Gasoline
Distance and fuel economy determine gallons or litres needed. That quantity is multiplied by the entered price per US gallon or litre.
Fuel Cost Calculator
Estimate gasoline or EV energy use and driving cost with US or Canadian units. Enter the complete distance, vehicle efficiency, and a local fuel or electricity price.
Quick answer: US gas cost is miles ÷ MPG × price per US gallon. Canada gas cost is kilometres × L/100 km ÷ 100 × price per litre. EV cost uses the selected region’s kWh efficiency unit and your electricity rate.
⛽ Calculate Driving Energy Cost
Enter the complete distance you want priced. Values are not converted when the region changes, so inputs reset on a region switch.
Enter your trip details
Estimated energy use and cost will appear here.
⚠️ Planning estimate disclaimer
This calculator provides an energy-cost estimate for general planning. Actual consumption and prices can vary with the vehicle, route, weather, driving conditions, fees, and charging losses. It is not a live-price or route-planning service.
🧭 What Do You Need Before Calculating Fuel Cost?
The calculator uses values you supply; it does not retrieve a route, vehicle specification, or live energy price.
| Vehicle mode | Required information | Typical source | Result produced |
|---|---|---|---|
| US gasoline | Total miles, MPG, USD per US gallon | Route planner or odometer; dashboard or vehicle rating; local station price | Gallons, energy cost, and cost per mile |
| Canada gasoline | Total kilometres, L/100 km, CAD per litre | Route planner or odometer; dashboard or vehicle rating; local station price | Litres, energy cost, and cost per kilometre |
| US electric vehicle | Total miles, kWh/mile, USD per kWh | Route planner or odometer; dashboard or recent charging record; chosen charging rate | kWh, energy cost, and cost per mile |
| Canada electric vehicle | Total kilometres, kWh/100 km, CAD per kWh | Route planner or odometer; dashboard or recent charging record; chosen charging rate | kWh, energy cost, and cost per kilometre |
📘 How It Works
The calculator first derives fuel or electricity use from the entered distance and efficiency. It then multiplies that quantity by the user-entered price. Full precision is kept during calculation; rounding is applied only when results are displayed.
US gas: gallons = miles ÷ MPG; cost = gallons × USD/gallon.
Canada gas: litres = km × L/100 km ÷ 100; cost = litres × CAD/litre.
US EV: kWh = miles × kWh/mile; cost = kWh × USD/kWh.
Canada EV: kWh = km × kWh/100 km ÷ 100; cost = kWh × CAD/kWh.
Per-distance cost: total cost ÷ entered distance.
🎯 When to Use
- ⛽ Estimate gasoline cost before a drive.
- ⚡ Estimate home or public EV charging energy cost.
- 📊 Compare cost per mile or kilometre using your own rates.
- 🛣️ Budget for a commute or a known road-trip distance.
- 💵 Test how a different efficiency or energy price changes cost.
🔁 Fuel Economy Units Are Not Interchangeable
MPG measures distance travelled per US gallon, so a higher MPG usually means better fuel economy. L/100 km measures fuel consumed over 100 kilometres, so a lower L/100 km usually means better fuel economy.
For example, a 300-mile trip at 30 MPG uses 10 US gallons. In Canada mode, a 500 km trip at 8 L/100 km uses 40 litres. The calculator uses the unit shown and does not convert between these inputs.
↔️ One-Way vs Round-Trip Planning
There is no round-trip switch. Enter exactly the total distance you want priced: a one-way commute needs its one-way distance, while a return journey needs outbound and return distance combined.
The same rule applies to a weekend road trip with several legs. Add every planned driving segment before entering the total because distance is a direct multiplier in the energy calculation.
⛽ Gas vs ⚡ EV Cost Logic
Electric vehicle
Distance and energy consumption determine kWh needed. That quantity is multiplied by the entered electricity price per kWh.
The structure is similar, but the consumption units are different. The result compares neither total ownership cost nor environmental impact, and it does not assume that either vehicle type is cheaper.
🌦️ Why Real Energy Cost Can Differ
Automatic: The production formula automatically handles only the entered distance, efficiency, energy price, selected vehicle mode, and regional unit convention.
Not automatic: It does not automatically adjust for traffic, idling, cold weather, heating or air conditioning, elevation, towing, cargo, tire pressure, driving speed, vehicle condition, or charging losses. These factors may already influence a real-world efficiency number, but they are not separate model inputs.
🧾 Trip Energy Cost Is Not Total Driving Cost
The result covers gasoline or electricity expense derived from the entered values. It excludes tolls, parking, depreciation, maintenance, insurance, vehicle rental, charging-network or idle fees not included in the entered rate, meals, and lodging. Add those separately when building a complete travel budget.
📊 Choosing a Useful Efficiency Number
A recent dashboard average or a measured fuel-and-distance record may better reflect your vehicle, route, season, and driving style than a laboratory or official rating.
If an official rating is the only value available, it can still support an initial planning estimate. Because efficiency directly controls calculated consumption, use a value from conditions similar to the planned trip when possible.
🧮 Three Production Calculation Examples
All three examples call the same calculation function as the interactive calculator and retain full precision until display formatting.
US gasoline road trip
300 miles · 30 MPG · USD 3.50/US gal
- Energy needed
- 10.00 gallons
- Estimated energy cost
- $35.00
- Planning interpretation
- This prices the energy for the entered 300-mile total. Tolls, parking, meals, and other travel costs remain separate.
Canada gasoline trip
500 km · 8 L/100 km · CAD 1.70/L
- Energy needed
- 40.00 litres
- Estimated energy cost
- CA$68.00
- Planning interpretation
- The consumption direction matters: a lower L/100 km input would reduce estimated litres and cost for the same distance and price.
Canada EV trip
300 km · 18 kWh/100 km · CAD 0.15/kWh
- Energy needed
- 54.00 kWh
- Estimated energy cost
- CA$8.10
- Planning interpretation
- This estimates driving energy at the entered rate. Charging loss and network fees are included only if already reflected in that rate or efficiency input.
📋 Assumptions and Cost Rules
- Fuel and electricity prices are entered by the user; no live pricing is fetched.
- US gasoline efficiency uses miles per US gallon, not Imperial MPG.
- Canada gasoline efficiency uses litres per 100 kilometres; the calculator does not convert MPG to L/100 km.
- US EV efficiency is kWh per mile, while Canada EV efficiency is kWh per 100 km.
- No currency conversion is performed. US and Canada inputs are independent.
- The entered distance is used once. For a round trip, enter the combined outbound and return distance.
- Charging losses are not added automatically. Taxes and fees are included only when already reflected in the entered price.
- Traffic, weather, terrain, speed, load, and vehicle condition can change actual consumption.
❓ Fuel Cost Calculator FAQ
What information do I need to estimate fuel cost?
Enter the complete distance, the vehicle's efficiency in the unit shown, and your fuel or electricity price. The calculator does not fetch a route, vehicle rating, or live price for you.
How do MPG and L/100 km differ?
MPG measures distance per gallon, so a higher number usually means less fuel use. L/100 km measures litres consumed over 100 kilometres, so a lower number usually means less fuel use. Do not compare the raw numbers as though they run in the same direction.
Does the calculator support electric vehicles?
Yes. US EV mode accepts kWh per mile, while Canada EV mode accepts kWh per 100 km. Both multiply estimated energy use by the entered electricity rate.
Should I enter one-way distance or the total trip distance?
Enter the distance you want priced. For a return journey, include both outbound and return travel in the entered total because the calculator does not apply a round-trip multiplier.
Why can actual energy use differ from the estimate?
Traffic, speed, hills, temperature, tire pressure, cargo, HVAC use, and driving style can change real-world consumption.
Does the estimate include tolls and parking?
No. It estimates gasoline or electricity expense only. Tolls, parking, maintenance, depreciation, insurance, rentals, meals, and lodging remain outside the result.
Should I use rated or real-world fuel economy?
A recent dashboard or measured average often reflects your vehicle and driving conditions more closely. An official rating can still be useful for initial planning when no real-world average is available.
Does traffic affect fuel or electricity cost?
Traffic can change real consumption through idling and repeated acceleration, but the calculator does not model traffic automatically. Use an efficiency value that reflects similar driving when possible.
✅ Calculation Scope and Review
Reviewed against the production calculation logic on August 22, 2026. Fixed-case checks covered US MPG and price-per-gallon math, Canadian L/100 km and price-per-litre math, both EV efficiency units, decimals, zero-priced energy, invalid divisors, and derived overflow.
This is an energy-cost estimator, not a route planner. It does not choose a route, calculate distance, fetch live prices, split costs between passengers, apply exchange rates, or model charging stops.