MTMasterTool

EV Charging Cost Calculator

Estimate charging energy and cost between two charge levels.

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Currency: Amounts are calculated in the currency you select; this site does not convert between currencies and does not use live exchange rates.

What this tool does

Estimate charging energy and cost between two charge levels. Efficiency accounts for wall-to-battery losses; tariffs are user-entered.

How to use the EV Charging Cost Calculator

  1. Enter or select battery capacity (kwh).
  2. Enter or select starting charge (%).
  3. Enter or select target charge (%).
  4. Enter or select charging efficiency (%).
  5. Enter or select electricity price per kwh.
  6. Read the calculated result; change any measurement to compare alternatives.

Formula

wall kWh=battery×(target−start)/100/(efficiency/100); cost=wall kWh×rate
battery
Battery capacity (kWh)
start
Starting charge (%)
target
Target charge (%)
efficiency
Charging efficiency (%)
rate
Electricity price per kWh

Efficiency accounts for wall-to-battery losses; tariffs are user-entered.

Worked example

For ev charging cost calculator, the following measurements illustrate the exact method: Battery capacity (kWh): 75; Starting charge (%): 20; Target charge (%): 80; Charging efficiency (%): 90; Electricity price per kWh: 0.16.

Inputs

  • Battery capacity (kWh)75
  • Starting charge (%)20
  • Target charge (%)80
  • Charging efficiency (%)90
  • Electricity price per kWh0.16

Result

  • Charging cost$8.00
  • Wall energy (kWh)50

Results explained

Charging cost
Charging cost from the formula above. Efficiency accounts for wall-to-battery losses; tariffs are user-entered.
Wall energy (kWh)
Wall energy (kWh) from the formula above. Efficiency accounts for wall-to-battery losses; tariffs are user-entered.

Frequently asked questions

wall kWh=battery×(target−start)/100/(efficiency/100); cost=wall kWh×rate

Efficiency accounts for wall-to-battery losses; tariffs are user-entered.

No. Electrical and HVAC results are estimates. Installation must comply with local codes and be checked by a qualified licensed professional.

Nameplate values, conductor temperature, power factor, efficiency, weather and actual installation conditions may differ from your entered assumptions.

Confirm units, manufacturer data and the formula's assumptions, then verify sizing with the equipment instructions and applicable local standards.