# EV Charging Cost Calculator Calculate your real annual EV charging cost split between home and public charging, including charging loss. --- - **Canonical URL:** https://dothecalculation.com/calculators/ev-charging-cost-calculator - **Category:** Eco & Sustainability - **Publisher:** Do The Calculation (https://dothecalculation.com) - **Cost:** Free, no account or sign-up required - **Privacy:** Runs entirely in the browser; inputs are never sent to a server - **Methodology:** https://dothecalculation.com/methodology --- ## EV Charging Cost Calculator — Home vs Public Charging Work out your real annual EV charging bill from mileage, vehicle efficiency, home and public electricity rates, and how you actually split charging between the two. Includes the AC-to-battery charging loss most calculators skip. - Real 2026 US average residential rate built in as a default - Splits cost between home and public/DC fast charging - Accounts for the ~10% energy lost between wall and battery ## Quick Answer — What Does It Cost to Charge an EV? Charging cost per mile is **(vehicle efficiency in kWh per 100 miles ÷ charging efficiency) × electricity rate ÷ 100**. For a typical EV at 27 kWh/100 mi on the 2026 US average residential rate of $0.1883/kWh, charged entirely at home, that works out to about **$0.058 per mile** before charging losses, or roughly **$0.064 per mile** once the ~10% wall-to-battery loss is included. **Quick reference (annual cost, 12,000 miles/year, charged 100% at home):** • Efficient EV (22 kWh/100 mi) → **$517/year** • Typical EV (27 kWh/100 mi) → **$635/year** • Larger/less efficient EV (33 kWh/100 mi) → **$776/year** Public charging — especially DC fast charging — typically costs **2 to 3 times** the home rate, commonly $0.35–$0.48/kWh versus $0.12–$0.25/kWh at home depending on your utility. Most owners do the bulk of their charging at home and only use public chargers occasionally, which is why this calculator lets you set the split rather than assuming one rate for everything. ## How to Use This Calculator Enter your annual mileage, your vehicle's rated efficiency in kWh per 100 miles (check your EPA window sticker or owner's manual — most mainstream EVs land between 24 and 33 kWh/100 mi), your home electricity rate, the percentage of miles you charge at home versus on public chargers, your public charging rate, and the charging loss percentage (10% is a reasonable default for Level 2 AC charging). **Worked example:** 12,000 annual miles, 27 kWh/100 mi rated efficiency, $0.1883/kWh home rate, 80% of miles charged at home, $0.42/kWh public rate, 10% charging loss. First, the loss-adjusted wall efficiency is 27 ÷ 0.90 = **30 kWh/100 mi**. Home miles = 12,000 × 0.80 = 9,600 miles, needing 9,600 ÷ 100 × 30 = **2,880 kWh**, costing 2,880 × $0.1883 = **$542.30**. Public miles = 2,400, needing 720 kWh, costing 720 × $0.42 = **$302.40**. Total annual cost = $542.30 + $302.40 = **$844.70**, or **$70.39/month**, which is **$0.0704 per mile**. **A second example, home-only charging:** 15,000 annual miles, a more efficient 24 kWh/100 mi vehicle, a cheaper $0.15/kWh home rate, 100% home charging, same 10% loss. Wall efficiency = 24 ÷ 0.90 = 26.67 kWh/100 mi. Total energy = 15,000 ÷ 100 × 26.67 = **4,000 kWh**, costing 4,000 × $0.15 = **$600/year** — **$50/month**, or **$0.04 per mile**. Notice this driver covers 25% more miles for **29% less** total cost than the first example, almost entirely because of the cheaper rate and 100% home-charging mix. For a side-by-side against continuing to drive a gas vehicle on the same annual mileage, run both scenarios through the [EV vs gas savings calculator](/calculators/ev-vs-gas-calculator). ## The Formula This Calculator Uses **Loss-adjusted wall efficiency (kWh/100 mi)** = Rated efficiency ÷ (1 − Charging loss %). This is the energy you actually draw from the wall, not just what ends up stored in the battery. **Home miles** = Annual mileage × Home charging share %. **Public miles** = Annual mileage × (1 − Home charging share %). **Home energy (kWh)** = (Home miles ÷ 100) × Wall efficiency. **Public energy (kWh)** = (Public miles ÷ 100) × Wall efficiency. **Home cost** = Home energy × Home rate. **Public cost** = Public energy × Public rate. **Total annual cost** = Home cost + Public cost. **Cost per mile** = Total annual cost ÷ Annual mileage. **Monthly cost** = Total annual cost ÷ 12. **Why charging loss matters:** Level 2 AC charging typically loses 8–12% of energy to heat during the AC-to-DC conversion that happens inside the vehicle's onboard charger. DC fast charging skips that conversion (it feeds DC power directly to the battery) and usually loses less, so if most of your public charging is DC fast charging, a lower loss percentage for that portion would be more accurate — this calculator applies one loss rate across both for simplicity, which is a stated limitation, not an oversight. ## Home Rate vs Public Rate — Why the Split Matters So Much The single biggest lever in this calculator isn't efficiency — it's the home/public charging split. Public DC fast charging networks price at a premium because they're capital-intensive to build and often bill for convenience and speed rather than raw electricity cost; $0.35–$0.48/kWh is common in the US as of 2026, against $0.1883/kWh as the national residential average (ranging roughly $0.12–$0.42/kWh by state). That means a driver who does 50% of their charging on public DC fast chargers instead of 20% can see their annual cost rise by hundreds of dollars on identical mileage and identical vehicle efficiency. If your daily routine allows for home or workplace Level 2 charging most nights, shifting even 10–20 percentage points of your mix back toward home charging is usually the single highest-leverage change available — well ahead of shopping for a marginally more efficient vehicle. Idle appliances and standby power draw are a separate, smaller cost category — if you're auditing your full home energy bill rather than just EV charging, the [smart power strip calculator](/calculators/smart-power-strip-calculator) and the [fuel cost calculator](/calculators/fuel-cost-calculator) (for comparing against a gas vehicle you're considering instead) cover the adjacent pieces this tool doesn't. ## What This Calculator Doesn't Account For This model assumes a flat electricity rate. Many utilities offer time-of-use (TOU) plans with off-peak rates as low as $0.08–$0.12/kWh overnight — if your utility offers TOU pricing and you can schedule charging for off-peak hours, your real home cost could be meaningfully lower than the flat-rate default used here. It also doesn't include the fixed cost of installing a home Level 2 charger (typically $500–$2,000 including electrician labor), any EV-specific utility program discounts, or seasonal efficiency loss — EVs typically use 10–40% more energy per mile in cold weather due to cabin heating and reduced battery efficiency, so a winter-heavy driving pattern will run above this calculator's year-round average. Finally, this tool reports charging cost only, not total cost of ownership. It does not include maintenance, insurance, depreciation, or the vehicle's purchase price — those belong in a separate ownership-cost comparison. ## Frequently asked questions ### What's a typical kWh per 100 miles figure for a mainstream EV? Most 2026 mainstream EVs land between 22 and 33 kWh per 100 miles in real-world driving, with the most efficient models (like long-range sedans) below 20 and larger SUVs or trucks above 35. Check your vehicle's EPA window sticker for the exact rated figure. ### Why is my public charging rate so much higher than my home rate? Public networks, especially DC fast chargers, price to cover expensive hardware, real estate, and grid connection costs, and often charge a convenience premium for speed. $0.35–$0.48/kWh is a common 2026 range versus roughly $0.12–$0.25/kWh at home. ### Does this calculator include the cost of installing a home charger? No — that's a one-time hardware and installation cost (typically $500–$2,000), separate from the ongoing per-kWh charging cost this calculator estimates. ### Why does the calculator add a charging loss percentage on top of my vehicle's rated efficiency? Because your vehicle's rated efficiency describes energy delivered to the battery, but you pay for energy pulled from the wall. AC Level 2 charging typically loses 8–12% to heat during AC-to-DC conversion, so the wall-drawn energy is higher than the battery-stored energy. ### Does cold weather really change my charging cost? Yes, often significantly. Cabin heating and reduced battery efficiency in cold weather can raise real-world energy use by 10–40% compared to mild-weather driving, which this calculator's year-round average does not separately model. ### How does this differ from the EV vs gas calculator on this site? This calculator isolates and breaks down charging cost itself — home versus public, cost per mile, monthly and annual totals. The EV vs gas savings calculator compares that charging cost against an equivalent gasoline vehicle's fuel cost on the same mileage. ### Should I use time-of-use off-peak rates instead of my flat rate? If your utility offers TOU pricing and you can schedule charging for off-peak hours (often overnight), yes — those rates can run well below the flat residential average used as this calculator's default, lowering your real annual cost. ## Related concepts - **Charging loss** — Energy lost as heat when AC power from the wall is converted to DC power for the battery, typically 8-12% for Level 2 home charging. - **Time-of-use (TOU) rate** — A utility pricing plan where electricity costs less during off-peak hours, often overnight, which can substantially lower EV charging cost. - **DC fast charging** — High-power public charging that feeds DC current directly to the battery, charging faster than Level 2 AC but usually at a higher per-kWh price. ## Related guides - [EV vs Gas Savings: Compare Fuel Cost, Charging Cost, and Annual Savings](https://dothecalculation.com/blog/green/electric-vehicle-savings-analysis) — Compare electric vehicle charging cost with gasoline fuel cost using annual mileage, gas price, MPG, electricity rate, and EV kWh per mile. ## Related calculators - [EV vs Gas Savings Calculator](https://dothecalculation.com/calculators/ev-vs-gas-calculator) — Compare gasoline costs with electric vehicle charging rates across various mileages to see how much you could save by switching to an EV. - [Vampire Draw & Standby Power Cost Calculator](https://dothecalculation.com/calculators/vampire-power-drain-calculator) — Calculate the annual cost and greenhouse gas emissions generated by standby vampire power draw from idle home appliances. - [Broker & Agent Commission Split Calculator](https://dothecalculation.com/calculators/real-estate-agent-commission-calculator) — Calculate real estate listing and buying commissions and see how they split between agents and brokers on a home sale transaction. - [Appliance Energy Cost Calculator](https://dothecalculation.com/calculators/appliance-energy-calculator) — Calculate power costs for home appliances based on wattage, usage hours, and local utility rates to find your biggest energy expenses. - [Double Pane Window Retrofit ROI & Payback Calculator](https://dothecalculation.com/calculators/double-glazing-payback-calculator) — Calculate heating and cooling energy loss reduction, fuel cost savings, and payback period for double pane or Low-E window retrofits. - [Eco-Commute & Work-From-Home Savings Calculator](https://dothecalculation.com/calculators/eco-commute-wfh-calculator) — Project transit expenses, travel times, and carbon emissions saved by using public transit, carpooling, or working from home instead of driving. --- _This calculator is for educational and budgeting purposes. Actual charging costs vary by utility rate structure, vehicle efficiency in real-world conditions, climate, and charging network pricing. Verify current rates with your utility and preferred charging networks before relying on this estimate for a major purchase decision._ --- _Source: [Do The Calculation](https://dothecalculation.com/calculators/ev-charging-cost-calculator). Quote freely with attribution and a link to this page._