Fuel Consumption & Trip Cost Calculator

Calculate actual fuel consumption, fuel required for a route, and trip cost with metric units and distinct US/UK MPG support.

Calculation parameters

Distance

Fuel used

Fuel price (optional) Price unit

Currency Currency is display metadata only. No currency conversion is performed.

Distance

Average fuel economy

Fuel price (optional) Price unit

Currency Currency is display metadata only. No currency conversion is performed.

Round tripDistance, fuel required, and cost are doubled exactly once.

Result

Fuel consumption

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Actual consumption: fuel ÷ distance × 100Values are normalized to litres and kilometres before calculation.

Trip fuel: distance × L/100 km ÷ 100For a round trip, distance is multiplied by 2 exactly once.

How to calculate fuel consumption correctly

Actual consumption uses the distance really travelled and fuel really used. For trip planning, the calculator converts the entered economy to L/100 km, calculates fuel required, and adds cost when a fuel price is supplied.

For example, 37.5 L over 500 km:

37.5 ÷ 500 × 100 = 7.5 L/100 km

At 60 currency units per litre, that is 2250 units for 500 km.

Examples 500 km at 7.5 L/100 km = 37.5 L of fuel30 MPG (US) ≈ 7.840 L/100 km40 MPG (UK) ≈ 7.062 L/100 kmA 500 km route as a round trip = 1000 km effective distance

What is the difference between MPG (US) and MPG (UK)?

US and Imperial gallons are different sizes: a US gallon is about 3.785 L and an Imperial gallon about 4.546 L. The same numeric MPG therefore represents different fuel consumption.

How can I measure actual fuel consumption accurately?

A practical method is full-to-full: fill the tank, drive a measured distance, refill to the same level, and use the actual refill volume in the calculation.

Can I leave fuel price blank?

Yes. Physical fuel results are still calculated. A zero fuel price is also valid and produces zero monetary cost.

Does the calculator add fixed adjustments for winter, air conditioning, traffic or payload?

No. Universal fixed percentage adjustments are not used. Real consumption varies with conditions, so enter an economy value representative of your trip.

Articles and explanations

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FUEL & TRIPS

How to Calculate Fuel Consumption and Trip Cost Fuel consumption describes how much fuel a vehicle uses to cover a given distance. In metric markets it is commonly expressed as litres per 100 kilometres (L/100 km), while specifications and travel information may also use km/L or MPG. A related practical question is how much fuel a planned route will require and what that fuel will cost at a given price. That is a planning calculation: trip distance is combined with the vehicle's average fuel economy, then required fuel is combined with the price per litre or gallon. This guide covers both tasks: measuring actual consumption from real distan..

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