How do I compare the fuel cost of two vehicles?

Enter the same trip, weekly, monthly, or annual distance for both vehicles. Add each vehicle's real fuel efficiency and its fuel price per litre. The calculator compares litres used, total fuel cost, cost per kilometre, and the difference.

Can the two vehicles use different fuel prices?

Yes. Each vehicle has its own price input, so you can compare vehicles that use different grades or locally priced fuels. The result still covers fuel expense only; it does not model differences in maintenance or purchase price.

Should I use km/L or L/100 km?

Use the unit shown by your vehicle or mileage records. Higher km/L is better, while lower L/100 km is better. The calculator applies the appropriate formula when you switch units.

What fuel efficiency should I enter?

Use an average measured over several refills in conditions similar to your normal driving. Advertised test figures may differ from real consumption because of traffic, load, speed, weather, tyre pressure, and driving style.

Does this compare total vehicle ownership cost?

No. It compares fuel running cost only. Purchase price, financing, insurance, taxes, depreciation, servicing, repairs, tyres, parking, tolls, and resale value are not included.

Can I compare a petrol vehicle with a diesel vehicle?

You can compare fuel-volume expense when both efficiencies are expressed in km/L or L/100 km and both prices are entered per litre. A dedicated fuel-type comparison should also consider differences such as energy type and should not be confused with this simple fuel-cost comparison.

Why could my actual saving be different?

Distance, fuel price, and efficiency can change. Congestion, idling, short trips, towing, payload, road gradient, weather, air conditioning, and vehicle condition may affect one vehicle differently from the other.

Running-cost comparison

Vehicle Fuel Cost Comparison Calculator

Compare two vehicles over the same distance using real fuel economy and local prices. See fuel required, total expense, cost per kilometre, and the difference without mixing in unsupported ownership-cost assumptions.

Bike, scooter, car, or truck
140+ currencies preset
Privacy-first

Calculate Your Vehicle Fuel Cost Comparison

Fuel-only running cost for the same distance

Distance per monthPeriodCurrency code

Fuel economy unit

Vehicle A

Vehicle nameFuel efficiency (km/L)Fuel price per litre

Vehicle B

Vehicle nameFuel efficiency (km/L)Fuel price per litre

Enter values greater than zero for distance, efficiency, and both fuel prices.

Formula and example

How the Vehicle Fuel Cost Comparison Calculator Works

Litres used equals distance divided by km/L, or distance multiplied by L/100 km divided by 100. Fuel cost equals litres used multiplied by price per litre. The calculator retains full precision and rounds only the displayed figures.

Comparison formula

Cost = (Distance ÷ Efficiency) × Price

For example, 1,000 km per month. Vehicle A returns 12 km/L; Vehicle B returns 16 km/L. Enter each vehicle's local fuel price.

Vehicle A fuel

1,000 ÷ 12

83.33 L

Vehicle B fuel

1,000 ÷ 16

62.5 L

Difference

higher − lower

Your saving

Illustrative reference

Vehicle Comparison Mileage Calculator Example

Compare typical economy ranges side by side with the fuel and petrol cost each produces. Enter measured mileage for a fairer comparison between your own vehicles.

Currency

Detecting your currency — pick one manually if you prefer.

Petrol price per litre

per litre

Use the current pump price in your currency. It is not fetched automatically.

Vehicle

km/L

Vehicle	Fuel economy	Fuel / day	Cost / day	Cost / month
Light commuter bike	55–65	0.50 L	—	—
Standard commuter bike	45–50	0.63 L	—	—
Mid-size commuter bike	45–50	0.63 L	—	—
Sport commuter bike	40–45	0.71 L	—	—
Larger commuter bike	38–42	0.75 L	—	—
Light city scooter	50–55	0.57 L	—	—
Comfort scooter	42–48	0.67 L	—	—
Urban scooter	48–52	0.60 L	—	—
Compact hatchback	18–22	1.50 L	—	—
Small family car	14–17	1.94 L	—	—
Mid-size sedan	12–15	2.22 L	—	—
Compact sedan	13–16	2.07 L	—	—
Large sedan	11–13	2.50 L	—	—
Large SUV	8–10	3.33 L	—	—
Pickup truck	9–12	2.86 L	—	—
Compact SUV	12–14	2.31 L	—	—

Based on a 30 km trip using the midpoint of each economy range. Add a petrol price to see daily and monthly cost.

How to use it

Calculate Vehicle Fuel Cost Comparison

Enter the distance both vehicles will cover during a trip, week, month, or year. Choose km/L or L/100 km and enter each vehicle's observed efficiency. Enter the price per litre for each vehicle and label the currency.

For a fair comparison, use the same distance and similarly representative mileage data. Different fuel prices are supported, but both price inputs must be per litre.

01Use case

Same distance

Enter one shared distance so both vehicles are judged on equal terms.

02Use case

Real efficiency

Use observed averages from several refills, not advertised figures.

03Use case

Price each fuel

Enter each vehicle's own price per litre in the same currency.

Comparison guide

Vehicle Fuel Cost Comparison Guide

Enter representative efficiency for a fair comparison, keep fuel running cost separate from ownership cost, and pick the right calculator for each question.

Use real-world efficiency for a fair comparison

Fuel economy, fuel efficiency, mileage, and consumption describe how much distance a vehicle covers for its fuel or how much fuel it uses over a distance. Use averages measured across several tank refills where possible. Compare similar city, highway, mixed-route, payload, passenger, towing, and climate conditions.

Engine size, vehicle weight, aerodynamics, transmission, drivetrain, tyre pressure, congestion, idling, speed, acceleration, braking, roof racks, cargo, air conditioning, maintenance, and road gradient can change real consumption. If two vehicles serve different duties, calculate representative scenarios separately.

Fuel running cost is not total ownership cost

This tool answers a narrow question: how do two vehicles' fuel expenses compare over the same distance? It deliberately excludes acquisition and ownership assumptions that cannot be inferred reliably from fuel efficiency.

Add purchase price, loan interest, depreciation, registration, insurance, servicing, repairs, tyres, tolls, parking, and downtime separately when making a buying or fleet decision. An apparently efficient vehicle may not have the lowest total cost of ownership, while a higher purchase price cannot be justified by fuel saving alone without calculating the payback period from verified costs.

When to use a different calculator

Use this page to compare any two vehicles' fuel running cost. For a single journey, use the trip petrol calculator. For one car's expense, use the car petrol calculator. A petrol-versus-diesel, petrol-versus-CNG, or petrol-versus-electric comparison has distinct fuel-type assumptions and should use a dedicated comparison rather than treating litres and electricity units as equivalent.

This separation prevents the vehicle comparison page from competing with specific fuel-type comparison pages. Its primary entities are vehicle, distance, fuel economy, fuel consumption, price per litre, litres used, cost per kilometre, running cost, and cost difference.

Methodology, Accuracy and Assumptions

The estimate assumes both vehicles cover the entered distance, each efficiency value remains representative, and each price is entered per litre in the same currency. The period selector labels the scenario; it does not convert a daily distance into a monthly figure.

Results are estimates and do not predict future fuel prices or changes in traffic, routes, load, weather, vehicle condition, or driving behaviour. The tool does not convert currencies, gallons, miles, electricity, CNG mass, or diesel-specific energy values.

The comparison applies the visible arithmetic directly to your inputs and keeps unrounded intermediate values. It does not fetch fuel prices or vehicle specifications, so you remain in control of the data used.

Review the petrol expense formula guide and shared calculation methodology for more detail. Last reviewed: 17 September 2026.

FAQ

Vehicle Comparison Questions

Answers about fuel economy, cost per kilometre, fair inputs, and what the comparison excludes.

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