Liters to Gallons (L to gal) Converter

Instantly convert liters (L) to gallons (gal). Our bidirectional tool handles US Gallons, UK (Imperial) Gallons, milliliters, quarts, pints, cups, and fluid ounces.

Full original guide (expanded)

Liters to Gallons (L to gal) Converter

A complete liquid volume converter for kitchen, automotive, and scientific use. Enter a value in any field to instantly convert between all units (US and UK).

Metric Units

US Customary Units

UK Imperial Units

US Gallon vs. UK Gallon: A Critical Difference

The most common error when converting "gallons" is not knowing which gallon you are using. The US and UK (Imperial) gallons are **not the same size**.

  • 1 US Liquid Gallon = 3.7854 Liters
  • 1 UK Imperial Gallon = 4.54609 Liters

As you can see, the **UK gallon is approximately 20% larger** than the US gallon. This is critical for recipes, fuel economy calculations, and scientific measurements. Our calculator includes both to prevent this error.

Conversion Formulas

US Gallon to Liters: Liters = US Gallons × 3.7854
Liters to US Gallons: US Gallons = Liters × 0.264172
UK Gallon to Liters: Liters = UK Gallons × 4.54609
Liters to UK Gallons: UK Gallons = Liters × 0.219969

US Cooking Conversions

For recipes, the smaller US units are all related:

  • 1 US Gallon = 4 Quarts
  • 1 US Quart = 2 Pints
  • 1 US Pint = 2 Cups
  • 1 US Cup = 8 Fluid Ounces
  • 1 US Fluid Ounce = 2 Tablespoons

Frequently Asked Questions (FAQ)

How many liters are in a gallon?

There are **3.7854 liters** in 1 **US Gallon**.
There are **4.546 liters** in 1 **UK (Imperial) Gallon**.

Is a US gallon the same as a UK gallon?

No. The UK (Imperial) gallon is about 20% larger than the US gallon. (1 UK Gallon = 1.201 US Gallons).

How many liters are in 5 gallons of gas?

In the US, this would be 5 US Gallons, so: 5 × 3.7854 = 18.927 Liters.
In the UK or Canada, this would be 5 Imperial Gallons, so: 5 × 4.546 = 22.73 Liters.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
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Formula (extracted text)
US Gallon to Liters: Liters = US Gallons × 3.7854 Liters to US Gallons: US Gallons = Liters × 0.264172
Formula (extracted text)
UK Gallon to Liters: Liters = UK Gallons × 4.54609 Liters to UK Gallons: UK Gallons = Liters × 0.219969
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
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Formulas

(Formulas preserved from original page content, if present.)

Version 0.1.0-draft
Citations

Add authoritative sources relevant to this calculator (standards bodies, manuals, official docs).

Changelog
  • 0.1.0-draft — 2026-01-19: Initial draft (review required).