Convert Between Litres and Gallons

Let’s be honest — you’ve filled up in car at a pump and the machine shows you litres. But somewhere in the back of your mind you might be thinking...

🚘 “How many gallons did I just put in?”

You filled up 40 litres. Your mind goes: “So that’s how many gallons?” With a converter: 40 L ÷ 4.546 = ≈ 8.8 UK gallons. Now you understand your tank size or how much you’re buying. (resolvo.uk)

💰 “What will this full tank cost me?”

Your car’s tank says 60 L. Fuel price is £1.45/L. So 60 × 1.45 = £87. But you want gallons too. 60 ÷ 4.546 = ≈ 13.2 gallons. Now you can compare efficiency, cost, or decide if that road‑trip is worth it.

📏 “My car says 12 gallons — how many litres is that?”

Some older UK car handbooks, imported models or reviews still list gallons. Convert: 12 × 4.546 = ≈ 54.6 litres. You can then compare what you’re buying at the pump.

🚐 “We’re off in the campervan/boat – better check the fuel usage”

Campers, motorhomes, boats or even generators sometimes think in gallons. Converting to litres means you can refill at a UK pump confidently, budget correctly and avoid surprises.

📊 “Tracking MPG or fuel efficiency but I only know litres”

Fuel is sold in litres. Efficiency is often talked about in MPG (miles per gallon) in the UK. A litres‑to‑gallons converter bridges that gap so you can calculate MPG properly, or compare real‑world usage to specs. (Which?)

How Our Converter Works

At Resolvo we’ve built a simple tool:

• Input litres → get UK Imperial gallons instantly.

• Example: Input 50 L → shows 11.0 gal (UK) because 50 ÷ 4.546 = ~11.0.

• Quick reference: 20 L = ~4.4 gal | 60 L = ~13.2 gal. (resolvo.uk)

• Works for any liquid volume conversion between litres and UK gallons — not just fuel. (resolvo.uk)

Why the 4.546 Conversion Factor Matters

• One UK Imperial gallon is defined as exactly 4.546 litres. (Unit Converters)

• Compare with the US gallon: 1 US gallon ≈ 3.785 litres — meaning the UK gallon is about 20% larger. (Kisskind)

• Using the correct factor is critical if you’re comparing specs, fuel cost, or filling from international sources.

• Example: If you mistakenly convert using a US gallon figure, your litres figure will be off, leading to cost or efficiency miscalculations.

Use Cases That Make a Real Difference

• Budgeting for road‑trips: Knowing your tank size in gallons helps you estimate how many fills you’ll need, how far you can travel, and how much it’ll cost.

• Used car buying: You spot a car with a “13‑gallon tank” listing. Convert → ~59 L. Now you can compare with UK equivalents.

• Fuel price comparison: If a pump advertises per litre, but you’re used to gallons, convert so you understand what you’re paying in “gallons terms”.

• Tracking fuel efficiency: To calculate MPG, you may want to know how many gallons you used when you filled up in litres.

• Working vehicles/logistics: Operators dealing in gallons or specs can convert to litres for UK fuel purchases and compliance.

• International travel & imports: Knowing the difference between UK and US gallons prevents mis‑interpretation of specs or fuel requirements.

Quick Reference Table

Final Thoughts

Never be caught out by unit confusion again. Whether you’re filling up, buying a used car, tracking your MPG or just curious about your tank size, converting litres to UK gallons is a savvy driver move.

Our free Real‑Time converter at Resolvo helps you bridge that gap instantly — no registration, just results. Use the tool, make sense of your fuel, save money, and maybe avoid surprises at the pump.