Use this handy **battery charging cost calculator** for estimating the expenses of charging batteries, typically for **electric vehicles (EVs)** or other large rechargeable battery systems.

To tool will calculate the approximate cost of charging a battery based on various factors, such as

Battery capacity(in kWh), electricity rate(price per kWh),charging efficiencyetc.

## Battery Charging Cost Calculator

Device | Battery Capacity (kWh) | Electricity Rate ($/kWh) | Charging Efficiency | Charging Cost | Charging Time (7.2 kW charger) |
---|---|---|---|---|---|

Smartphone | 0.015 | 0.13 | 0.80 | $0.002 | 0.002 hours (7.5 sec) |

Laptop | 0.1 | 0.13 | 0.85 | $0.015 | 0.014 hours (50 sec) |

E-bike | 0.5 | 0.13 | 0.90 | $0.072 | 0.069 hours (4.1 min) |

Electric Scooter | 0.6 | 0.13 | 0.85 | $0.092 | 0.083 hours (5 min) |

Electric Lawnmower | 2.5 | 0.13 | 0.90 | $0.361 | 0.347 hours (20.8 min) |

Nissan Leaf | 40 | 0.13 | 0.90 | $5.778 | 5.556 hours |

Tesla Model 3 LR | 82 | 0.13 | 0.90 | $11.844 | 11.389 hours |

## Battery Charging Cost Calculation Formula

The fundamental formula for calculating battery charging cost is:

**Cost = (Battery Capacity * Electricity Rate) / (Charging Efficiency)**

Where:

Battery Capacityis measured in kWhElectricity Rateis the cost per kWhCharging Efficiencyis expressed as a decimal (e.g., 0.90 for 90% efficiency)

Let’s consider an electric scooter with a 0.5 kWh battery:

- Battery Capacity: 0.5 kWh
- Electricity Rate: $0.15 per kWh
- Charging Efficiency: 85% (0.85)

**Cost = (0.5 kWh * $0.15/kWh) / 0.85
Cost = $0.075 / 0.85
Cost = $0.088 (rounded to nearest cent)**

In this scenario, charging the scooter’s battery would cost approximately **9 cents**.

## How do you calculate the cost of charging a battery?

To calculate the cost of charging a battery, follow these steps:

**Determine the battery capacity**in kWh**Find your local electricity rate**(often listed on your utility bill)**Estimate the charging efficiency**(if unknown, assume 85-90%)**Apply the formula**mentioned above

Let’s calculate the cost of charging a Tesla Model 3 Long Range:

Battery Capacity: 82 kWh

Electricity Rate: $0.12 per kWh (national average)

Charging Efficiency: 90% (0.90)

**Cost = (82 kWh * $0.12/kWh) / 0.90
Cost = $9.84 / 0.90
Cost = $10.93**

Therefore, fully charging this **Tesla Model 3** from **0% to 100%** would cost approximately **$10.93** under these conditions.

## How do you calculate battery charging time per kWh?

Calculating charging time involves considering the power output of the charger. The formula is:

**Charging Time (hours) = Battery Capacity (kWh) / Charger Power Output (kW)**

Let’s determine the charging time for a **Nissan Leaf** with a **40 kWh battery** using a **7.2 kW home charger:**

**Charging Time = 40 kWh / 7.2 kW
Charging Time = 5.56 hours**

This Nissan Leaf would take approximately **5 hours and 34 minutes** to charge fully from empty.

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