All the calculations heroAll The Calculations

finance calculator

EV Charging Cost Calculator

Estimate energy needed, miles added, and cost to charge an EV at home vs public rates.

Results

Energy needed
45.00 kWh
Cost at home rate
$6 USD
Cost at public rate
$16 USD
Miles of range added
144.00

How to use this calculator

  1. Enter battery size and starting/target charge.
  2. Add home and public $/kWh rates, efficiency, and an optional loss factor.
  3. See kWh needed, cost at home/public, and miles added.

Inputs explained

Battery capacity (kWh)
Total battery size of your EV.
Starting/Target charge (%)
Current SOC and desired SOC to calculate energy needed.
Home rate / Public rate ($/kWh)
Your electricity rates for home and public/DC fast charging.
Efficiency (mi/kWh)
Miles per kWh your EV typically achieves.
Loss factor (%)
Optional charging loss percentage (e.g., 10% = enter 10). Defaults to 0 for simplicity.

How it works

Energy needed = battery capacity × (target % − start %) × loss factor.

Home/public cost = energy needed × respective $/kWh.

Miles added uses your efficiency (mi/kWh).

Formula

kWh needed = Capacity × (Δ% / 100) × (1 + loss%)
Cost = kWh × Rate
Miles added = kWh × mi/kWh

When to use it

  • Comparing home vs public/DC fast charging costs.
  • Estimating cost of partial charges (e.g., 20% → 80%).
  • Planning trip charging costs and miles added.

Tips & cautions

  • DC fast rates are often higher; use accurate pricing for your area/network.
  • Add a loss factor (~5–12%) to better reflect charging inefficiency.
  • Does not include demand charges or session fees; focuses on per-kWh pricing.
  • Loss factor is a simple percentage; real losses vary with temperature and charge speed.

Worked examples

75 kWh pack, 20% → 80%, 10% loss

  • Energy ≈ 49.5 kWh
  • Home ≈ $6.44
  • Public ≈ $17.33
  • Miles ≈ 158

60 kWh pack, 10% → 90%, 8% loss

  • Energy ≈ 51.8 kWh
  • Home ≈ $6.73
  • Public ≈ $18.13
  • Miles ≈ 165.8

Deep dive

This EV charging cost calculator estimates kWh needed, cost at home vs public rates, and miles added. Enter battery size, start/target SOC, rates, efficiency, and an optional loss factor to compare charging options.

Use it to budget home charging, understand DC fast charging premiums, and plan trip costs based on your EV’s efficiency.

FAQs

Does this include charging losses?
Yes, optionally. Use the loss factor input (e.g., 10% losses) to reflect charging inefficiency.
How do demand charges affect cost?
This focuses on per-kWh pricing. DC fast chargers with session fees or demand charges will change totals.

Related calculators

finance

Appliance Electricity Cost Calculator

Estimate daily, monthly, and yearly energy use and cost for any appliance.

finance

Solar Payback Calculator

Estimate solar net cost, payback period, and 10-year savings with degradation.

Rates vary by region and provider. Always check your utility or charger pricing.