How to Compare a Local UK Fuel Price With the National Average

Business & Money Desk 2026-10-13 09:29 3 min read

Vintage petrol pumps stand in front of a local UK garage building exterior.

A UK petrol or diesel price at a nearby forecourt can differ from the national average because the average combines prices from across the country. To make a useful comparison, match the fuel type, check the dates, and treat the Department for Energy Security and Net Zero’s weekly figure as a benchmark—not a promise of what any station charges today.

Find the latest official weekly fuel price

The Department for Energy Security and Net Zero publishes road fuel price data in its official collection. Check the latest weekly publication and note its reporting date before comparing it with a price you see locally.

Use the petrol average for petrol and the diesel average for diesel. A petrol station’s price board or pump shows a local price, usually in pence per litre; the national figure is an average across reported prices. They describe different things, even when they use the same unit. To put a local figure in context, compare nearby fuel prices with the national benchmark.

The collection provides price data and publications, but the available source information here does not specify the latest weekly figures. So no current national average is quoted in this guide. Open the collection to get the latest published values and date rather than relying on an undated figure.

Compare a forecourt price fairly

A quick comparison works best when both figures are for the same fuel and close in time. Record the local station’s displayed price and the reporting date of the national average. If the dates are far apart, the difference may reflect a change in prices since the weekly data was collected.

To calculate the gap, subtract the national average from the local price. A positive result means the local price is higher; a negative result means it is lower. For example, if a local board shows 150p per litre and the latest matching national average is 147p, the station is 3p per litre above that benchmark. These figures are an illustration, not current UK prices.

Location matters too. Prices may vary between towns and between supermarket, independent and motorway stations. Compare stations you could realistically use, and include the extra distance or time needed to reach a cheaper option. A lower pump price may not save money if the detour uses more fuel than the price difference saves.

How to Compare a Local UK Fuel Price With the National Average

Estimate the fuel cost of a trip

For a simple estimate, use the trip distance and your vehicle’s fuel efficiency. If efficiency is shown in miles per gallon, convert it to litres per mile using 4.546 litres per UK gallon. Then multiply the litres needed by the local price per litre.

Example: For a 100-mile trip in a car returning 40 miles per UK gallon, estimated fuel use is 100 ÷ 40 × 4.546, or about 11.4 litres. At an illustrative pump price of 150p per litre, the fuel would cost about £17.10. The result is an estimate; actual consumption depends on driving conditions, load, speed and the vehicle.

If your car shows miles per litre or litres per 100 kilometres, use that figure instead and keep the units consistent. For litres per 100 kilometres, convert the trip distance to kilometres, multiply by the vehicle’s consumption, then divide by 100.

What the average can and cannot tell you

A national average helps put one station’s price in context. It does not show the price at every forecourt, guarantee the price available when you arrive, or tell you which station is best for your journey. Prices can change between weekly reporting periods, and the local mix of stations affects what drivers encounter.

Before setting off, check the station’s current displayed price where possible. For a broader comparison, return to the government collection, confirm the publication date, and compare the matching petrol or diesel figure. Recheck after the next weekly release if you need a newer national benchmark.

Source: UK Department for Energy Security and Net Zero

Context & actions About this article

Source check How to compare

The government collection publishes road fuel price data; compare its dated national averages with a local price for the same fuel.

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