EV Charging Cost Calculator

How to use it

1. Choose a country or currency. Picking Australia, the UK, Germany, Malaysia or Singapore pre-fills example prices. Each shows its source and date. Overwrite any of them with your own figures.
2. Enter your car's energy use in kWh per 100 km.
   • Best: your car's long-term average from the trip computer.
   • Otherwise: the manufacturer's official (WLTP) figure, if published. Expect real-world use to be higher in cold weather and at motorway speeds.
   • Driving in miles? Enter miles/kWh and the calculator converts it.
3. Enter how far you drive per week or per month.
4. Enter your prices.
   • Home electricity: the unit rate on your bill (per kWh). If you charge on an off-peak or EV tariff, use that rate.
   • Public DC charging: the per-kWh price you usually pay at fast chargers.
5. Set your home/public split. For example 80% home, 20% public.
6. Optional: charging session. Enter your battery size and a start and end percentage (e.g. 20% → 80%) to see the energy added and what that session costs.
7. Optional: petrol comparison. Enter the fuel use of a comparable petrol car (L/100 km) and the pump price.

What you get

• Cost per 100 km at home, at public chargers and for your mix
• Cost per week, month and year for your driving
• Cost of one charging session (if you enter battery size and charge range)
• Petrol cost per 100 km and per month, and the difference

How it's calculated

• Blended electricity price = (home share × home price) + (public share × public price)
• Cost per 100 km (EV) = consumption (kWh/100 km) × blended price
• Monthly cost (EV) = (km per month ÷ 100) × cost per 100 km. Weekly figures are converted using 52 weeks ÷ 12 months.
• Energy for one session = battery size (kWh) × (end % − start %)
• Cost per 100 km (petrol) = fuel use (L/100 km) × pump price
• Miles conversion: 1 mile = 1.609344 km. kWh/100 km = 100 ÷ (miles/kWh × 1.609344).

Assumptions and limits

• Charging losses. Some energy is lost between the wall and the battery. If your consumption figure comes from the car's trip computer, it may not include those losses. You can add an allowance with the optional "charging loss %" field, which defaults to 0%.
• Standing charges and subscriptions are not included. You pay a home daily supply/standing charge whether or not you own an EV, so the calculator uses the unit rate only. If you pay a charging-network subscription, add it separately.
• Solar. If you charge from rooftop solar, the "price" of that electricity is roughly the feed-in payment you give up by not exporting it. Enter that figure as your home price if you want to model it.
• Example prices are references, not your tariff. Some, such as Australia's Default Market Offer, are maximum prices for default plans. Others are national averages. All are dated, and prices in 2026 have moved quickly.
• Weather and speed. Consumption is higher in cold weather and at high speeds. See why EV range drops in winter.

FAQ

Where do the example prices come from? From regulators and official statistics where possible: Ofgem (UK electricity), the UK government's weekly fuel price data, Australia's AER Default Market Offer, BDEW and ADAC (Germany), Malaysia's Energy Commission tariff schedule and Ministry of Finance fuel prices, and SP Group (Singapore). Each default shows its source and date. Where no reliable figure exists, the field is blank.

Why does public fast charging look as expensive as petrol? It can be. In the UK, for example, the average rapid-charger price in August 2026 was 77p/kWh (Zapmap). At that price an efficient EV can cost about as much per mile as an economical petrol car. The savings mostly come from home charging. See our UK and Australia guides.

What consumption figure should I use for my car? Your own long-term average is best. For some popular Chinese-brand models we list the official figures in our model data, where the manufacturer publishes one.

Does the calculator include the cost of a home charger? No. It calculates running costs only.

Is my data saved? No. Everything is calculated in your browser and nothing is sent to us. If the page offers to remember your inputs, they are stored only in your own browser.

Can I use it for a plug-in hybrid? Only for the electric part of your driving. It doesn't model mixed petrol and electric use.

Disclaimer

This calculator gives estimates for information only. It isn't financial advice and doesn't replace your energy supplier's or charging network's actual prices. Check your tariff, local fuel prices and your car's real consumption before making decisions. Brand and model names are used for identification only; this site isn't affiliated with any manufacturer.