| US legal cup | 1 c (US Legal) | 2 c (US Legal) | 3 c (US Legal) | 4 c (US Legal) | 5 c (US Legal) | 6 c (US Legal) | 7 c (US Legal) | 8 c (US Legal) | 9 c (US Legal) | 10 c (US Legal) | 11 c (US Legal) | 12 c (US Legal) | 13 c (US Legal) | 14 c (US Legal) | 15 c (US Legal) | 16 c (US Legal) | 17 c (US Legal) | 18 c (US Legal) | 19 c (US Legal) | 20 c (US Legal) | 21 c (US Legal) | 22 c (US Legal) | 23 c (US Legal) | 24 c (US Legal) | 25 c (US Legal) | 26 c (US Legal) | 27 c (US Legal) | 28 c (US Legal) | 29 c (US Legal) | 30 c (US Legal) | 31 c (US Legal) | 32 c (US Legal) | 33 c (US Legal) | 34 c (US Legal) | 35 c (US Legal) | 36 c (US Legal) | 37 c (US Legal) | 38 c (US Legal) | 39 c (US Legal) | 40 c (US Legal) | 41 c (US Legal) | 42 c (US Legal) | 43 c (US Legal) | 44 c (US Legal) | 45 c (US Legal) | 46 c (US Legal) | 47 c (US Legal) | 48 c (US Legal) | 49 c (US Legal) | 50 c (US Legal) | 51 c (US Legal) | 52 c (US Legal) | 53 c (US Legal) | 54 c (US Legal) | 55 c (US Legal) | 56 c (US Legal) | 57 c (US Legal) | 58 c (US Legal) | 59 c (US Legal) | 60 c (US Legal) | 61 c (US Legal) | 62 c (US Legal) | 63 c (US Legal) | 64 c (US Legal) | 65 c (US Legal) | 66 c (US Legal) | 67 c (US Legal) | 68 c (US Legal) | 69 c (US Legal) | 70 c (US Legal) | 71 c (US Legal) | 72 c (US Legal) | 73 c (US Legal) | 74 c (US Legal) | 75 c (US Legal) | 76 c (US Legal) | 77 c (US Legal) | 78 c (US Legal) | 79 c (US Legal) | 80 c (US Legal) | 81 c (US Legal) | 82 c (US Legal) | 83 c (US Legal) | 84 c (US Legal) | 85 c (US Legal) | 86 c (US Legal) | 87 c (US Legal) | 88 c (US Legal) | 89 c (US Legal) | 90 c (US Legal) | 91 c (US Legal) | 92 c (US Legal) | 93 c (US Legal) | 94 c (US Legal) | 95 c (US Legal) | 96 c (US Legal) | 97 c (US Legal) | 98 c (US Legal) | 99 c (US Legal) | 100 c (US Legal) |
| US liquid gallon | 0.0634013 US gal lqd | 0.1268026 US gal lqd | 0.1902039 US gal lqd | 0.2536052 US gal lqd | 0.3170065 US gal lqd | 0.3804078 US gal lqd | 0.4438090 US gal lqd | 0.5072103 US gal lqd | 0.5706116 US gal lqd | 0.6340129 US gal lqd | 0.6974142 US gal lqd | 0.7608155 US gal lqd | 0.8242168 US gal lqd | 0.8876181 US gal lqd | 0.9510194 US gal lqd | 1.0144207 US gal lqd | 1.0778220 US gal lqd | 1.1412233 US gal lqd | 1.2046246 US gal lqd | 1.2680259 US gal lqd | 1.3314271 US gal lqd | 1.3948284 US gal lqd | 1.4582297 US gal lqd | 1.5216310 US gal lqd | 1.5850323 US gal lqd | 1.6484336 US gal lqd | 1.7118349 US gal lqd | 1.7752362 US gal lqd | 1.8386375 US gal lqd | 1.9020388 US gal lqd | 1.9654401 US gal lqd | 2.0288414 US gal lqd | 2.0922427 US gal lqd | 2.1556439 US gal lqd | 2.2190452 US gal lqd | 2.2824465 US gal lqd | 2.3458478 US gal lqd | 2.4092491 US gal lqd | 2.4726504 US gal lqd | 2.5360517 US gal lqd | 2.5994530 US gal lqd | 2.6628543 US gal lqd | 2.7262556 US gal lqd | 2.7896569 US gal lqd | 2.8530582 US gal lqd | 2.9164595 US gal lqd | 2.9798608 US gal lqd | 3.0432620 US gal lqd | 3.1066633 US gal lqd | 3.1700646 US gal lqd | 3.2334659 US gal lqd | 3.2968672 US gal lqd | 3.3602685 US gal lqd | 3.4236698 US gal lqd | 3.4870711 US gal lqd | 3.5504724 US gal lqd | 3.6138737 US gal lqd | 3.6772750 US gal lqd | 3.7406763 US gal lqd | 3.8040776 US gal lqd | 3.8674788 US gal lqd | 3.9308801 US gal lqd | 3.9942814 US gal lqd | 4.0576827 US gal lqd | 4.1210840 US gal lqd | 4.1844853 US gal lqd | 4.2478866 US gal lqd | 4.3112879 US gal lqd | 4.3746892 US gal lqd | 4.4380905 US gal lqd | 4.5014918 US gal lqd | 4.5648931 US gal lqd | 4.6282944 US gal lqd | 4.6916956 US gal lqd | 4.7550969 US gal lqd | 4.8184982 US gal lqd | 4.8818995 US gal lqd | 4.9453008 US gal lqd | 5.0087021 US gal lqd | 5.0721034 US gal lqd | 5.1355047 US gal lqd | 5.1989060 US gal lqd | 5.2623073 US gal lqd | 5.3257086 US gal lqd | 5.3891099 US gal lqd | 5.4525112 US gal lqd | 5.5159125 US gal lqd | 5.5793137 US gal lqd | 5.6427150 US gal lqd | 5.7061163 US gal lqd | 5.7695176 US gal lqd | 5.8329189 US gal lqd | 5.8963202 US gal lqd | 5.9597215 US gal lqd | 6.0231228 US gal lqd | 6.0865241 US gal lqd | 6.1499254 US gal lqd | 6.2133267 US gal lqd | 6.2767280 US gal lqd | 6.3401293 US gal lqd |
The cup currently used in the United States for nutrition labelling is defined in United States law as 240 ml.
| 1 U.S. "legal" cup | = | 240 | millilitres |
| = | 16 | international tablespoons | |
| = | 12 | Australian tablespoons | |
| ≈ | 8.12 | U.S. customary fluid ounces | |
| ≈ | 8.45 | imperial fluid ounces |
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| US legal cup | c (US Legal) | ≡ 240 mL | = 2.4×10−4 m3 | Imperial/US |
| US legal cups | US liquid gallons | US legal cups | US liquid gallons |
|---|---|---|---|
| 1 | = 0.063401292565956 | 6 | = 0.38040775539573 |
| 2 | = 0.12680258513191 | 7 | = 0.44380904796169 |
| 3 | = 0.19020387769787 | 8 | = 0.50721034052764 |
| 4 | = 0.25360517026382 | 9 | = 0.5706116330936 |
| 5 | = 0.31700646282978 | 10 | = 0.63401292565956 |
The US gallon is legally defined as 231 cubic inches, which is exactly 3.785411784 liters. A US liquid gallon of water weighs about 8.34 pounds or 3.78 kilograms at 62 °F (17 °C), making it about 16.6% lighter than the imperial gallon. There are four quarts in a gallon, two pints in a quart and 16 US fluid ounces in a US pint, which makes the US fluid ounce equal to 1⁄128 of a US gallon. In order to overcome the effects of expansion and contraction with temperature when using a gallon to specify a quantity of material for purposes of trade, it is common to define the temperature at which the material will occupy the specified volume. For example, the volume of petroleum products and alcoholic beverages are both referenced to 60 °F (16 °C) in government regulations.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| US liquid gallon | US gal lqd | ≡ 231 cu in | ≡ 3.785411784×10−3 m3 | Imperial/US |
| US liquid gallons | US legal cups | US liquid gallons | US legal cups |
|---|---|---|---|
| 1 | = 15.7725491 | 6 | = 94.6352946 |
| 2 | = 31.5450982 | 7 | = 110.4078437 |
| 3 | = 47.3176473 | 8 | = 126.1803928 |
| 4 | = 63.0901964 | 9 | = 141.9529419 |
| 5 | = 78.8627455 | 10 | = 157.725491 |
| US legal cups | US liquid gallons |
|---|---|
| 1 | = 0.0634013 |
| 15.7725491 | = 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |