Convert Liters to US Gallons

A US liquid gallon is 3.785411784 liters, while a UK imperial gallon is 4.54609 liters, about 20% larger. The split dates to 1824, when Britain redefined its gallon based on 10 lb of water; the US kept the older Queen Anne wine gallon. So a UK "mpg" figure converts to fewer miles per US gallon, and a 5-gallon US jerry can is smaller than a UK 5-gallon one. Always check which gallon a number refers to before comparing fuel economy or recipes across the Atlantic.

Metric adoption hit fuel retail decades ago because pump dispensers were easy to recalibrate and government revenue (tax per volume) needed a uniform unit. The US, Liberia, and Myanmar still sell by US gallons. Canada switched in 1979, the UK in 1995 at the pump even though dashboards still display mpg. A 50-liter European tank holds 13.21 US gallons. Calcflux uses the exact 3.785411784 factor so a 60 L diesel fill matches what a US-spec truck owner expects to see.

Multiply the price by 3.785411784, the number of liters in a US gallon. €1.80 per liter is €6.81 per gallon, and €1.65 per liter is €6.25 per gallon, before any currency conversion. A common slip is multiplying by 0.264 instead, which converts the volume rather than the price and makes fuel look about 14 times cheaper than it is. Convert currency last, using the exchange rate on your card statement.

19 L is 5.02 US gallons. Water-cooler bottles are built to a 5-gallon standard (18.93 L) and are labeled 18.9 L or 19 L in metric markets, so both names describe the same jug. By comparison, a 4 L bottle is 1.06 gallons, slightly more than a US gallon jug of 3.785 L.

Close, but not identical. 200 L is 52.83 US gallons, while a 55-gallon drum holds 208.2 L. Steel drums are often sold as "55 gal / 208 L" in the US and as "200 L" elsewhere, and the brim capacity can run a little higher than the nominal fill. For dosing chemicals or sizing rainwater storage, start from the capacity printed by the manufacturer, then convert.

To convert Liters to US Gallons, use the conversion where 1 Liter (L) = 0.264172 US Gallons (US gal). For example, 1 Liter = 0.264172 US Gallons.

Here are common conversions: 1 Liters = 0.264172 US Gallons, 5 Liters = 1.32086 US Gallons, 10 Liters = 2.64172 US Gallons, 25 Liters = 6.6043 US Gallons, 50 Liters = 13.2086 US Gallons, 100 Liters = 26.4172 US Gallons.

How many US gallons does a 50-liter European fuel tank hold?. Scaling recipes between metric and US customary measures. Understanding beverage container sizes when shopping abroad.

All conversions use exact factors verified against NIST and ISO standards with up to 10 significant figures of precision. Results are calculated using IEEE 754 double-precision arithmetic, which provides approximately 15-17 significant digits. For temperature and other non-linear conversions, exact formulas are used rather than approximations.

1 Liters equals 0.264 US gal US Gallons. This is a frequently referenced value because it represents one liter — a standard water bottle size.