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EV Home Charging Cost Calculator

Estimate daily and annual costs to charge your electric vehicle at home based on electricity rates and driving habits.

Vehicle Specs

Charging Setup

Electricity Rates

Usage Patterns

40 miles

EV home charging cost formula and worked example

Formula

daily cost = (daily miles ÷ mi/kWh ÷ charger efficiency × $/kWh) × 1.1

where charger efficiency is the wall-to-battery ratio as a decimal (0.90 = 90%), and the real-world buffer accounts for battery conditioning and cable losses

Worked example

A driver covers 40 miles a day in an EV rated at 3.5 mi/kWh, charging on a Level 2 charger that is 90% efficient, paying a flat $0.15/kWh.

  1. Energy delivered to the battery: 40 miles ÷ 3.5 mi/kWh = 11.43 kWh
  2. Energy drawn from the wall: 11.43 kWh ÷ 0.90 charger efficiency = 12.70 kWh
  3. Daily cost: 12.70 kWh × $0.15/kWh × 1.1 real-world buffer = $2.10
  4. Annual cost: $2.10 × 365 days = $764.76

Result

Charging 40 miles per day at $0.15/kWh with a 90%-efficient charger costs about $2.10 per day, or $764.76 per year.

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