EV Road Trip Planner

The EV Road Trip Planner calculates optimal charging stops, total travel time, and trip electricity cost for any electric vehicle journey.

Anatomy of an EV Road Trip

A 270-mile drive from Los Angeles to Las Vegas is one of the most popular road trip corridors in the United States — and one of the best-served by DC fast charging infrastructure. Walking through this trip step by step reveals how an EV road trip differs from a gasoline one, and where the planning decisions actually matter.

Consider a 2024 Tesla Model 3 Long Range with a 75 kWh usable battery, an EPA-rated efficiency of 250 Wh per mile, and a peak DC fast charging rate of 250 kW. The driver departs Los Angeles at 90% SoC. The route follows I-15 northeast through Barstow and Baker, climbing through Mountain Pass before descending into Las Vegas.

Trip Phase	Distance	SoC at Start	SoC at End	Duration
Depart Los Angeles	0 mi	90%	—	0 min
Drive to Primm	~230 mi	90%	~10%	~3 hr 32 min
DC fast charge at Primm	—	10%	80%	~15 min
Drive to Las Vegas	~40 mi	80%	~66%	~37 min
Arrive Las Vegas	270 mi total	—	~66%	~4 hr 24 min total

The critical decision point is where to stop. Primm, Nevada hosts multiple DC fast chargers and sits roughly 230 miles into the journey. By that point the battery has dropped to around 10% SoC, which is low enough to take advantage of the fastest portion of the charging curve. The 15-minute stop from 10% to 80% adds enough energy to complete the final 40 miles with substantial margin. A gasoline car would make this drive without stopping, but the total time difference is often under 30 minutes. To estimate real-world range under your conditions, factor in your specific vehicle, speed, and climate before choosing stop locations.

Why 80% Is the Magic Number

Every battery-electric vehicle charges faster between 10% and 80% SoC than it does above 80%. This behaviour stems from the electrochemistry of lithium-ion cells: as the battery fills, the BMS must slow the flow of current to prevent overheating and lithium plating on the anode. The relationship between SoC and charge speed is called the charging curve, and it dictates road trip strategy more than any other single variable.

The following table illustrates the time penalty for charging beyond 80% on a DC fast charger, using a vehicle with a 250 kW peak charge rate and a 75 kWh usable battery.

Charging Session	Energy Added	Time Required	Average Power
10% to 80%	~52.5 kWh	~15 min	~158 kW
80% to 90%	~7.5 kWh	~9 min	~50 kW
90% to 100%	~7.5 kWh	~18 min	~25 kW
10% to 100% (full session)	~67.5 kWh	~42 min	~96 kW

Charging from 10% to 80% takes roughly 15 minutes at an average rate of 158 kW. Continuing from 80% to 100% nearly doubles the session time while adding only 22% more energy. On a road trip, two short stops (each to 80%) are almost always faster than one long stop (to 100%). For a detailed breakdown of session timing, see how long each charging session actually takes.

Factors That Change Your Trip Plan

Rated range is a laboratory number. Real-world range on a road trip depends on variables that can shift the total by 20% to 40% in either direction. The planner accounts for three primary modifiers: ambient temperature, cruising speed, and vehicle-specific efficiency.

Temperature has a pronounced effect on battery performance and cabin energy demand. The following adjustments reflect observed range reductions documented by the AAA and Recurrent Auto.

• Above 95°F: Battery thermal management and air conditioning draw roughly 5–10% of battery capacity.
• 40–95°F: Optimal operating window with minimal climate-related penalty.
• 20–40°F: Cabin heating and reduced battery efficiency cut range by 15–25%.
• Below 20°F: Range reductions of 25–40% are common.

For drivers planning winter trips that require more frequent charging stops, the planner applies a temperature correction factor. Speed is the other major variable — moving from 65 mph to 80 mph increases consumption by 25–35%, potentially adding a charging stop to a long trip.

Vehicle efficiency varies substantially across models. A compact sedan like the Tesla Model 3 consumes roughly 250 Wh/mi at highway speed, while a Ford F-150 Lightning consumes 480–520 Wh/mi. Vehicles with older batteries with reduced capacity need more stops as well. Anyone towing adds charge stops to any road trip due to the substantial increase in drag and rolling resistance.

Worked Example: LA to Vegas — Tesla Model 3 Long Range

A driver departs Los Angeles at 90% SoC (75 kWh battery, 250 Wh/mi rated). The trip is 270 miles on I-15, 95°F, cruising at 65 mph. Temperature and speed penalties increase consumption to approximately 278 Wh/mi.

At 278 Wh/mi, the 90% starting charge provides roughly 243 miles of range. One charging stop is required at Primm (230 miles in). The 10-to-80% charge takes about 15 minutes. Electricity cost at $0.43/kWh: approximately $25. Gas equivalent: 270 ÷ 30 × $4.50 = $40.50. Total trip time: approximately 4 hours 24 minutes including the charge stop.

For trips under 300 miles in a long-range EV, one quick DC fast charge stop is typically sufficient. Departing at 90% rather than 100% saves charging time at home.

Worked Example: NYC to DC — VW ID.4 Pro S

A driver departs New York at 85% SoC (77 kWh battery, 310 Wh/mi rated). The trip is 225 miles on I-95, 55°F, cruising at 60 mph. Moderate conditions keep consumption near 342 Wh/mi.

At 342 Wh/mi, the 85% starting charge provides roughly 191 miles. One stop is needed near Delaware (180 miles in). A 5-to-80% charge at 170 kW takes about 22 minutes. Electricity cost at $0.40/kWh: approximately $25.67. Gas equivalent: 225 ÷ 28 × $3.60 = $28.93. Total trip time: approximately 4 hours 7 minutes.

Even with an SUV in cooler weather, the NYC-to-DC trip needs only one brief stop. On DC fast charging, the EV fuel savings are slim — the advantage shows when you compare home versus public charging costs for daily driving.

DC Fast Charging Cost vs Gasoline

Public DC fast charging is the most expensive way to charge an EV, yet it still undercuts gasoline in most scenarios for efficient vehicles.

Fuel Type	Unit Cost	Vehicle Efficiency	Cost per Mile
DC fast (Model 3)	$0.48/kWh	270 Wh/mi	13.0¢/mi
DC fast (ID.4)	$0.48/kWh	300 Wh/mi	14.4¢/mi
DC fast (F-150 Lightning)	$0.48/kWh	500 Wh/mi	24.0¢/mi
Gas (Camry, 32 mpg)	$4.13/gal	32 mi/gal	12.9¢/mi
Gas (CR-V, 28 mpg)	$4.13/gal	28 mi/gal	14.8¢/mi
Gas (F-150, 22 mpg)	$4.13/gal	22 mi/gal	18.8¢/mi

For efficient sedans, DC fast charging at $0.48/kWh roughly matches gasoline at $4.13/gal per mile. For larger vehicles like trucks, DC fast charging can actually cost more per mile than gasoline. The EV advantage becomes decisive when charging at home ($0.13/kWh drops the cost to about 3.5¢/mi). For a deeper analysis, see the overall EV versus gas cost comparison.

Charging Curve

The charging curve describes the relationship between a battery's current state of charge and the maximum power it can accept. Most lithium-ion batteries accept full power between 10% and 50% SoC, begin tapering between 50% and 80%, and slow dramatically above 80%. The shape varies by vehicle and battery chemistry — some vehicles like the Hyundai Ioniq 5 maintain high power longer, while others begin tapering earlier.

State of Charge

SoC is the percentage of a battery's usable capacity that currently holds energy, analogous to a fuel gauge reading. Most manufacturers recommend keeping SoC between 20% and 80% for daily driving to minimise long-term degradation, though road trips routinely involve dropping to 10% at charging stops to maximise the time spent in the fast-charging portion of the curve.

DC Fast Charging Network

A network of high-power charging stations (typically 50–350 kW) installed along highway corridors, designed for rapid mid-journey charging. Major networks include Tesla Supercharger (now open to non-Tesla vehicles), Electrify America, ChargePoint, and EVgo. Station spacing of 50–100 miles on major routes enables most modern EVs to complete long-distance trips with stops of 15–30 minutes each.

Start by entering your vehicle, route distance, and conditions into the planner above. For trips where range margins are tight, cross-check your expected range with the real-world range estimator before departure, and keep a backup charger location in mind for segments where elevation or headwinds might increase consumption. For the full pre-departure checklist, the nine-phase road trip planning playbook covers everything from real-world range estimation through cold-weather adjustments and handling the unexpected.