Fuel cost calculator UK

Enter two UK postcodes, areas or fuel stations to calculate road distance, fuel used and journey cost. Use the app when you want live fuel stops, saved vehicles, alerts, saving estimates and journey saving checks.

Your route

Enter the journey start and destination to calculate road mileage.

Start postcode, area or station

Destination postcode, area or station

Full postcodes give the most precise estimate.

Fuel type

Fuel economy (UK MPG)

UK MPG

Advanced options

Enter one-way distance manuallyUse this if you already know the road distance Return journeyDouble the one-way distanceSplit the costShow a cost per passenger

Commute days per week

days

Vehicle and price options

Fine-tune the economy unit and station price assumptions.

Cheaper station comparison

Edit the lower price, fill size and extra distance.

Your journey estimateEnter route

Fuel used--

Journey cost--

Return cost--

Cost per mile--

Monthly commute--

Enter a route--after the extra drive

Enter a start and destination to estimate the saving.

View assumptions

Difference per litreNot compared

Gross price saving--

Detour fuel cost--

Idling allowance--

Optional time cost--

Estimated saving after time cost--

Maximum extra miles before the saving disappearsNot compared

Results update as you type.

Install the app for real journey saving estimatesInstall Route & Fuel to turn this estimate into a real stop decision: live prices, extra miles, traffic checks, station map, saved vehicles, Google Maps handoff and fill-up history.

Compare real stations against your route, extra driving and live traffic
Save vehicles, MPG, fuel type, tank size and preferences
Link journeys and fill-ups to track real savings, best fills and worst fills over time
Use favourites, price alerts, station details, offline cached prices, dark mode and saved settings on your phone
Open your chosen station in Google Maps when you are ready

How this fuel cost calculator works

Quick maths on the website. Smarter stop decisions in the app.

Enter your start and destination, fuel type, MPG and expected station price. The website estimates road distance, litres used, one-way cost, return cost and cost per person. For live fuel savings for your route, saving estimate, saved vehicles, alerts and real fuel-stop choices, install Route & Fuel.

Try route planner

Take the estimate into the app

Check the real fuel stop before you commit.

The website gives you the quick maths. Route & Fuel in the app checks real stations against your route, live traffic, saved vehicle, fuel type and fuel remaining, then lets you save the journey and fill-up so you can track costs and savings over time.

How savings are calculated

Live traffic See whether the cheaper stop still wins once traffic is included.

Real stations Compare actual fuel stops on and near the route, not just a price gap.

Saved vehicle Reuse your MPG, fuel type, tank size and premium RON preference.

saving estimate See the estimated saving before you fill, then log the fill-up to track the real result.

Journey history Save journeys and fill-ups to review spend, litres and estimated savings.