How much does a journey cost per mile in fuel?

A typical 40 MPG petrol car at around 151p per litre costs roughly 17p per mile in fuel. A 50 MPG diesel at 165p per litre is about 15p per mile. Your exact figure depends on your car's real-world MPG and today's local prices.

Is this journey cost calculator free?

Completely free — no account needed. Prices come from the UK Government Fuel Finder scheme and update every 15 minutes.

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Journey Cost Calculator

Plan a route, work out fuel costs and find the cheapest fuel stops

At today's UK average petrol price (160.9p/litre, 3 August 2026), a 100-mile journey in a typical 40 mpg car costs about £18.29 in fuel — and choosing the cheapest forecourt en route usually saves £1–£2 more. Live averages: today's prices.

Route

From

Return journey

Vehicle & Fuel

Vehicle

MPG

Tank Size (L)

Fuel Type

Current Fuel Level

100%

Plan Your Fuel Stops

Route Summary One way

Miles

Duration

Est. Cost

Route Breakdown

Fuel consumed --

Fuel to purchase --

Fuel savings (vs. avg en route) --

Fuel at arrival

~25L remaining

Stations Along Route

How do I work out the fuel cost for a journey?

Divide the miles by your car's MPG, multiply by 4.546 for litres, then by the price per litre — or just enter your route above and this free calculator does it automatically with live UK prices. A typical 40 MPG petrol car costs roughly 17p per mile in fuel right now; a 50 MPG diesel about 15p per mile.

Can I find cheap fuel stops along my route?

Yes — the planner shows live prices at stations along your route so you can skip motorway services, which typically charge 15–30p per litre more. It's completely free; prices come from the UK Government Fuel Finder scheme and update every 15 minutes.