your trip computer. 0.28–0.34 kWh/mile is typical for VinFast SUVs.
Does this include charging losses? Home AC charging loses about 10–15% to heat. To account for it, raise your kWh/mile slightly or add 12% to the result.
