London ElectricalDISTRIBUTORS
Energy & cost / FORMULA-BASED TOOL

EV charging cost calculator

Calculate the energy charge for a session using grid-side kWh.

01Your inputs

Example values are prefilled. Replace them with your own.

kWh

Grid-side energy from the session receipt or meter, not battery capacity.

p/kWh

Example rate only. Enter your actual rate, including any applicable tax.

02The working, shownEV
EV

Every result has a reason.

Enter your values and calculate to see the result, formula and working here.

£ = grid kWh × p/kWh ÷ 100

Within this model

Use energy billed by the charger or measured at the supply, which includes charging losses. Battery capacity or energy stored in the battery is not equivalent. Excludes session, parking, idle and subscription fees.

UNDERSTAND THE CALCULATION

What the numbers mean.

The energy part of a charging bill is metered kilowatt-hours multiplied by the unit rate. Charging losses are already included in grid-side measurements. For a session spanning multiple tariffs, calculate each tariff period separately.

Formula reference: Virginia Tech · Estimating energy use ↗

A worked example

40 kWh billed at 25 p/kWh has an energy charge of £10.

Validation, precision and limitations

Keep the calculations connected.

Electricity cost ↗LED energy savings ↗