Convert Litre to US Gallon

Quick answer: Litre to US Gallon

1 Litre = 0.2641721 US Gallon (L → US gal). To convert litre to us gallon, multiply by 0.2641721. To convert us gallon to litre, multiply by 3.785412. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common litre-to-us gallon questions.

How to convert Litre to US Gallon

To convert litre to us gallon, multiply the number of litre by the conversion factor 0.2641721, because 1 L = 0.2641721 US gal. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 US gal = 3.785412 L, so you divide by 0.2641721 (or multiply by 3.785412) to turn us gallon back into litre.

US gal = L × 0.2641721  ·  L = US gal × 3.785412

1. Write down the value you want to convert, in litre.
2. Multiply it by 0.2641721.
3. The result is the same area/length/quantity expressed in us gallon.

Litre to US Gallon — worked examples

Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 litre is 1.32086 us gallon because 5 L × 0.2641721 = 1.32086 US gal.

Common Litre to US Gallon conversions

These are the litre-to-us gallon values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:

• 1 litre = 0.2641721 us gallon
• 2 litre = 0.5283441 us gallon
• 2.5 litre = 0.6604301 us gallon
• 3 litre = 0.7925162 us gallon
• 4 litre = 1.056688 us gallon
• 5 litre = 1.32086 us gallon
• 6 litre = 1.585032 us gallon
• 7 litre = 1.849204 us gallon
• 8 litre = 2.113376 us gallon
• 9 litre = 2.377548 us gallon
• 10 litre = 2.641721 us gallon
• 12 litre = 3.170065 us gallon
• 15 litre = 3.962581 us gallon
• 20 litre = 5.283441 us gallon
• 25 litre = 6.604301 us gallon
• 30 litre = 7.925162 us gallon
• 50 litre = 13.2086 us gallon
• 75 litre = 19.8129 us gallon
• 100 litre = 26.41721 us gallon
• 200 litre = 52.83441 us gallon
• 500 litre = 132.086 us gallon
• 1000 litre = 264.1721 us gallon

Litre to US Gallon conversion chart (both directions)

The chart below converts litre to us gallon and us gallon to litre side by side, so it works whichever way you need. 1 litre = 0.2641721 us gallon, and 1 us gallon = 3.785412 litre.

Litre vs US Gallon: which is bigger?

A us gallon is the larger unit: one us gallon equals 3.785412 litres. Put another way, you need 3.785412 litres to make a single us gallon.

What is a Litre? History, origin and usage

The litre was introduced in France in 1795 as a republican measure equal to one cubic decimetre, its name derived from the older French litron, in turn from Byzantine Greek (where it had been a unit of weight) via Late Medieval Latin. In 1901 the litre was redefined as the volume of one kilogram of pure water at maximum density, making it very slightly larger than a cubic decimetre. In 1964 that awkward definition was abandoned and the litre returned to being exactly one cubic decimetre.

The litre is the everyday metric unit of volume across most of the world: fuel sold at the pump, bottled water and soft drinks, milk, engine and cooking oil, and car engine capacity. It is the unit people reach for whenever a volume is larger than a kitchen spoonful but smaller than a tankful.

The litre is not an official SI unit but is accepted for use alongside it. Its symbol may be written as a capital L precisely because a lowercase l is easily mistaken for the digit 1 in many fonts.

What is a US Gallon? History, origin and usage

The US gallon descends from the British Queen Anne wine gallon, fixed by statute in 1706 as exactly 231 cubic inches and brought into force in 1707; the young United States kept this measure and adopted it formally in 1836. Britain, meanwhile, abolished the wine gallon and replaced it with the larger imperial gallon in 1824, which is why the two gallons differ today.

The US gallon is the standard American unit for selling fuel, milk, paint and many household liquids, and fuel economy is reported in miles per gallon. It is used across the United States and in a handful of countries influenced by American trade.

The US gallon is noticeably smaller than the imperial gallon used in the UK and Canada, a roughly one-fifth difference that catches out travellers comparing fuel prices. Its size is frozen at the 1707 Queen Anne standard, while Britain reformed away from it.

Convert 1 Litre to other units

It can help to see a litre next to the other units it is commonly compared with. One litre (L) is equal to:

Convert 1 US Gallon to other units

One us gallon (US gal) is equal to:

Tips for converting Litre to US Gallon

• To go from litre to us gallon, multiply by 0.2641721; to go back, divide by 0.2641721 (or multiply by 3.785412).
• For a quick mental estimate, remember that 1 litre ≈ 0.2641721 us gallon, so 10 litre ≈ 2.641721 us gallon.
• The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
• Both fields update live as you type — change either side to convert in that direction.

How to use this Litre to US Gallon converter

Type a number into the Litre field and the equivalent in US Gallon appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the US Gallon field to convert the other way (us gallon to litre). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.

Accuracy and method

Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 L = 0.2641721 US gal), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for litre-to-us gallon conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.

Sources

• NIST Special Publication 811 — Guide for the Use of the SI — publishes the exact metric equivalents of the customary units. The inch, foot, yard and mile are defined exactly in metres by the 1959 international yard-and-pound agreement, so every imperial figure on this page is exact, not rounded.
• BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.

Watch the system: a <strong>US</strong> gallon, quart, pint and fluid ounce are <strong>not</strong> the same size as the <strong>imperial (UK)</strong> ones — a US gallon is 3.785 L while an imperial gallon is 4.546 L, and a US fluid ounce (29.57 mL) is slightly larger than an imperial fluid ounce (28.41 mL). The units on this page are labelled US or Imperial so the result is unambiguous.

Frequently asked questions

How many us gallon are in 1 litre?

1 litre = 0.2641721 us gallon (US gal). To convert any number of litre to us gallon, multiply by 0.2641721.

How do I convert litre to us gallon?

Multiply the number of litre by 0.2641721. For example, 10 litre = 10 × 0.2641721 = 2.641721 us gallon, and 25 litre = 6.604301 us gallon.

How many litre are in 1 us gallon?

1 us gallon = 3.785412 litre. So to convert us gallon back to litre, multiply by 3.785412.

What is the formula to convert litre to us gallon?

us gallon = litre × 0.2641721. The reverse formula is litre = us gallon × 3.785412.

How much is 100 litre in us gallon?

100 litre = 26.41721 us gallon. (And 1000 litre = 264.1721 us gallon.)

Which is bigger, a litre or a us gallon?

A us gallon is larger: 1 us gallon = 3.785412 litre.

Is this litre to us gallon converter accurate?

Yes — every value is computed from the exact 0.2641721 US gal per L factor (not rounded look-up tables), and the factors are re-verified automatically on every update.

Can I convert us gallon to litre too?

Yes. The converter works both ways — enter a value in either field. 1 us gallon = 3.785412 litre.

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