A quick two-way imp gal ⇄ L converter: type in either box, choose how many decimals you want and copy the answer with one click.
imp gal
L
Step-by-step calculation
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How to use the Imperial Gallons to Liters Converter
Type a value in the Imperial gallons box. The liters result appears instantly.
Going the other way? Type in the Liters box, or press the ⇄ swap button.
Set the precision with the decimal places menu.
Check the working in the step-by-step box, then press Copy result or click any row in the tables below.
Imperial gallons to liters formula
L = imp gal × 4.54609
Take the value in imperial gallons.
Multiply it by 4.54609 (the number of liters in one imperial gallon).
Example: 1 imp gal × 4.54609 = 4.54609 L.
Reverse formula (liters to imperial gallons): imp gal = L ÷ 4.54609. Example: 45.4609 L ÷ 4.54609 = 10 imp gal.
Quick mental estimate: multiply by about 4.5. For exact answers use the converter above.
imp gal to L conversion table (1–100)
Click any row to load it into the converter.
Imperial gallons to liters
Imperial gallons
Liters
1 imp gal
4.55 L
2 imp gal
9.09 L
3 imp gal
13.64 L
4 imp gal
18.18 L
5 imp gal
22.73 L
6 imp gal
27.28 L
7 imp gal
31.82 L
8 imp gal
36.37 L
9 imp gal
40.91 L
10 imp gal
45.46 L
11 imp gal
50.01 L
12 imp gal
54.55 L
13 imp gal
59.1 L
14 imp gal
63.65 L
15 imp gal
68.19 L
16 imp gal
72.74 L
17 imp gal
77.28 L
18 imp gal
81.83 L
19 imp gal
86.38 L
20 imp gal
90.92 L
21 imp gal
95.47 L
22 imp gal
100.01 L
23 imp gal
104.56 L
24 imp gal
109.11 L
25 imp gal
113.65 L
26 imp gal
118.2 L
27 imp gal
122.74 L
28 imp gal
127.29 L
29 imp gal
131.84 L
30 imp gal
136.38 L
31 imp gal
140.93 L
32 imp gal
145.47 L
33 imp gal
150.02 L
34 imp gal
154.57 L
35 imp gal
159.11 L
36 imp gal
163.66 L
37 imp gal
168.21 L
38 imp gal
172.75 L
39 imp gal
177.3 L
40 imp gal
181.84 L
41 imp gal
186.39 L
42 imp gal
190.94 L
43 imp gal
195.48 L
44 imp gal
200.03 L
45 imp gal
204.57 L
46 imp gal
209.12 L
47 imp gal
213.67 L
48 imp gal
218.21 L
49 imp gal
222.76 L
50 imp gal
227.3 L
51 imp gal
231.85 L
52 imp gal
236.4 L
53 imp gal
240.94 L
54 imp gal
245.49 L
55 imp gal
250.03 L
56 imp gal
254.58 L
57 imp gal
259.13 L
58 imp gal
263.67 L
59 imp gal
268.22 L
60 imp gal
272.77 L
61 imp gal
277.31 L
62 imp gal
281.86 L
63 imp gal
286.4 L
64 imp gal
290.95 L
65 imp gal
295.5 L
66 imp gal
300.04 L
67 imp gal
304.59 L
68 imp gal
309.13 L
69 imp gal
313.68 L
70 imp gal
318.23 L
71 imp gal
322.77 L
72 imp gal
327.32 L
73 imp gal
331.86 L
74 imp gal
336.41 L
75 imp gal
340.96 L
76 imp gal
345.5 L
77 imp gal
350.05 L
78 imp gal
354.6 L
79 imp gal
359.14 L
80 imp gal
363.69 L
81 imp gal
368.23 L
82 imp gal
372.78 L
83 imp gal
377.33 L
84 imp gal
381.87 L
85 imp gal
386.42 L
86 imp gal
390.96 L
87 imp gal
395.51 L
88 imp gal
400.06 L
89 imp gal
404.6 L
90 imp gal
409.15 L
91 imp gal
413.69 L
92 imp gal
418.24 L
93 imp gal
422.79 L
94 imp gal
427.33 L
95 imp gal
431.88 L
96 imp gal
436.42 L
97 imp gal
440.97 L
98 imp gal
445.52 L
99 imp gal
450.06 L
100 imp gal
454.61 L
Liters to imperial gallons
Liters
Imperial gallons
1 L
0.22 imp gal
2 L
0.44 imp gal
3 L
0.66 imp gal
4 L
0.88 imp gal
5 L
1.1 imp gal
6 L
1.32 imp gal
7 L
1.54 imp gal
8 L
1.76 imp gal
9 L
1.98 imp gal
10 L
2.2 imp gal
11 L
2.42 imp gal
12 L
2.64 imp gal
13 L
2.86 imp gal
14 L
3.08 imp gal
15 L
3.3 imp gal
16 L
3.52 imp gal
17 L
3.74 imp gal
18 L
3.96 imp gal
19 L
4.18 imp gal
20 L
4.4 imp gal
21 L
4.62 imp gal
22 L
4.84 imp gal
23 L
5.06 imp gal
24 L
5.28 imp gal
25 L
5.5 imp gal
26 L
5.72 imp gal
27 L
5.94 imp gal
28 L
6.16 imp gal
29 L
6.38 imp gal
30 L
6.6 imp gal
31 L
6.82 imp gal
32 L
7.04 imp gal
33 L
7.26 imp gal
34 L
7.48 imp gal
35 L
7.7 imp gal
36 L
7.92 imp gal
37 L
8.14 imp gal
38 L
8.36 imp gal
39 L
8.58 imp gal
40 L
8.8 imp gal
41 L
9.02 imp gal
42 L
9.24 imp gal
43 L
9.46 imp gal
44 L
9.68 imp gal
45 L
9.9 imp gal
46 L
10.12 imp gal
47 L
10.34 imp gal
48 L
10.56 imp gal
49 L
10.78 imp gal
50 L
11 imp gal
51 L
11.22 imp gal
52 L
11.44 imp gal
53 L
11.66 imp gal
54 L
11.88 imp gal
55 L
12.1 imp gal
56 L
12.32 imp gal
57 L
12.54 imp gal
58 L
12.76 imp gal
59 L
12.98 imp gal
60 L
13.2 imp gal
61 L
13.42 imp gal
62 L
13.64 imp gal
63 L
13.86 imp gal
64 L
14.08 imp gal
65 L
14.3 imp gal
66 L
14.52 imp gal
67 L
14.74 imp gal
68 L
14.96 imp gal
69 L
15.18 imp gal
70 L
15.4 imp gal
71 L
15.62 imp gal
72 L
15.84 imp gal
73 L
16.06 imp gal
74 L
16.28 imp gal
75 L
16.5 imp gal
76 L
16.72 imp gal
77 L
16.94 imp gal
78 L
17.16 imp gal
79 L
17.38 imp gal
80 L
17.6 imp gal
81 L
17.82 imp gal
82 L
18.04 imp gal
83 L
18.26 imp gal
84 L
18.48 imp gal
85 L
18.7 imp gal
86 L
18.92 imp gal
87 L
19.14 imp gal
88 L
19.36 imp gal
89 L
19.58 imp gal
90 L
19.8 imp gal
91 L
20.02 imp gal
92 L
20.24 imp gal
93 L
20.46 imp gal
94 L
20.68 imp gal
95 L
20.9 imp gal
96 L
21.12 imp gal
97 L
21.34 imp gal
98 L
21.56 imp gal
99 L
21.78 imp gal
100 L
22 imp gal
Common values
Imperial gallons
Liters
Example
0.5 imp gal
2.27 L
Half gallon
1 imp gal
4.55 L
1 imperial gallon
2 imp gal
9.09 L
2 gallons
5 imp gal
22.73 L
5 gallons
10 imp gal
45.46 L
10 gallons
12 imp gal
54.55 L
Car fuel tank (approx.)
20 imp gal
90.92 L
20 gallons
50 imp gal
227.3 L
50 gallons
About imperial gallons and liters
Imperial gallons (imp gal). The UK imperial gallon is exactly 4.54609 liters, about 20% larger than the US gallon (3.785 L). It is used in the UK for fuel economy (mpg) and in some Commonwealth countries.
Liters (L). The liter is a metric volume unit equal to 1,000 milliliters or one cubic decimeter. One liter of water has a mass of about 1 kg.
Frequently asked questions
1 imperial gallon equals how many liters?
One imperial gallon equals 4.54609 liters.
How do you convert imperial gallons to liters?
Multiply the number of imperial gallons by 4.54609. For example, 1 imp gal × 4.54609 = 4.54609 L.
What is 10 imperial gallons in liters?
10 imp gal is 45.4609 L.
How do I convert liters back to imperial gallons?
Divide by 4.54609, or press the ⇄ swap button above. For example, 45.4609 L ÷ 4.54609 = 10 imp gal.
Why are UK and US gallons different?
The US kept the old English wine gallon of 231 cubic inches (3.785 L), while Britain redefined its gallon in 1824 as 10 pounds of water, 4.54609 L. One imperial gallon is about 1.2 US gallons.
Is a milliliter the same as a cubic centimeter?
Yes. 1 mL is exactly 1 cm³ (cc), and 1 liter is 1,000 cm³. One liter of water weighs about 1 kg at room temperature.