Gallons to Liters Converter

How to convert gallons to liters

liters = gallons × 3.785411784

1 US gallon is exactly 231 cubic inches. 1 liter is exactly one cubic decimeter (0.001 cubic meter). 1 imperial gallon is exactly 4.54609 liters.

The factor 3.785411784 is exact, not a rounded value. Nothing is rounded until you choose how many decimals to show.

Worked example: 12 gal

1. Start with the value in gallons: 12 gal.
2. Multiply by 3.785411784, because 1 gallon = 3.785411784 liters: 12 × 3.785411784 = 45.424941408 L.
3. Round to the precision you need: 45.42 L to two decimals.

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Gallons to liters chart

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Gallons from 1 to 100 converted to liters with the exact factor, shown to five significant digits.

Gallons to liters, part 1 of 4

gal	L
1	3.7854
2	7.5708
3	11.356
4	15.142
5	18.927
6	22.712
7	26.498
8	30.283
9	34.069
10	37.854
11	41.64
12	45.425
13	49.21
14	52.996
15	56.781
16	60.567
17	64.352
18	68.137
19	71.923
20	75.708
21	79.494
22	83.279
23	87.064
24	90.85
25	94.635

Gallons to liters, part 2 of 4

gal	L
26	98.421
27	102.21
28	105.99
29	109.78
30	113.56
31	117.35
32	121.13
33	124.92
34	128.7
35	132.49
36	136.27
37	140.06
38	143.85
39	147.63
40	151.42
41	155.2
42	158.99
43	162.77
44	166.56
45	170.34
46	174.13
47	177.91
48	181.7
49	185.49
50	189.27

Gallons to liters, part 3 of 4

gal	L
51	193.06
52	196.84
53	200.63
54	204.41
55	208.2
56	211.98
57	215.77
58	219.55
59	223.34
60	227.12
61	230.91
62	234.7
63	238.48
64	242.27
65	246.05
66	249.84
67	253.62
68	257.41
69	261.19
70	264.98
71	268.76
72	272.55
73	276.34
74	280.12
75	283.91

Gallons to liters, part 4 of 4

gal	L
76	287.69
77	291.48
78	295.26
79	299.05
80	302.83
81	306.62
82	310.4
83	314.19
84	317.97
85	321.76
86	325.55
87	329.33
88	333.12
89	336.9
90	340.69
91	344.47
92	348.26
93	352.04
94	355.83
95	359.61
96	363.4
97	367.18
98	370.97
99	374.76
100	378.54

liters = gallons × 3.785411784. Factors: NIST SP 811, NIST Handbook 44, BIPM SI Brochure, UK Weights and Measures Act 1985. unitcheck.net/volume/gallons-to-liters/

US gallon or imperial gallon?

The converter starts with the US gallon (3.785411784 L, defined through the US gallon of exactly 231 cubic inches). The imperial gallon used in the United Kingdom is 4.54609 L, about 20% larger. Use the switch above the converter if your number comes from a British source.

Going the other way? Use the Liters to Gallons converter.