Convert one gallon (US) to liters

Explanation

To convert one gallon (US) to liters all we need is to know the conversion factor and we are done. Luckily, we can compute that factor using the units' definitions below.

The result is that there are approximately 3.7854 liters in 1 gallon (US).

Formula

1 gal ≈ 3.7854 l

gallons (US)gal

dimension	volume
system	U.S. customary units (USCS)
symbol	gal

The gallon (gal) is a unit of volume in the U.S. customary units.

Definition of the gallon

One gallon is equal to 231 cubic inches.

NIST Handbook 44 Specifications: Appendix C p. C-5

Value in terms of the SI

One gallon is equivalent to 3785.411784 cubic centimeters.

Equivalences

One US gallon is also equivalent to:

Some Facts

In the US, oil (petroleum) is priced per gallon. We also have to mention the very famous gallon of milk. In the rest of the world, the liter is prefered for the same usage.

US fluid volume units

minim	min
fluid dram	fl dr	60 minims
fluid ounce	fl oz	8 fluid drams
gill	gi	4 fluid ounces
pint	pt	4 gills
quart	qt	2 pints
gallon	gal	4 quarts
barrel	bbl	31.5 gallons
barrel (petroleum)	bbl	42 gallons

The United States Customary System

The United States customary system is a system of measurements used in the United States since 1832. It is based on English units in use before the definition of the Imperial system in 1824.

With the Metric Conversion Act of 1975 the U.S. began a metrication program but customary units are still widely used.

litersl

dimension	volume
symbol	l

The liter (l) is a unit of volume.

The liter is a metric unit, although not part of the International System of Units it is accepted for use alongside SI units (the cubic meter being the SI unit of volume).

Definition of the liter

One liter is equal to 1 cubic decimeter.

The International System of Units 9^th edition p. 145

Equivalences

One liter is also equivalent to:

Some Facts

In medicine, the amount of blood of a patient is estimated with a simple formula, 70 ml times the body weight in kilograms. For an average male adult of 75 kg this gives us 5.25 liters of blood. Thus, you would need roughly 715 000 people to fill up an entire olympic swimming pool with blood.

Metric volume units

microliter	µl	0.000 001
milliliter	ml	0.001
centiliter	cl	0.01
deciliter	dl	0.1
liter	l	1
dekaliter	dal	10
hectoliter	hl	100
kiloliter	kl	1 000
megaliter	Ml	1 000 000
gigaliter	Gl	1 000 000 000
teraliter	Tl	1 000 000 000 000