EV Charging Calculator

- May 10, 2025
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Calculate charging costs, time, and range for electric vehicles based on battery capacity, charger power, and electricity rates.

Vehicle Information

kWh
miles/kWh

Charging Parameters

%
%

Charger Information

kW
%
£ per kWh

Advanced Options

About EV Charging

Electric vehicles can be charged at different speeds depending on the charging equipment. Understanding charging times, costs, and efficiency can help you optimise your EV ownership experience.

Charging Types
  • Level 1 (120V): Standard household outlet, typically 1.4 kW to 1.9 kW. Slowest charging option.
  • Level 2 (240V): Dedicated home or public charger, typically 3.3 kW to 19.2 kW. Most common for daily charging.
  • DC Fast Charging: High-powered stations, 50 kW to 350+ kW. Fastest option for long-distance travel.
Home vs. Commercial Charging
  • Home Charging: Typically the most cost-effective option, with rates based on your residential electricity plan.
  • Commercial/Public Charging: Often more expensive than home charging, with rates varying by network and location.
  • Workplace Charging: May be free or subsidised by employers as an employee benefit.
  • Tesla Supercharger: Exclusive network for Tesla vehicles with location-based pricing.
  • Electrify America/EVgo/ChargePoint: Major charging networks with membership options that may reduce per-kWh rates.
Charging Calculation Formulas
  1. Energy Added (kWh): Battery Capacity × (Target SoC - Current SoC) ÷ 100
  2. Charging Time (hours): Energy Added ÷ Charger Power × (100 ÷ Charger Efficiency)
  3. Total Cost (£): Energy Consumed × Electricity Rate
  4. Range Added (miles): Energy Added × Vehicle Efficiency
Factors Affecting Charging
  • Most EV batteries charge fastest between 20% and 80% SoC
  • DC Fast Charging slows down significantly above 80% to protect the battery
  • Charging at home during off-peak hours can reduce costs significantly
  • Battery efficiency decreases in extreme temperatures
  • Preconditioning your battery before fast charging can improve charging speed
  • Older batteries may charge more slowly than newer ones
  • Premium/luxury EVs often support higher charging speeds

What is the EV Charging Calculator?

The EV Charging Calculator is a handy tool that helps electric vehicle (EV) owners estimate how much it will cost to charge their car, how long it will take, and how far they can drive after charging. By inputting key details like battery capacity, vehicle efficiency, and charger type, users can get quick and accurate results tailored to their specific setup. This makes planning charging sessions convenient and straightforward.

Understanding Your Vehicle's Needs

Every electric vehicle has different specifications which affect charging requirements. The calculator allows you to input your vehicle model, battery capacity, and efficiency rate. This information is crucial because:

  • Battery capacity affects how much energy you need to charge.
  • Vehicle efficiency tells you how far you can drive on each kilowatt-hour (kWh).
  • Knowing your car model helps tailor the calculations based on specific performance data.

Charging Parameters Made Simple

In order to estimate charging costs and time, you need to set a few charging parameters. You can specify your current state of charge (SoC) and your target SoC. This helps the calculator determine how much energy you need to add. With straightforward inputs, you can easily see how much energy is required to reach your desired charge.

Choosing the Right Charger

The type of charger you use plays a huge role in how quickly your vehicle charges. The calculator can select from various charger options like Level 1, Level 2, or DC Fast Charging. Each type has different power levels and speeds. You can also input custom charger information to get the most accurate results. Here’s why this matters:

  • Level 1 chargers are the slowest, great for overnight charging.
  • Level 2 chargers are faster and ideal for daily use.
  • DC Fast Chargers are for quick top-ups during long trips.

Calculating Costs Efficiently

The calculator also helps you understand the Financial aspect of charging. By entering your electricity rate, it can estimate the total cost of charging. This allows you to budget better and explore options for cheaper charging rates, whether at home or at public stations.

Getting Detailed Results

Once you've input all the necessary information, the calculator provides detailed results such as charging time, total cost, energy added, and range added. This makes it easier to see the benefits of choosing different charging options or settings. Knowing these details can help you make smarter charging decisions.

Advanced Options for Precision

If you want to dive deeper, the calculator offers advanced options. You can apply things like charging curves for fast chargers and temperature adjustments. These features allow for more accurate results by considering real-world factors that can affect charging efficiency, such as extreme weather or charger performance variances.

Maximise Your EV Experience

Using the EV Charging Calculator regularly can help enhance your electric vehicle ownership. By understanding your charging costs, times, and options, you can make informed choices that can lead to savings and a more enjoyable driving experience. Whether you’re a new EV owner or a seasoned driver, this tool is essential for managing your vehicle's energy needs effectively.