Liters to Gallons Converter
Turn liters into U.S. gallons for fuel comparisons, beverage quantities, and volume planning.
How to use this liters to gallons converter
- Enter liters
Type the volume into the Liters field.
- Read the result
The equivalent value in Gallons appears instantly.
- Compare fuel costs
Multiply the per-gallon price by the result to estimate total cost.
How this liters to gallons converter works
This page converts liters into U.S. gallons using the standard liquid volume relationship used in U.S. customary measurements. It is helpful for fuel pricing, beverage quantities, and travel-related liquid conversions.
gallons = liters × 0.2641720524 3 liters × 0.2641720524 = 0.79 U.S. gallons.
A car's fuel tank holds 55 liters. In U.S. gallons: 55 × 0.2641720524 = 14.53 gallons — helpful for estimating fill-up costs when travelling.
- ✓ Length conversions use the international yard-and-pound agreement of 1959 (1 inch = 25.4 mm exactly), which underpins all imperial-to-metric length factors.
- ✓ Weight conversions treat mass and weight interchangeably under standard Earth gravity — the tool converts mass units (grams, pounds) without adjusting for local gravitational variation.
- ✓ Volume conversions use the metric definition where 1 liter = 1,000 cubic centimeters exactly, and U.S. customary fluid ounces / gallons are used (not Imperial UK gallons).
- ✓ Definition-based factors are exact where standards define them exactly; inverse decimal factors shown on one-way pages may be rounded for readability while still being based on the exact published relationship.
- When converting between metric prefixes (e.g. millimeters to kilometers), the tool simply shifts by powers of 10 — no rounding is introduced because the metric system is base-10 by design.
- Imperial and U.S. customary systems share some unit names (ounce, gallon, ton) but with different sizes. This tool uses U.S. customary definitions unless otherwise noted.
- For cooking measurements, note that a U.S. cup is 236.588 mL (not 250 mL), and a U.S. tablespoon is 14.787 mL — these differ from metric and Australian standards.
- Troy ounces (used for precious metals) differ from avoirdupois ounces (used for everyday weight): 1 troy oz = 31.1035 g vs. 1 avoirdupois oz = 28.3495 g.
- National Institute of Standards and Technology (NIST) — Handbook 44, Appendix C: General Tables of Units of Measurement
- Bureau International des Poids et Mesures (BIPM) — The International System of Units (SI), 9th edition
- U.S. Code Title 15, §205a–205l — Metric Conversion Act definitions
Liters and gallons around the world
The liter is the standard volume unit in most countries for fuel, beverages, and liquid goods. The U.S. gallon, equal to about 3.785 liters, is used mainly in the United States for fuel pricing, large-container labelling, and everyday liquid measurement. The Imperial gallon used in the UK and some Commonwealth countries is larger — about 4.546 liters — so always confirm which gallon a source refers to. This converter uses U.S. gallons, making it especially useful for comparing fuel prices, planning road trips, and converting metric packaging to U.S. kitchen quantities.
Liters to gallons converter FAQs
How many U.S. gallons are in 1 liter?
About 0.2642 U.S. gallons. Roughly speaking, 1 liter is a little more than a quarter gallon.
Does this use U.S. or UK gallons?
U.S. gallons. A U.S. gallon is about 3.785 liters, while an Imperial (UK) gallon is about 4.546 liters.
How can I use this to compare fuel prices?
Convert the tank or per-liter price into gallons so you can compare directly with U.S. per-gallon pricing.