Alternative Fuels LPG Cost

How much is LPG per litre?

Q: How much is LPG per litre?

LPG typically costs between 65p and 80p per litre at UK forecourts, roughly half the price of petrol or diesel. Because LPG is less fuel-efficient per litre, the real-world saving on fuel spend is closer to 30–40%.

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LPG (liquefied petroleum gas) typically costs between 65p and 80p per litre at UK forecourts, making it roughly half the pump price of petrol or diesel. However, because LPG engines are less fuel-efficient per litre than petrol, the real-world saving is closer to 30–40% on fuel spend.

What Does LPG Cost at the Pump?

Typical pump price: LPG prices across the UK generally sit between 65p and 80p per litre, though prices vary by region and station. Rural stations with less competition tend to charge more. 1

Lower duty rate: LPG attracts a lower rate of fuel duty than petrol or diesel under UK law, which is the primary reason it is significantly cheaper per litre at the pump. 2

Price volatility: LPG is a by-product of natural gas and oil refining, so its price can fluctuate with wholesale energy markets. Prices can shift noticeably over a few weeks.

The Real-World Cost Saving

Lower MPG on LPG: LPG has a lower energy density than petrol, so most converted vehicles return around 15–20% fewer miles per litre compared to running on petrol. The net fuel saving is typically 30–40%, not 50%.

Conversion cost: A professional LPG conversion costs £1,000–£2,500 depending on the vehicle. Drivers typically need 20,000–30,000 miles of LPG running to recoup that investment through fuel savings.

Government stance on alternative fuels: The UK government's Transport Decarbonisation Plan focuses long-term investment on electric vehicles rather than LPG, so LPG infrastructure is unlikely to expand significantly. 3

LPG vs Other Fuels on Cost

vs Petrol: Petrol currently averages around 135–145p per litre across the UK, making LPG roughly half the per-litre cost, though the real saving is reduced by lower efficiency. 1

vs Electric: Home charging an EV costs approximately 7–9p per mile at off-peak rates, which is generally cheaper than LPG for high-mileage drivers, though public charging can close that gap. 4

LPG station availability: The LPG network in the UK has shrunk considerably and now numbers a few hundred sites, compared to over 8,000 petrol stations, so journey planning is essential.

Finding the Cheapest LPG Near You

Prices vary by location: LPG pump prices differ between stations, so checking before you travel can save a meaningful amount per fill, especially given the smaller number of sites available. 1

Check live prices: CheckFuelPrices lists petrol and diesel prices updated every 30 minutes across 4,000+ UK stations using CMA open data, helping you benchmark costs wherever you are. 1