Calculator Inputs
The page keeps a single-column flow. The form uses three columns on large screens, two on medium screens, and one on mobile.
Example Data Table
These examples are illustrative and help explain how different charging mixes can change annual electricity cost.
| Scenario | Annual Distance | Efficiency | Charging Mix | Grid Energy | Annual Cost |
|---|---|---|---|---|---|
| Urban home-heavy driver | 12,000 km | 15.8 kWh / 100 km | 85% home, 5% work, 10% public | 2,120 kWh | $372.40 |
| Mixed commuter | 18,000 km | 17.8 kWh / 100 km | 70% home, 10% work, 20% public | 3,776 kWh | $795.14 |
| Public-heavy traveler | 24,000 km | 19.4 kWh / 100 km | 40% home, 0% work, 60% public | 5,700 kWh | $1,678.30 |
Formula Used
Adjusted Efficiency = Base Efficiency × (1 + Seasonal Penalty ÷ 100)
Wheel Energy (kWh) = Annual Distance × Adjusted Efficiency ÷ 100
Grid Energy (kWh) = Wheel Energy ÷ (1 - Charging Loss ÷ 100)
Home Effective Rate = (Off-Peak Rate × Off-Peak Share) + (Peak Rate × Peak Share)
Public Effective Rate = (DC Rate × DC Share) + (AC Rate × AC Share)
Location Cost = Location Energy × Location Rate
Total Annual Cost = Home Cost + Work Cost + Public Cost + Annual Fees
How to Use This Calculator
- Choose kilometers or miles to match your driving records.
- Enter your yearly travel distance and your EV energy use.
- Add battery size and usable battery percentage for range estimates.
- Enter charging losses and any seasonal efficiency penalty.
- Set home, work, and public charging shares. They can total any value because the calculator normalizes them.
- Enter the relevant electricity or charging rates for each location.
- Add monthly subscriptions and annual charging-related fees.
- Press the calculate button to display the results above the form.
- Use the CSV and PDF buttons to export your calculated summary.
Frequently Asked Questions
1) What does this calculator estimate?
It estimates yearly and monthly EV electricity cost using distance, efficiency, charging losses, charging mix, electricity rates, and subscription-style charging fees.
2) Why are charging losses included?
Your car does not receive every unit purchased from the grid. Some energy is lost as heat in cables, onboard charging, and battery conditioning.
3) What is seasonal efficiency penalty?
It models extra energy use from weather, cabin heating, cooling, wet roads, and reduced battery efficiency. Higher percentages increase annual electricity consumption.
4) Why separate home, work, and public charging?
Each location often has a different electricity price. Separating them creates a more realistic blended charging rate and a better ownership-cost estimate.
5) What is the effective home charging rate?
It is the weighted average of peak and off-peak home prices. The calculator combines them using your off-peak charging percentage.
6) What does range per full charge mean here?
It estimates practical distance from the usable battery and adjusted efficiency. It is a planning value, not a guaranteed real-world range.
7) Can I use it for miles instead of kilometers?
Yes. Select miles as the distance unit. Then enter energy use as kWh per 100 miles so the calculation stays consistent.
8) When should I export the results?
Export after reviewing the calculated summary. CSV is useful for spreadsheets, while PDF is better for sharing a fixed report or record.