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How to use this calculator

1. Enter the battery capacity and the start and target charge.
2. Enter your peak price per kWh, the off-peak price, and the share you charge off-peak.
3. Click Calculate cost for the energy, the cost and the off-peak saving.

How the cost is calculated

The energy added is the usable battery share; you pay for slightly more because of charging losses; the price blends peak and off-peak:

The blended price weights the off-peak and peak rates by how much you charge in each. Shifting more charging to off-peak lowers the blended price and the bill.

Why off-peak charging pays

Many tariffs (and Nordic spot pricing) are much cheaper at night. Because an EV adds a large, flexible load, scheduling it to off-peak hours is one of the biggest single savings a household can make. The calculator shows the saving versus charging entirely at the peak rate.

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How much does it cost to charge an electric car?

Multiply the energy you add (battery × charge added ÷ 100, plus ~10% for losses) by your price per kWh. Charging a 60 kWh car from 20% to 80% is about 40 kWh from the grid.

How much can off-peak charging save?

It depends on the rate gap, but off-peak is often half the peak price or less. Charging mostly off-peak can cut EV running costs substantially versus charging at peak times.

What currency does this use?

Whatever currency you enter the prices in — the result is in the same currency. The calculation only uses the numbers you provide.