Car / 02
EV Charging Time and Cost Calculator
Find how long an electric car takes to charge and what it costs, from the battery size, the charge you start and finish at, the charger, and your price per kWh, from a household socket to an ultra-rapid charger.
EV Charging Time and Cost Calculator: The energy added is the battery's capacity times the percentage you add. Charging loses some energy as heat, so more is drawn from the supply than reaches the battery, about 10 to 15% on AC charging and less on DC; the cost uses the energy drawn. The time is that energy divided by the charger's power, with the slower charging of DC rapid chargers above 80% allowed for. Runs 100% locally in your browser with zero server file uploads.
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5 h 33 min
Add a price to see the costCharging time also depends on the car: an AC charge cannot go faster than the car's on-board charger (often 7 to 11 kW), and fast DC charging slows down as the battery fills, especially above 80%, which this estimate allows for roughly. Cold batteries charge more slowly.
Charging levels
A household socket adds around 7 to 15 km (5 to 10 miles) of range per hour, fine for topping up overnight. A home wallbox at 7 kW adds about 40 to 50 km (25 to 30 miles) an hour and fills most cars overnight. Rapid DC chargers at 50 kW and above add range in minutes, but cost more per kWh.
To compare running costs with a petrol or diesel car, work out the fuel cost of the same trip with the fuel cost calculator, and for the distance itself, use the distance calculator.
Cheaper charging
Many electricity tariffs have cheaper night rates; scheduling charging for those hours can halve the cost. Keeping the battery between about 20% and 80% for daily use is easier on it, and the top 20% is the slowest part to charge anyway.
How to use it
- Enter the battery capacity in kWh and the percentage you start and stop at.
- Pick the charger, from a household socket to a 150 kW rapid charger.
- Enter your electricity price to see the cost.
Privacy & limitations
Everything is calculated in your browser.
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Frequently asked questions
Why does charging slow down above 80%?
As a lithium-ion battery fills, the car reduces the charging current to protect it, so the last 20% on a rapid charger can take about as long as the first 60%. On long trips, charging to 80% and stopping again is often quicker.
Why doesn't my car charge at the charger's full power?
On AC, the car's own on-board charger sets the limit, often 7 to 11 kW, so a 22 kW public charger may still only deliver 7 kW. On DC, the car's maximum charging rate and the battery's temperature set it.
How much does it cost to charge an electric car at home?
Multiply the energy drawn by your price per kWh. A 60 kWh battery charged from 20% to 80% takes about 36 kWh into the battery, roughly 40 kWh from the socket; at 0.15 per kWh that is about 6.
Is a household socket safe for charging?
For occasional charging, using the cable supplied with the car and a socket in good condition, usually yes; for regular charging, a dedicated wallbox installed by an electrician is faster and safer.
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