How do you convert gallons to liters?
Multiply the number of US gallons by 3.785. For the imperial gallon the factor is 4.546. Always check which gallon is meant: a 20 % gap shows up plainly on a tank of fuel.
US gallons = liters × 0.2642
Common volumes in gallons and liters
| 0.5 gal (US milk carton) | 1.89 l |
| 1 gal | 3.79 l |
| 5 gal | 18.93 l |
| 10 gal | 37.85 l |
| 15 gal (fuel tank) | 56.78 l |
| 20 gal | 75.71 l |
| 25 gal | 94.64 l |
| 31 gal (US beer barrel) | 117.35 l |
| 42 gal (oil barrel) | 158.99 l |
| 55 gal (US drum) | 208.20 l |
| 100 gal | 378.54 l |
Show every value
- 1 gal = 3.785 l
- 2 gal = 7.571 l
- 3 gal = 11.356 l
- 4 gal = 15.142 l
- 5 gal = 18.927 l
- 6 gal = 22.712 l
- 7 gal = 26.498 l
- 8 gal = 30.283 l
- 9 gal = 34.069 l
- 10 gal = 37.854 l
- 11 gal = 41.64 l
- 12 gal = 45.425 l
- 13 gal = 49.21 l
- 14 gal = 52.996 l
- 15 gal = 56.781 l
- 16 gal = 60.567 l
- 17 gal = 64.352 l
- 18 gal = 68.137 l
- 19 gal = 71.923 l
- 20 gal = 75.708 l
- 21 gal = 79.494 l
- 22 gal = 83.279 l
- 23 gal = 87.064 l
- 24 gal = 90.85 l
- 25 gal = 94.635 l
- 26 gal = 98.421 l
- 27 gal = 102.206 l
- 28 gal = 105.992 l
- 29 gal = 109.777 l
- 30 gal = 113.562 l
- 31 gal = 117.348 l
- 32 gal = 121.133 l
- 33 gal = 124.919 l
- 34 gal = 128.704 l
- 35 gal = 132.489 l
- 36 gal = 136.275 l
- 37 gal = 140.06 l
- 38 gal = 143.846 l
- 39 gal = 147.631 l
- 40 gal = 151.416 l
- 41 gal = 155.202 l
- 42 gal = 158.987 l
- 43 gal = 162.773 l
- 44 gal = 166.558 l
- 45 gal = 170.344 l
- 46 gal = 174.129 l
- 47 gal = 177.914 l
- 48 gal = 181.7 l
- 49 gal = 185.485 l
- 50 gal = 189.271 l
- 51 gal = 193.056 l
- 52 gal = 196.841 l
- 53 gal = 200.627 l
- 54 gal = 204.412 l
- 55 gal = 208.198 l
- 56 gal = 211.983 l
- 57 gal = 215.768 l
- 58 gal = 219.554 l
- 59 gal = 223.339 l
- 60 gal = 227.125 l
- 61 gal = 230.91 l
- 62 gal = 234.696 l
- 63 gal = 238.481 l
- 64 gal = 242.266 l
- 65 gal = 246.052 l
- 66 gal = 249.837 l
- 67 gal = 253.623 l
- 68 gal = 257.408 l
- 69 gal = 261.193 l
- 70 gal = 264.979 l
- 71 gal = 268.764 l
- 72 gal = 272.55 l
- 73 gal = 276.335 l
- 74 gal = 280.12 l
- 75 gal = 283.906 l
- 76 gal = 287.691 l
- 77 gal = 291.477 l
- 78 gal = 295.262 l
- 79 gal = 299.048 l
- 80 gal = 302.833 l
- 81 gal = 306.618 l
- 82 gal = 310.404 l
- 83 gal = 314.189 l
- 84 gal = 317.975 l
- 85 gal = 321.76 l
- 86 gal = 325.545 l
- 87 gal = 329.331 l
- 88 gal = 333.116 l
- 89 gal = 336.902 l
- 90 gal = 340.687 l
- 91 gal = 344.472 l
- 92 gal = 348.258 l
- 93 gal = 352.043 l
- 94 gal = 355.829 l
- 95 gal = 359.614 l
- 96 gal = 363.4 l
- 97 gal = 367.185 l
- 98 gal = 370.97 l
- 99 gal = 374.756 l
- 100 gal = 378.541 l
- 125 gal = 473.176 l
- 150 gal = 567.812 l
- 175 gal = 662.447 l
- 200 gal = 757.082 l
- 225 gal = 851.718 l
- 250 gal = 946.353 l
- 275 gal = 1,040.988 l
- 300 gal = 1,135.624 l
- 325 gal = 1,230.259 l
- 350 gal = 1,324.894 l
- 375 gal = 1,419.529 l
- 400 gal = 1,514.165 l
- 425 gal = 1,608.8 l
- 450 gal = 1,703.435 l
- 475 gal = 1,798.071 l
- 500 gal = 1,892.706 l
- 550 gal = 2,081.976 l
- 600 gal = 2,271.247 l
- 650 gal = 2,460.518 l
- 700 gal = 2,649.788 l
- 750 gal = 2,839.059 l
- 800 gal = 3,028.329 l
- 850 gal = 3,217.6 l
- 900 gal = 3,406.871 l
- 950 gal = 3,596.141 l
- 1,000 gal = 3,785.412 l
- 1,500 gal = 5,678.118 l
- 2,000 gal = 7,570.824 l
- 2,500 gal = 9,463.529 l
- 3,000 gal = 11,356.235 l
- 3,500 gal = 13,248.941 l
- 4,000 gal = 15,141.647 l
- 4,500 gal = 17,034.353 l
- 5,000 gal = 18,927.059 l
- 5,500 gal = 20,819.765 l
- 6,000 gal = 22,712.471 l
- 6,500 gal = 24,605.177 l
- 7,000 gal = 26,497.882 l
- 7,500 gal = 28,390.588 l
- 8,000 gal = 30,283.294 l
- 8,500 gal = 32,176 l
- 9,000 gal = 34,068.706 l
- 9,500 gal = 35,961.412 l
- 10,000 gal = 37,854.118 l
The US gallon is exactly 3.785411784 liters and the imperial gallon 4.54609 liters since its 1985 redefinition. Both values are exact by definition. Methodology & sources.
Frequently asked questions
US gallon or imperial gallon?
The US one is 3.785 l, the imperial 4.546 l. American sites and recipes mean the first, the UK and Canada often the second. The 20 % gap changes everything on a fuel tank.
Why is an oil barrel 159 liters?
Because it holds 42 US gallons, a standard inherited from whiskey casks reused in the first Pennsylvania oil fields around 1860. The figure owes nothing to the metric system and has never been revised.
How do I read fuel economy in miles per gallon?
Divide 235.2 by the miles per gallon figure to get liters per 100 km. A car rated at 30 mpg uses 7.8 l/100 km. The two scales run in opposite directions.
Why is the US gallon 3.785 liters?
Because it descends from the English wine gallon, fixed at 231 cubic inches by a statute of Queen Anne in 1707. The United States kept it unchanged after independence, while Britain swept away its dozens of local gallons in 1824 in favor of one larger gallon. Those 231 cubic inches work out to 3.785411784 liters, an exact figure rather than a rounded one.
Does a gallon of fuel depend on temperature?
By volume, yes. Gasoline expands by roughly 0.1 % per degree, so between 15 and 30 °C the same gallon carries about 1.4 % less matter. Wholesale trade settles the issue by billing net gallons corrected to 60 °F, that is 15.6 °C, while North American retail pumps usually measure the gross volume as it leaves the nozzle.