EV Charging Cost Calculator

EV Charging Cost is evaluated from Battery Capacity, Charge From and Charge To. The calculation reports kWh Needed to Charge, Total Charging Cost and Cost per Mile.

Results

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About the EV Charging Cost Calculator

EV Charging Cost is treated here as a quantitative relation between Battery Capacity, Charge From, Charge To and Home Electricity Rate and kWh Needed to Charge, Total Charging Cost, Cost per Mile and Range Added.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
Multiply battery size by the fraction to be charged, then by electricity rate. MPGe comparison: EPA uses 33.7 kWh = 1 gallon energy equivalent. Divide EV cost by gas cost to find savings per trip.

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

Multiply battery size by the fraction to be charged, then by electricity rate. MPGe comparison: EPA uses 33.7 kWh = 1 gallon energy equivalent. Divide EV cost by gas cost to find savings per trip.

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Tesla Model Y: 75 kWh, 20% to 80%, $0.16/kWh home rate

Inputs

battery_kwh: 75 charge_from_pct: 20 charge_to_pct: 80 electricity_rate: 0.16 efficiency_mi_kwh: 3.8 gas_price: 3.5
kWh Needed to Charge: 45 kWh. Total Charging Cost: $7.2. Cost per Mile: $0.042/mi. Range Added: 171 mi. Equivalent Gas Cost: $4.67. Savings vs Gasoline: $2.53

With Battery Capacity = 75, Charge From = 20, Charge To = 80 and Home Electricity Rate = 0.16 as the stated inputs, the result is kWh Needed to Charge = 45 kWh, Total Charging Cost = $7.2 and Cost per Mile = $0.042/mi. Each value corresponds to the declared output fields.

Example 2: Chevy Bolt: 65 kWh, 15% to 90%, California $0.28/kWh

Inputs

battery_kwh: 65 charge_from_pct: 15 charge_to_pct: 90 electricity_rate: 0.28 efficiency_mi_kwh: 3.5 gas_price: 4.8
kWh Needed to Charge: 48.75 kWh. Total Charging Cost: $13.65. Cost per Mile: $0.08/mi. Range Added: 171 mi. Equivalent Gas Cost: $6.96. Savings vs Gasoline: $6.69

With Battery Capacity = 65, Charge From = 15, Charge To = 90 and Home Electricity Rate = 0.28 as the stated inputs, the result is kWh Needed to Charge = 48.75 kWh, Total Charging Cost = $13.65 and Cost per Mile = $0.08/mi. Each value corresponds to the declared output fields.

Example 3: Road trip stop: DC Fast Charge, 10% to 80%, commercial rate $0.44/kWh

Inputs

battery_kwh: 82 charge_from_pct: 10 charge_to_pct: 80 electricity_rate: 0.44 efficiency_mi_kwh: 4 gas_price: 3.5
kWh Needed to Charge: 57.4 kWh. Total Charging Cost: $25.26. Cost per Mile: $0.11/mi. Range Added: 230 mi. Equivalent Gas Cost: $5.97. Savings vs Gasoline: $19.28

With Battery Capacity = 82, Charge From = 10, Charge To = 80 and Home Electricity Rate = 0.44 as the stated inputs, the result is kWh Needed to Charge = 57.4 kWh, Total Charging Cost = $25.26 and Cost per Mile = $0.11/mi. Each value corresponds to the declared output fields.

Example 4: Fleet van: 150 kWh, 0% to 100%, depot charging $0.09/kWh overnight

Inputs

battery_kwh: 150 charge_from_pct: 0 charge_to_pct: 100 electricity_rate: 0.09 efficiency_mi_kwh: 2.2 gas_price: 3.5
kWh Needed to Charge: 150 kWh. Total Charging Cost: $13.5. Cost per Mile: $0.041/mi. Range Added: 330 mi. Equivalent Gas Cost: $15.58. Savings vs Gasoline: $2.08

With Battery Capacity = 150, Charge From = 0, Charge To = 100 and Home Electricity Rate = 0.09 as the stated inputs, the result is kWh Needed to Charge = 150 kWh, Total Charging Cost = $13.5 and Cost per Mile = $0.041/mi. Each value corresponds to the declared output fields.

Common Use Cases

  • Calculate how much it costs to charge your EV at home
  • Compare EV charging cost per mile vs gasoline cost per mile
  • Estimate monthly EV charging expense