- How many gallons are in a liter?
- 0.264172 US gallons, or 0.219969 UK imperial gallons. Going the other way, one US gallon is exactly 3.785411784 L and one imperial gallon is exactly 4.54609 L. So to convert liters to US gallons, divide by 3.785411784; for imperial gallons, divide by 4.54609.
- What's the difference between a US gallon and a UK gallon?
- They were defined from different old measures. The US kept the Queen Anne wine gallon of 231 cubic inches, which works out to 3.785411784 L. Britain redefined its gallon in 1824 as the volume of 10 pounds of water, now fixed at 4.54609 L. The UK gallon is about 20% bigger, so 50 L is 13.2 US gallons but only 11 UK gallons. Canada, Ireland, and a few Caribbean countries still use the imperial gallon on older labels.
- Which gallon should I use?
- If the number came from the United States — fuel economy in mpg, a US product label, an American recipe — use US gallons. If it came from the UK, or from an older Canadian or Irish source, use imperial gallons. When a label just says "gallons" with no country, check where it was printed. Mixing them up is a 20% error, which is the difference between a full tank and running dry.
- What's a quick way to estimate liters to gallons in my head?
- For US gallons, divide by 4 and add 5%. 60 L → 15 → about 15.75 gal (exact: 15.85). Dividing by 4 alone comes in about 5% low, which is fine for a rough idea. For UK gallons, divide by 4.5: 45 L is just under 10 imperial gallons (9.9).
- How many gallons is a 50-liter fuel tank?
- 13.2 US gallons, or 11 UK gallons. Most small and mid-size cars have tanks between 40 and 60 L, which is roughly 10.6 to 15.9 US gallons. If you're renting a car abroad and pricing a fill-up, convert the tank size and the price per liter the same way, or the math won't match.
- Is a 2-liter soda bottle more or less than half a gallon?
- A little more. 2 L is 0.528 US gallons, and half a US gallon is 1.893 L, so the bottle holds about 107 mL extra. Against a UK gallon, 2 L is only 0.44 gallons — less than half.
- How precise is the answer?
- The conversion uses the exact defined values, so the only rounding is for display: four decimals once you're at a gallon or more, six below that (1 L shows as 0.264172). Very large volumes show as whole gallons with commas. Copy formula gives you the full calculation if you need to show your work.
- Is what I type saved or sent anywhere?
- No. The conversion runs in your browser. Nothing is sent to a server or stored, and closing the tab clears it.
