How to Calculate EV Trip Costs — Electric Vehicle Cost Guide

Electric vehicles are cheaper to run than gas cars. Everyone knows that. But when someone asks "so what did that road trip actually cost in electricity?" most EV owners have no idea. The dashboard shows range and efficiency, not dollars. And when you're splitting trip costs with passengers, "trust me, it was basically free" doesn't really cut it.

This guide breaks down exactly how to calculate the real cost of any EV trip. We'll cover electricity rates across North America, efficiency ratings for popular vehicles, the significant difference between home and public charging costs, how cold weather changes everything, and how to fairly split those costs when you're driving other people.

THE EV TRIP COST FORMULA

The core formula for calculating electric vehicle trip costs is the same structure as the gas formula, just with different units:

Three variables. That's all you need. Distance is how far you're driving in kilometres. Efficiency is how many kilowatt-hours your car uses to travel 100 km. Electricity rate is what you pay per kWh, whether that's your home rate or a public charger's price.

In miles, the formula adapts slightly. You'd use kWh/100mi or, if your car reports efficiency in mi/kWh, divide your distance by that number to get total kWh consumed, then multiply by your rate. We'll stick with metric for the main examples and include imperial conversions where they matter.

ELECTRICITY RATES ACROSS NORTH AMERICA

The single biggest variable in EV trip costs is what you pay for electricity. Unlike gas, where the price is posted on a giant sign at every station, electricity rates are buried in utility bills, vary by time of day, and differ wildly between home charging and public fast charging.

HOME CHARGING RATES BY PROVINCE (CANADA)

If you charge at home overnight, you're paying your residential utility rate. Here's what that looks like across Canada as of early 2026:

• Quebec: $0.07-$0.08/kWh — the cheapest in North America thanks to abundant hydroelectric power. EV ownership here is practically subsidized by geography.
• British Columbia: $0.10-$0.12/kWh — BC Hydro's tiered rate means the first 1,350 kWh per billing period is cheaper. If you're charging an EV, you'll likely hit the second tier.
• Manitoba: $0.10/kWh — another hydro province with very low rates.
• Ontario: $0.08-$0.17/kWh — time-of-use pricing means overnight charging (off-peak) is dramatically cheaper than daytime. Always charge off-peak.
• Alberta: $0.12-$0.20/kWh — deregulated market means rates fluctuate month to month. Check your latest bill.
• Nova Scotia: $0.17-$0.19/kWh — among the highest in Canada due to reliance on imported natural gas and coal generation.

HOME CHARGING RATES BY STATE (US)

• Washington State: $0.10-$0.11/kWh — hydro power keeps costs low in the Pacific Northwest.
• Texas: $0.12-$0.14/kWh — deregulated, so shop around for plans. Some offer free overnight electricity specifically for EV charging.
• California: $0.25-$0.45/kWh — the most expensive in the continental US. Time-of-use plans are essential. Charging during super off-peak (midnight to 6 AM) can cut your rate in half.
• New York: $0.20-$0.24/kWh — varies significantly between upstate (cheaper, hydro) and downstate (more expensive, ConEd territory).
• Florida: $0.13-$0.15/kWh — moderate rates with little seasonal variation.
• National average (US): $0.16/kWh — a reasonable default if you don't know your exact rate.

PUBLIC CHARGING RATES

Public charging is a completely different cost structure, and this is where many people underestimate EV trip expenses. There are three tiers:

• Level 2 (destination charging): $0.15-$0.30/kWh — found at hotels, shopping centres, and workplaces. Some are free. Adds about 30-40 km of range per hour of charging.
• DC Fast Charging (CCS/NACS): $0.35-$0.60/kWh — the highway charging option. Networks like Electrify Canada, Petro-Canada, FLO, and ChargePoint. Adds 250+ km of range in 20-30 minutes.
• Tesla Supercharger: $0.35-$0.55/kWh — now open to non-Tesla vehicles in most locations. Tesla owners with certain plans may get lower rates.

The critical thing to understand is that DC fast charging on a road trip typically costs 3-4x more per kWh than home charging. This closes the gap with gas significantly. An EV road trip relying entirely on fast chargers can cost 40-60% of what the same trip would cost in a gas car, rather than the 80-90% savings you'd see charging at home.

EV EFFICIENCY RATINGS

Your car's efficiency determines how many kWh it consumes per 100 km. This varies enormously between vehicles, and understanding your specific car's real-world efficiency is essential for accurate cost calculations.

POPULAR EVS AND THEIR EFFICIENCY

• Tesla Model 3 (Standard Range Plus): 14.0-15.5 kWh/100km — one of the most efficient EVs on the road. Aerodynamic design and relatively light weight keep consumption low.
• Tesla Model Y (Long Range): 16.0-17.5 kWh/100km — slightly less efficient than the Model 3 due to the taller SUV body creating more drag.
• Hyundai Ioniq 5 (Long Range AWD): 18.5-20.0 kWh/100km — the AWD system adds consumption. The RWD version is closer to 16.5 kWh/100km.
• Hyundai Ioniq 6: 14.0-15.0 kWh/100km — sedan aerodynamics make this one of the most efficient EVs you can buy.
• Kia EV6 (Long Range RWD): 16.8-18.0 kWh/100km — shares its platform with the Ioniq 5 but slightly different tuning.
• Ford Mustang Mach-E (Standard Range): 18.0-20.0 kWh/100km — heavier build and less aerodynamic shape than sedans.
• Chevrolet Equinox EV: 17.0-19.0 kWh/100km — GM's Ultium platform offers decent efficiency for a crossover.
• Rivian R1S: 23.0-26.0 kWh/100km — a large, heavy SUV. Capable off-road but significantly less efficient than smaller EVs.
• BMW iX xDrive50: 21.0-23.0 kWh/100km — luxury weight and all-wheel drive push consumption up.
• Nissan Leaf (40 kWh): 16.0-17.5 kWh/100km — aging platform but still reasonably efficient for city driving.

WORKED EXAMPLES

Let's put the formula to work with three real scenarios that cover different vehicles, charging methods, and trip types.

EXAMPLE 1: DAILY COMMUTE IN A TESLA MODEL 3

EXAMPLE 2: ROAD TRIP IN A HYUNDAI IONIQ 5

EXAMPLE 3: LONG ROAD TRIP IN A TESLA MODEL Y

HOME VS PUBLIC CHARGING: THE REAL COST DIFFERENCE

This is the most misunderstood aspect of EV costs. When people quote "EV fuel costs are 80% less than gas," they're talking about home charging. When you're on a road trip using DC fast chargers, the picture changes substantially.

HOME CHARGING

Charging at home, especially overnight on off-peak rates, is where EVs deliver their maximum cost advantage. At Ontario's off-peak rate of $0.082/kWh, a Tesla Model 3 costs roughly $1.19 per 100 km. The equivalent gas cost for a Honda Civic is about $12.38 per 100 km. That's a 90% savings.

Level 1 charging (standard 120V outlet) adds about 6-8 km of range per hour. For most daily commuters, this is actually enough — plug in when you get home, and you have a full battery by morning. Level 2 charging (240V, like a dryer outlet) adds 35-50 km per hour, which is necessary if you drive more than 80 km per day or have a less efficient vehicle.

PUBLIC LEVEL 2

Workplace and destination chargers typically cost $0.15-$0.30/kWh, sometimes with an additional session or parking fee. At $0.25/kWh, that same Model 3 costs $3.63 per 100 km. Still much cheaper than gas, and useful for topping up during the workday or while shopping.

DC FAST CHARGING

At $0.45/kWh (a typical network rate), the Model 3 costs $6.53 per 100 km. This is roughly half the cost of gas, which is still a meaningful savings — but it's a far cry from the 90% savings you get at home. Some networks charge per-minute instead of per-kWh, which can be even more expensive for vehicles that charge slowly.

COLD WEATHER IMPACT ON EV RANGE AND COSTS

If you live anywhere that gets real winters, cold weather will significantly increase your EV's energy consumption. This isn't a minor footnote — it can change your trip cost calculations by 30-50%.

WHY COLD HURTS EV EFFICIENCY

Several factors compound in cold weather:

• Battery heating: Lithium-ion batteries need to be warm to accept and deliver charge efficiently. Your car uses energy to heat the battery pack, especially on the first part of your drive.
• Cabin heating: Gas cars get "free" heat from the engine's waste heat. EVs must use the battery to run a heat pump or resistive heater. Cabin heating can consume 2-5 kW continuously.
• Increased rolling resistance: Cold tires and cold lubricants in the drivetrain create more friction.
• Battery chemistry: Cold batteries have higher internal resistance, meaning they're less efficient at delivering power.
• Preconditioning: If you preheat the cabin and battery while plugged in, this mitigates some consumption but increases your electricity bill at home.

REAL-WORLD COLD WEATHER EFFICIENCY

Based on aggregated data from Canadian EV owners:

• +5°C to -5°C (mild cold): Expect 15-25% more energy consumption than summer. A car rated at 15 kWh/100km will use 17-19 kWh/100km.
• -5°C to -15°C (moderate cold): Expect 25-35% more consumption. That same car now uses 19-20 kWh/100km.
• -15°C to -30°C (severe cold): Expect 35-50% more consumption. Now you're at 20-23 kWh/100km. Short trips are hit hardest because the battery and cabin never fully warm up.

MITIGATING COLD WEATHER COSTS

• Precondition while plugged in. Heat the cabin and battery using grid power before you unplug. This means the energy comes from the wall, not your battery.
• Use seat heaters instead of cranking cabin heat. Heated seats use 50-75 watts per seat. The cabin heater uses 2,000-5,000 watts. You can keep the cabin at 18°C with heated seats on and save significant range.
• Park in a garage. Even an unheated garage keeps the battery 5-10°C warmer than outdoor parking, which meaningfully improves efficiency.
• Plan charging stops with cold weather range in mind. If your summer range is 400 km, budget for 260-300 km in deep winter.

SPLITTING EV COSTS BETWEEN PASSENGERS

The formula for splitting EV costs is identical to splitting gas costs: calculate the total trip energy cost, then divide by the number of people in the car. But EVs introduce a few unique complications.

THE HOME CHARGING DILEMMA

When an EV owner charges at home and drives passengers around, the electricity cost is buried in their utility bill. There's no gas station receipt to point at. This creates a common situation where the driver says "it's basically free" and absorbs the cost, or passengers assume they don't need to chip in because "it's electric."

Over months of regular carpooling, this adds up. A daily 70 km commute in a Model 3 costs roughly $18 per month in electricity at Ontario off-peak rates. If a passenger rides every day and never contributes, the driver is eating a cost that should be split.

MIXED CHARGING SCENARIOS

Road trips often involve a mix of home charging (cheap) and fast charging (expensive). The fairest approach is to calculate each segment separately:

1. Figure out what percentage of the trip's energy came from home charging vs. public charging
2. Calculate the cost for each portion at its respective rate
3. Add them together for the true total trip cost
4. Divide by the number of riders

If you want to simplify, a reasonable shortcut is to use a blended rate. For a typical road trip where you start full from home and fast-charge along the way, a blended rate of $0.25-$0.30/kWh is a fair middle ground that most passengers won't argue with.

SHOULD PASSENGERS PAY MORE FOR AN EV?

Some EV owners argue that since they paid a premium for the vehicle, passengers should pay a bit more than just the electricity cost. This is a personal choice, but our recommendation is: stick to energy costs only. The driver chose to buy an EV for their own reasons (environmental, lower total cost of ownership, performance, tax credits). Charging passengers a premium on top of electricity costs creates resentment and complicates what should be a simple split.

The exception is if you're running a formal carpool or rideshare arrangement. In that case, the CRA's per-kilometre rate ($0.72/km for the first 5,000 km in 2026) provides a reasonable all-in figure that covers electricity, depreciation, insurance, and maintenance — and it applies equally to gas and electric vehicles.

EV COST VS GAS COST: THE REAL COMPARISON

Here's a quick reference showing the per-100-km fuel cost for popular EVs vs gas equivalents, using home charging at $0.12/kWh and gas at $1.70/L:

• Tesla Model 3 (14.5 kWh/100km): $1.74/100km EV vs $11.48/100km gas (Honda Civic, 6.7 L/100km) — 85% savings
• Hyundai Ioniq 5 (19.0 kWh/100km): $2.28/100km EV vs $14.45/100km gas (Toyota RAV4, 8.5 L/100km) — 84% savings
• Tesla Model Y (16.5 kWh/100km): $1.98/100km EV vs $14.45/100km gas (Toyota RAV4, 8.5 L/100km) — 86% savings
• Rivian R1S (24.0 kWh/100km): $2.88/100km EV vs $20.40/100km gas (Jeep Grand Cherokee, 12.0 L/100km) — 86% savings

On home electricity, EVs consistently cost 80-90% less in fuel per kilometre. On DC fast chargers at $0.45/kWh, those same EVs cost $6.53, $8.55, $7.43, and $10.80 per 100 km respectively — still 25-55% cheaper than gas, but the gap narrows significantly.

TRACKING EV COSTS OVER TIME

For regular carpools, tracking each individual trip is tedious. A better approach is to set up your vehicle once with its efficiency rating and your typical electricity rate, then just log the distance for each trip. The math stays consistent and you can settle up monthly instead of after every ride.

If your electricity rate changes seasonally (common with time-of-use pricing), update your rate when your bill changes. Similarly, if you're entering winter months, adjust your efficiency number upward by 20-40% to reflect cold weather consumption. These two adjustments keep your running calculations honest without requiring you to monitor your dashboard on every single drive.

COMMON EV COST CALCULATION MISTAKES

1. Using the manufacturer's rated efficiency. Real-world efficiency is almost always worse. Use your trip computer's actual average, not what the brochure says.
2. Ignoring charging losses. When you charge a 75 kWh battery from empty to full, you'll pull about 82-90 kWh from the wall. The 10-18% difference is lost as heat during charging. For home cost calculations, this matters. Your car used 75 kWh, but you paid for 85.
3. Forgetting idle consumption. An EV sitting in extreme heat or cold uses energy to thermally manage the battery (called "vampire drain" or "sentry mode" consumption on Teslas). On long trips with overnight stops, this can add 2-8 kWh per day.
4. Using home rates for road trip calculations. If you fast-charged three times on a road trip, your actual cost per kWh is much higher than your home rate.
5. Not accounting for return trips. Same as gas cars — if you drove someone to the airport, you still have to drive home. Calculate the round trip.
6. Comparing advertised range, not cost. "My car has 500 km of range" tells you nothing about cost. Two cars with the same range can have very different efficiency ratings and therefore very different per-km costs.

QUICK REFERENCE FORMULAS

THE BOTTOM LINE

Calculating EV trip costs is straightforward once you know three numbers: your distance, your car's real-world efficiency, and your electricity rate. The challenge is that electricity rates vary wildly depending on where and how you charge, and efficiency changes with the seasons.

For daily commuting on home electricity, EVs are absurdly cheap to operate — often less than $1 per day. For road trips with fast charging, they're still meaningfully cheaper than gas, but the savings are closer to 50% than 90%. And when you're splitting those costs between passengers, the same principles apply as any other car: calculate the real cost and divide it fairly.

The hardest part is that there's no gas receipt to wave around. Electricity costs are invisible and delayed. That's why tracking your trips and settling up regularly matters even more with an EV than with a gas car.