EV Range Calculator

Sources & Methodology

Last reviewed and verified: April 2026

How EV Range Works — The Real Formula and Why the EPA Number Lies (A Little)

Every EV has two range numbers: the EPA-rated number on the window sticker, and the actual number you see on the road. That gap isn’t a scam — it’s physics. The EPA tests at 68-72°F with no air conditioning, at speeds that average much lower than typical highway driving. Your commute happens in January at 25°F with the heater running and at 72 mph on the interstate. Those are completely different conditions.

The formula itself is simple: Range = Usable battery (kWh) × efficiency (miles per kWh) × state of charge. A 75 kWh battery at 80% charge with 3.5 miles per kWh gives you 75 × 3.5 × 0.80 = 210 miles. Apply a cold-weather factor of 0.75 for a 25°F day, and that drops to 157 miles. That’s not a manufacturer lie — that’s thermodynamics. The calculator above applies these factors automatically.

Why EV Range Drops So Dramatically in Cold Weather

Cold weather is the single biggest real-world range reducer, and it catches new EV owners off guard. At 20°F, most EVs lose 25 to 35% of their range. There are two reasons working against you simultaneously. First, lithium-ion batteries generate less usable power at cold temperatures because the chemical reactions that release electrons slow down — the same reason your phone dies faster outside in winter. Second, gas cars get their cabin heat “for free” from waste engine heat. EVs don’t have that. The heater runs on battery, and it can draw 3 to 5 kW continuously — eating into your range budget from the moment you start driving.

The fix: precondition your EV while it’s still plugged in. Set a departure time and let the car warm the cabin and battery using grid power before you unplug. On a cold morning, this can recover 30 to 50% of the cold-weather range penalty. Every modern EV supports this through the companion app.

Speed vs Range — The 70 mph Problem

Here’s something most EV buyers don’t fully absorb until their first road trip: aerodynamic drag increases with the square of speed. Going from 60 to 70 mph is only a 17% speed increase, but aerodynamic drag increases by 36%. A car needs roughly 0.30 kWh per mile at 60 mph and 0.40 kWh per mile at 75 mph — a 33% jump in energy consumption for a 25% increase in speed. This is why your highway range is genuinely much lower than EPA figures, and why slowing down from 75 to 65 mph on a long road trip adds 30 to 40 miles of usable range.

EV Charging Time — The Level 1 / Level 2 / DC Fast Charge Breakdown

The charging time formula is straightforward: Hours = kWh needed ÷ Charger power (kW). What trips people up is understanding why the same car charges so differently depending on the equipment. A standard 120V household outlet (Level 1) delivers only 1.4 kW. That 75 kWh battery charged from 20% to 80% needs 45 kWh, which takes 45 ÷ 1.4 = 32 hours on Level 1. That same charge on an 11.5 kW Level 2 home charger takes about 4 hours — perfect for overnight charging. A 150 kW DC fast charger does it in under 30 minutes.

Real-World EV Range Reference — 2024-2026 Popular Models vs EPA

The gap between EPA range and what you actually see varies a lot by model. Some EVs (Hyundai Ioniq 6, Tesla Model 3) are remarkably close to EPA in real-world testing. Others fall further short, especially on pure highway runs or in cold weather. This table shows EPA-rated range alongside Edmunds real-world test results where available — the most reliable comparison since Edmunds uses a consistent 60% city / 40% highway test cycle at actual road speeds.

The Ford F-150 Lightning showing the biggest gap between EPA and real-world is typical for trucks — their large frontal area creates significant drag at highway speeds. The Ioniq 6’s exceptional efficiency comes from one of the lowest drag coefficients (Cd 0.208) of any production vehicle, which directly translates to highway range closer to EPA than most EVs achieve.

How Home Charging Cost Compares to Gas Station Fill-Ups

Most people understand that electricity costs less per mile than gas. Fewer people have done the actual math for their specific situation. Here’s a simple comparison: a 28 MPG gas car at $3.45 per gallon costs $0.123 per mile. An EV getting 3.5 miles per kWh at $0.16 per kWh costs $0.046 per mile. That’s 63% cheaper per mile. On a 15,000-mile year, the EV spends $690 on fuel versus $1,848 in gas — a $1,158 annual saving, just on energy.

The common mistake is assuming public DC fast charging is similarly cheap. At $0.40 per kWh, the same EV costs $0.114 per mile — barely cheaper than gas. If you rely heavily on public charging without home access, the fuel cost advantage nearly disappears. This is why access to home Level 2 charging is the most important financial factor in EV ownership.

EV vs Gas: Total Annual Savings Beyond Fuel

Fuel is the most visible saving, but maintenance is nearly as significant. No oil changes ($150 to $400 per year for a gas car), fewer brake replacements due to regenerative braking capturing most deceleration energy, no transmission service, no exhaust system, no spark plugs, no belts or hoses. AAA 2025 data shows EV maintenance averaging $1,218 per year versus $1,656 for gas — a $438 annual difference. Combined with $1,158 in fuel savings, a typical driver saves $1,596 per year switching from an average gas car to an equivalent EV. Over 10 years, that’s $15,960 before accounting for the federal tax credit.