L to gal Converter
Turn metric liters into US gallon values
Liters to US gallons FAQ
How do you convert liters to US gallons exactly?
This calculator uses the standard definition 1 US liquid gallon = 3.785411784 liters. To convert liters to gallons, you divide the liters value by 3.785411784. For example, 50 L ÷ 3.785411784 ≈ 13.2086 gal. The tool handles this division for you and presents the result in a clean, copy-friendly format.
Is this for US gallons or imperial (UK) gallons?
This page is specifically for US liquid gallons. An imperial gallon, used in the UK and some other countries, is larger at about 4.546 L. If you are translating metric specs for American cars, boats, fuel cans, beverage kegs or cleaning products, US gallons are almost always the correct choice, which is what this converter uses.
Why do fuel and tank specs mix liters and gallons?
Manufacturers often publish specifications in both metric and US customary units. You might see a tank listed as 60 L in Europe and as about 15.9 gal in US brochures. When you only have the metric value, a fast L to gal conversion lets you compare vehicles, boats or generators across markets, or match your fuel records to local pump units.
What is 50 liters in gallons for a car tank?
Using the exact factor, 50 L ≈ 13.2086 gal, which most people round to 13.2 gal or 13 gal depending on the level of detail they need. That is a common size for compact car tanks and for portable fuel storage. You can plug in other values like 20 L, 60 L or 100 L to see the equivalent US gallons instantly.
Is a liter an SI unit like the cubic metre?
The liter (L) is a metric unit accepted for use with the SI, defined as 1 L = 1 cubic decimetre (0.001 m³). The gallon, on the other hand, belongs to US customary and imperial systems. Containers and spec sheets often show both so that users can work in whichever system they prefer. This converter connects the metric liter values to their US gallon equivalents.
How many decimal places of gallons should I keep?
For most day-to-day scenarios, two decimal places in gallons is more than enough. For instance, 75 L becomes about 19.81 gal. If you are planning long trips, dosing pool chemicals or calculating brew volumes, rounding to the nearest tenth or whole gallon is usually fine. The calculator keeps higher precision in the background so you can choose how to round based on your situation.
Can I use this for brewing, aquariums and household mixing?
Absolutely. Many recipe books, aquarium guides, pool-care instructions and chemical products give quantities in liters, while older hardware and equipment might still be described in US gallons. A quick liters to gallons conversion makes it easy to scale brew batches, check aquarium treatment doses, and understand how much solution you really get from a metric container when documentation is in gallons.
From metric liters on labels to US gallons in your head
This L to gal converter is built for the common situation where capacity or volume is listed in liters, but your instinct or local documentation uses US gallons. That happens with car and boat tanks, generator specs, storage drums, beverage kegs, aquarium systems and large cleaning supplies. Instead of approximating “about a quarter of the value”, you enter the liters once and get a precise US gallon figure such as “50 L ≈ 13.2086 gal”.
1. One simple input, one clear result
The interface stays intentionally minimal: a single input box for liters and a result card underneath. You can type whole numbers for container sizes such as 20 L or 200 L, or include decimals like 37.5 L for partial fills and batch sizes. The converter divides by the exact gallon factor and prints the answer with sensible formatting, ready to be read out, pasted into notes or shared with teammates and clients.
If you ever need to go back the other way, from US gallons to liters, the “Swap Units” button links directly to the gal to L page. That keeps the pair of tools working together so you can move between units without changing how you like to think about the volumes.
2. Exact relationship: 1 US gal = 3.785411784 L
Behind the scenes, the converter uses the legal US definition of the gallon: 1 US gallon = 231 cubic inches, which corresponds to 3.785411784 liters. That same factor is used in standards documents and official conversion tables, which means you can rely on the results for engineering work, safety documentation and formal reporting. When you need to work with other volume units such as milliliters, cubic metres, cups or fluid ounces, the volume conversion calculator covers a wider set of unit pairs in the same style.
3. Common L to gal values at a glance
Here are some sample conversions that match what the calculator outputs. They make handy checkpoints when you sanity-check tank sizes, drums and recipes:
| Liters (L) | US gallons (gal) |
|---|---|
| 5 L | 1.32 gal |
| 10 L | 2.64 gal |
| 20 L | 5.28 gal |
| 50 L | 13.21 gal |
| 75 L | 19.81 gal |
| 100 L | 26.42 gal |
| 200 L | 52.83 gal |
| 500 L | 132.09 gal |
A quick mental rule of thumb is to divide by four and add a little. For example, 40 L → 10 plus about 0.5 ≈ 10.5 gal. The calculator replaces that rough rule with an exact answer whenever you need a precise value for dosing, compliance or financial calculations.
4. Where the L to gal converter shines
You will most often reach for this tool in cases such as:
- Fuel and range planning — convert metric tank specs into US gallons to compare vehicles, boats or generators in US literature.
- Brewing and beverage production — translate recipe volumes given in liters into gallons that match kegs and US-style batch sizes.
- Aquarium, pond and pool care — match equipment and treatment dosages specified per gallon to water volumes you measured in liters.
- Industrial drums and IBC totes — understand how many US gallons are in 200 L or 1,000 L containers for logistics and invoicing.
- Cleaning and sanitation — convert metric concentrate volumes to gallons when instructions or regulations are written in US units.
Because it follows officially recognised definitions, you can come back to this liters to gallons converter any time and get consistent, predictable results that are easy to reuse across your projects, worksheets and documentation.
References and further reading on liters and gallons
These references explain how liters and gallons are defined and used:
- Litre — describes the liter as a metric unit of volume and its link to cubic metres.
- Gallon — covers US and imperial gallons, their history and precise definitions.
- SI Units — Volume (NIST) — gives official guidance on volume units, including the liter, in the SI system.
For regulated trade, safety documentation or certifications, always follow the rounding and reporting rules required by your local standards body or industry guidelines when converting between liters and US gallons.