Enter your distance, your car's average, and fuel price — see the liters needed and total trip cost instantly.
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Quick distances
The ToolBrainy Fuel Cost Calculator works out exactly how much fuel your trip will use and what it will cost. Enter how far you are driving, your car's average fuel economy, and the current fuel price — the tool instantly shows the liters needed, the total cost, and the cost per 100 km. You can also click a quick-distance preset for common journey types and see the result update without pressing any button.
It supports every common way of expressing fuel economy: kilometers per liter (km/L), liters per 100 km (L/100km), and miles per gallon in both US and UK gallons — so you can enter your figure exactly as it appears in your car's manual or instrument cluster. The cost estimate is accurate for a consistent speed on a flat road; real-world use varies with traffic, hills, driving style, and air conditioning. A 10–15% buffer on top of the estimate is a sensible margin for city driving or stop-and-go traffic. Everything runs in your browser with no sign-up and no data sent to a server.
Reviewed by the ToolBrainy Team · Calculations run entirely in your browser · Last updated July 2026
Type the total one-way distance and choose kilometers or miles. Use the quick-distance buttons for common journey types — 30 km for a city commute, 250 km for an intercity trip, or 1,000 km for a long road trip. For a return trip, double the one-way distance before entering it.
Type your car's average fuel economy and pick the unit that matches. If your dashboard shows km/L, use that. If your car manual quotes L/100km, use that. US cars typically quote MPG (US); UK cars quote MPG (UK). You can find your car's official figure on the manufacturer's website or fuel economy databases. Your real-world average may be 10–20% lower than the official figure.
Search for your currency or scroll to find it, then type today's fuel price per liter. Check the price at a recent receipt or a local fuel price tracker. Results update instantly as you type — no button press needed.
Works with km/L, L/100km, MPG (US), and MPG (UK) — no manual conversion needed.
Liters, total cost, and cost per 100 km update live as you type — no calculate button.
Pick your currency and price per liter to see exactly what a journey will cost.
One-click presets for common trips: commute, intercity, long haul, and road trips.
Enter distance in kilometers or miles — the tool handles the conversion for you.
Runs entirely in your browser. Nothing is sent to a server. Always free.
An 800 km trip in a car averaging 14 km/L needs 57 liters. At £1.65 per liter, that is £94 in fuel each way. Knowing this before you leave lets you budget accurately and decide whether to book stops at cheaper fuel stations along the route.
A 35 km commute each way, 5 days a week = 350 km/week. At 15 km/L and Rs 280/L, that is about 23.3 liters per week — Rs 6,524 per week or roughly Rs 26,000 per month just in fuel. Seeing this total often motivates carpooling or public transport comparisons.
A 500 km group trip costs a total of Rs 9,333 in fuel. Split four ways that is Rs 2,333 per person — a quick, fair figure you can share in a group chat before anyone has to calculate anything at the pump.
Old car: 10 km/L. New car: 16 km/L. On a 500 km trip at Rs 280/L, the old car costs Rs 14,000; the new one costs Rs 8,750 — a saving of Rs 5,250. Over 20,000 km per year that gap becomes significant when weighing up a vehicle upgrade.
Enter the distance and your company car's fuel economy to see the actual fuel cost. Compare this against your employer's flat mileage rate to know whether you are being fully reimbursed — useful when negotiating reimbursement terms or filing accurate expense reports.
Calculate the total fuel cost, divide by the number of seats, and share the result with passengers. This removes awkward guesswork from carpooling arrangements and gives everyone a transparent, calculable number rather than an arbitrary flat fee.
The tool divides your trip distance by your car's average to find the liters of fuel needed, then multiplies that by the price per liter to get the total cost. For example, 250 km at 20 km/L needs 12.5 liters; at Rs 280 per liter that is Rs 3,500.
Your car average is its fuel economy — how far it travels on a set amount of fuel. If your car does 20 km on one liter, its average is 20 km/L. You can also enter it as L/100km or miles per gallon.
A US gallon is 3.785 liters while a UK (imperial) gallon is 4.546 liters. That means the same car shows a higher number in UK MPG than in US MPG. Pick the one that matches where your figure came from.
Divide 100 by the L/100km figure. For example, 6.5 L/100km equals about 15.4 km/L. This tool does it automatically — just choose the L/100km unit and enter your value.
Yes. Set the distance unit to miles and choose MPG (US) or MPG (UK) for your car average. The result is always shown in liters and your chosen currency for a consistent cost estimate.
It is a close estimate based on the numbers you enter. Real-world fuel use varies with traffic, load, driving style, terrain, and air conditioning, so treat the result as a reliable planning figure rather than an exact amount.
No. The Fuel Cost Calculator runs entirely in your web browser, so there is nothing to download or install — just open the page and enter your trip details.
Yes. The tool works in any modern mobile browser, so you can estimate a trip's fuel cost on your phone before you set off.