// calculate fuel expense for any trip in seconds
Calculate fuel cost for any trip based on distance, fuel consumption rate, and price per litre or gallon. Free, instant, browser-based.
Ready to calculate
Enter your trip details and click CalculateChoose km or miles for distance, and litres or gallons for fuel volume.
Input your total trip distance and your vehicle's fuel consumption rate.
Select your currency and enter the current price per litre or gallon at the pump.
Click Calculate to see total cost, fuel needed, and cost per kilometre/mile.
The Fuel Cost Calculator estimates how much you'll spend on petrol or diesel for any trip. Enter the distance, your vehicle's fuel efficiency, and the local fuel price — and get the total cost instantly, including a per-kilometre breakdown.
The formula is: Fuel Needed = (Distance / 100) × Consumption Rate, then Total Cost = Fuel Needed × Price per Litre. For miles/gallons, the formula adjusts to use MPG conventions.
Most petrol passenger cars average 7–10 L/100km. Hybrid vehicles typically achieve 4–6 L/100km. SUVs and trucks may use 10–15 L/100km. In MPG, typical cars achieve 25–35 MPG.
Yes. Switch the volume unit to "gal" and the calculator will use miles per gallon (MPG) convention for consumption and price per US gallon for the fuel price input.
Simply double the one-way distance for a round trip. For example, if your one-way journey is 200 km, enter 400 km to get the total return trip fuel cost.
Check your local petrol station, fuel price apps, or government fuel price monitoring websites. Prices vary by region, fuel grade (unleaded, premium, diesel), and day of the week.
The result is an estimate based on ideal driving conditions. Real-world fuel use can vary by ±20% depending on driving style, traffic, road type, air conditioning usage, tyre pressure, and load weight.
Yes — diesel costs work exactly the same way. Just enter your diesel vehicle's consumption rate (usually 5–8 L/100km) and the diesel price at the pump.
No. All calculations happen entirely in your browser. No data is sent to any server, and nothing is stored. The tool is fully client-side and private.
Planning a road trip or daily commute and wondering how much you'll spend on fuel? Our free Fuel Cost Calculator gives you an accurate estimate in seconds. Simply enter your trip distance, your vehicle's fuel efficiency rating, and the current price of petrol or diesel at your local pump — and instantly see the total fuel cost for your journey.
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The calculator uses a straightforward formula that mirrors how fuel efficiency is measured in your vehicle's manual:
For example: a 350 km trip in a car consuming 8.5 L/100km with fuel at $1.90/L would cost: (350 ÷ 100) × 8.5 × $1.90 = $56.53.
The tool supports both metric and imperial measurement systems. You can switch between kilometres and miles for distance, and between litres and US gallons for fuel volume. The fuel price input supports 10 major currencies including USD, EUR, GBP, JPY, VND, AUD, CAD, INR, BRL, and SEK — making this calculator useful for travellers worldwide.
While our calculator provides a precise mathematical estimate, real fuel consumption can differ from the official specification. Key factors include:
Use the calculator before every road trip to budget accurately. For long journeys, factor in the return trip by doubling your distance. If you're comparing two different cars for a road trip, run the calculator for each vehicle's consumption rating to see the difference in fuel spend. This is also useful for fleet managers and delivery drivers calculating per-kilometre operating costs.
The two main conventions for expressing fuel efficiency are L/100km (used in Europe, Australia, and most of Asia) and miles per gallon or MPG (used in the USA and UK). A lower L/100km number means better efficiency. A higher MPG number means better efficiency. To convert: MPG ≈ 235.21 ÷ (L/100km). Our calculator handles this conversion automatically when you switch unit modes.
Knowing your fuel cost in advance helps you plan smarter. Whether you're budgeting for a family holiday, comparing the running costs of two vehicles before buying, or tracking business travel expenses for reimbursement, a quick calculation prevents surprises at the petrol station. Many drivers underestimate fuel costs by 20–30% on longer trips — this tool helps you plan realistically.