EV Charging Cost Calculator

Worldwide · use your local inputs

Enter values for your location and use the units shown. Starting values are examples, not automatically detected local prices or conditions. Country-specific worked examples below are labelled as references.

EV charging calculator

ENTER YOUR VEHICLE DETAILS

EV Battery Capacity

50 kWh

Charge My Battery From

20% – 80%

Set to 20%–80% by default, which is the recommended range to preserve battery health and charge fastest. Check your owner's manual for vehicle-specific recommendations.

Charger Power / Speed

1.92 kW

Charging speed

1.92 kW

Estimated charging time

~17h 22min

Energy added to battery: 30.0 kWh (33.3 kWh total drawn from grid)

EV charging time formula

Calculating EV charging time is simple: divide the energy your battery needs (in kWh) by your charger's power rating (in kW), accounting for charger efficiency.

Energy needed (kWh)Charger power (kW) × Efficiency

=Charging time (Hours)

EXAMPLE 1 — HOME LEVEL 2 CHARGING

Home Wallbox Charging (7.68 kW)

A Tesla Model 3 with an 80 kWh battery size plugs into a 7.68 kW Level 2 home wallbox at 20% battery, charging up to 80%.

Step 1: Calculate energy needed in battery

80% target − 20% starting = 60% charge needed

80 kWh battery × 0.60 = 48 kWh needed

48 kWh (energy needed)7.68 kW (charger power) × 0.90 (AC efficiency)

=~6h 56min charging time

EXAMPLE 2 — PUBLIC DC FAST CHARGING

Public DC Fast Charging (150 kW)

A Hyundai Ioniq 5 with a 77.4 kWh battery stops at a 150 kW DC Fast Charger at 10% battery, charging up to 80%.

Step 1: Calculate energy needed in battery

80% target − 10% starting = 70% charge needed

77.4 kWh battery × 0.70 = 54.18 kWh needed

54.18 kWh (energy needed)150 kW (charger power) × 0.95 (DC efficiency)

=~23 min charging time

Factors that affect EV's charging time

Weather

Cold temperatures increase internal battery resistance, slowing chemical reactions and extending charging times, particularly for DC fast charging where battery thermal management actively regulates power input.

Charging Station Level

Charging speed varies dramatically depending on the station type: Level 1 standard household outlets (1.2–1.92 kW AC), Level 2 dedicated wallboxes (3.3–19.2 kW AC), and Level 3 DC Fast Chargers (50–350 kW DC).

Load Sharing

Some charging stations support load sharing or load management technology, which distributes available electrical power across multiple vehicles charging simultaneously. This distribution can be done equally to all charging vehicles, or on a first-come, first-served basis. Both methods can lead to extended charge times for users. However, these distribution systems are essential for many properties to ensure power usage stays within the grid’s limitations.

EV Maximum Charging Rate

Your EV's onboard charger limits maximum AC charging speed regardless of station power rating. For example, a vehicle equipped with a 7.2 kW onboard charger will only draw 7.2 kW even if plugged into an 11.5 kW Level 2 station.

Battery Deterioration

Over time and hundreds of charge cycles, natural battery cell degradation affects internal resistance and energy retention, slightly altering charging curves and optimal charging performance.

Battery’s State of Charge

Charging speed is highest when the battery is empty (between 10% and 80%). Past 80% state of charge, the battery management system (BMS) intentionally tapers charging power to protect battery health and prevent overheating.

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Published August 5, 2026Updated September 7, 2026Formula, sources & limitations

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HOW IT WORKS

Examples retain the currency, units and country rules stated in each example. Use your own local inputs in the calculator above.

How does the EV charging cost calculator work?

The calculator determines total energy delivered to your battery, accounts for AC-to-DC charging efficiency losses, and converts electricity costs into per-session, per-kilometre, per-mile, monthly, and annual figures in your local currency.

Enter your battery & charge levels

Set your battery capacity (kWh), starting charge %, and target charge % (e.g., 20% to 80%).

Select your electricity tariff & currency

Input your local residential tariff or public fast charger rate per kWh in any of 95 supported currencies.

Choose distance & efficiency units

Toggle between kilometres (kWh/100 km, Wh/km, km/kWh) and miles (mi/kWh, Wh/mi) to view exact driving costs.

Understanding EV charging costs: Home vs. Public Fast Charging

The cost to charge an electric car depends heavily on where you plug in. Charging at home on a standard Level 1 or Level 2 AC charger is usually the cheapest method, using your local residential utility tariff rate (typically $0.10–$0.25 per kWh depending on your country and region). Public Level 3 DC fast chargers (e.g., Tesla Superchargers, Electrify America, Ionity, BP Pulse) can cost 2x to 4x more per kWh ($0.35–$0.65+ per kWh) due to high demand charges and equipment infrastructure costs.

THE CALCULATIONEnergy Required (kWh) = [Battery Capacity × (Target % − Start %)] ÷ Charging Efficiency

Total Charging Cost = Energy Required (kWh) × Rate per kWh

Worked Example: Charging a 60 kWh Electric Car from 20% to 80%

EXAMPLE

60 kWh EV, charging from 20% to 80% at home ($0.15/kWh, 90% AC efficiency)

Suppose you own a standard electric hatchback with a 60 kWh battery and plug in at home overnight when your battery reaches 20%. You want to charge it back up to 80% for daily commuting.

Net energy added to battery: 60 kWh × (80% − 20%) = 36 kWh.
Gross energy drawn from wall grid (90% charger efficiency): 36 kWh ÷ 0.90 = 40 kWh.
Total session cost: 40 kWh × $0.15/kWh = $6.00.
Cost per 100 km (at 5 km/kWh efficiency): 40 kWh ÷ 300 km = $0.02 per km ($2.00 per 100 km).

Result: $6.00 for a 60% top-up, adding ~300 km (~186 miles) of driving range for just $2.00 per 100 km.

Comparison: Home Charging vs. Public DC Fast Charger

Home Level 2 Charging

Average rate: $0.12 – $0.20 / kWh. Best for daily overnight top-ups. Low cost, high efficiency (88%–92%).

Public DC Fast Charger

Average rate: $0.35 – $0.65 / kWh. Best for long-distance road trips. Higher cost, lower efficiency (92%–95%).

Solar-Powered Home Charging

Average rate: $0.00 – $0.06 / kWh (avoided grid cost). Net-zero daily driving when paired with rooftop PV.

Workplace / Free Public Charging

Average rate: $0.00 / kWh. Free perk offered by employers, shopping centers, or municipal lots.

Tips to lower your monthly EV charging costs

1. Switch to a Time-of-Use (TOU) electricity tariff: Many utilities offer discounted off-peak rates (e.g. 50% cheaper between midnight and 6 AM) for EV owners.
2. Charge with Home Solar: If you have rooftop solar panels, schedule your charging session during peak sun hours or use a solar-matching EV charger.
3. Limit DC Fast Charging for Road Trips: Rely on Level 2 home or workplace charging for daily needs to save money and extend battery longevity.

Calculate your charging cost Estimate EV charging time Compare EV vs petrol & gas savings Calculate EV driving range

FREQUENTLY ASKED QUESTIONS

Global EV Charging Cost Questions & Answers

Detailed explanations of electricity tariffs, public network billing, charging efficiency losses, and metric/imperial conversions.

How much does it cost to charge an electric car at home?

Home EV charging costs depend on your local utility tariff rate per kWh and battery capacity. On average, fully charging a standard 60 kWh electric car at home costs between $6.00 and $12.00 (at $0.10–$0.20 per kWh) to cover 200–250 miles of driving range.

How do I calculate EV charging cost per 100 km or per mile?

To calculate cost per distance: divide your electricity tariff per kWh by your vehicle's efficiency rating (km/kWh or mi/kWh), and divide by your charger's efficiency (e.g. 0.90 for Level 2 AC). For example, at $0.20/kWh and 5 km/kWh with 90% efficiency, driving costs $0.044 per km ($4.44 per 100 km).

Is public DC fast charging more expensive than home EV charging?

Yes. Public Level 3 DC fast chargers generally cost 2x to 4x more per kWh than residential electricity rates due to grid demand charges and station operator fees. While home charging averages $0.15/kWh, public fast charging ranges from $0.35 to $0.65/kWh.

How long does it take to charge an EV battery from 20% to 80%?

Charging time depends on charger output (kW) and battery size (kWh). On a standard 7.2 kW Level 2 home wallbox, a 60 kWh EV takes about 5 hours to charge from 20% to 80%. On a 150 kW DC fast charger, that same charge takes roughly 20 to 25 minutes.

Why does EV charging speed slow down after 80% state of charge?

Electric vehicle battery management systems (BMS) intentionally taper charging power past 80% state of charge to protect battery chemical health, prevent overheating, and maximize battery lifespan. AC-to-DC energy conversion also introduces 5% to 10% thermal efficiency loss.

Can I calculate EV charging cost savings with rooftop solar panels?

Yes. By powering your EV with home rooftop solar energy instead of grid power, you eliminate or drastically lower your per-kWh charging expenses. Input your solar coverage percentage to view your net monthly and annual charging savings.