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EV calculator

EV Journey Cost Calculator

Estimate an EV journey's electricity use and charging cost.

Use this calculator

Enter journey and efficiency assumptions.

What your result means

This estimates electricity required and cost for the chosen one-way or return journey. Distance and miles per kWh determine energy; the entered tariff determines cost. Home and public charging can have very different prices, while cold weather, speed and driving conditions can change real efficiency.

Worked example

150 miles at 3.5 miles/kWh and 25p/kWh:

Energy
42.86 kWh
Cost
£10.71
Cost per mile
7.1p

Use this for one trip; annual charging cost is the better budgeting view.

Formula

kWh=milesmiles/kWh; cost=kWh×p/kWh100\text{kWh}=\frac{\text{miles}}{\text{miles/kWh}};\ \text{cost}=\text{kWh}\times\frac{\text{p/kWh}}{100}

Illustrative tariff sensitivity for the same 150-mile journey

PriceJourney cost
7p/kWh£3.00
15p/kWh£6.43
25p/kWh£10.71
40p/kWh£17.14
60p/kWh£25.71
75p/kWh£32.14

Using the result

Compare the same journey at the tariffs you actually expect to use. These example prices are not live tariff claims.

Assumptions and limitations

  • Real efficiency varies with speed, weather, heating and route conditions.
  • Charging availability and detours are not modelled.

Helpful questions

How does a return journey work?

The result changes directly with the values entered; real-world driving and charging conditions can differ.

Is this the same as EV cost per mile?

The result changes directly with the values entered; real-world driving and charging conditions can differ.

Does it include charging losses?

The result changes directly with the values entered; real-world driving and charging conditions can differ.

Why can public charging cost more?

The result changes directly with the values entered; real-world driving and charging conditions can differ.

Is this an annual charging estimate?

The result changes directly with the values entered; real-world driving and charging conditions can differ.

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