| Imperial fluid ounce | 1 fl oz (imp) | 2 fl oz (imp) | 3 fl oz (imp) | 4 fl oz (imp) | 5 fl oz (imp) | 6 fl oz (imp) | 7 fl oz (imp) | 8 fl oz (imp) | 9 fl oz (imp) | 10 fl oz (imp) | 11 fl oz (imp) | 12 fl oz (imp) | 13 fl oz (imp) | 14 fl oz (imp) | 15 fl oz (imp) | 16 fl oz (imp) | 17 fl oz (imp) | 18 fl oz (imp) | 19 fl oz (imp) | 20 fl oz (imp) | 21 fl oz (imp) | 22 fl oz (imp) | 23 fl oz (imp) | 24 fl oz (imp) | 25 fl oz (imp) | 26 fl oz (imp) | 27 fl oz (imp) | 28 fl oz (imp) | 29 fl oz (imp) | 30 fl oz (imp) | 31 fl oz (imp) | 32 fl oz (imp) | 33 fl oz (imp) | 34 fl oz (imp) | 35 fl oz (imp) | 36 fl oz (imp) | 37 fl oz (imp) | 38 fl oz (imp) | 39 fl oz (imp) | 40 fl oz (imp) | 41 fl oz (imp) | 42 fl oz (imp) | 43 fl oz (imp) | 44 fl oz (imp) | 45 fl oz (imp) | 46 fl oz (imp) | 47 fl oz (imp) | 48 fl oz (imp) | 49 fl oz (imp) | 50 fl oz (imp) | 51 fl oz (imp) | 52 fl oz (imp) | 53 fl oz (imp) | 54 fl oz (imp) | 55 fl oz (imp) | 56 fl oz (imp) | 57 fl oz (imp) | 58 fl oz (imp) | 59 fl oz (imp) | 60 fl oz (imp) | 61 fl oz (imp) | 62 fl oz (imp) | 63 fl oz (imp) | 64 fl oz (imp) | 65 fl oz (imp) | 66 fl oz (imp) | 67 fl oz (imp) | 68 fl oz (imp) | 69 fl oz (imp) | 70 fl oz (imp) | 71 fl oz (imp) | 72 fl oz (imp) | 73 fl oz (imp) | 74 fl oz (imp) | 75 fl oz (imp) | 76 fl oz (imp) | 77 fl oz (imp) | 78 fl oz (imp) | 79 fl oz (imp) | 80 fl oz (imp) | 81 fl oz (imp) | 82 fl oz (imp) | 83 fl oz (imp) | 84 fl oz (imp) | 85 fl oz (imp) | 86 fl oz (imp) | 87 fl oz (imp) | 88 fl oz (imp) | 89 fl oz (imp) | 90 fl oz (imp) | 91 fl oz (imp) | 92 fl oz (imp) | 93 fl oz (imp) | 94 fl oz (imp) | 95 fl oz (imp) | 96 fl oz (imp) | 97 fl oz (imp) | 98 fl oz (imp) | 99 fl oz (imp) | 100 fl oz (imp) |
| US legal cup | 0.1183878 c (US Legal) | 0.2367755 c (US Legal) | 0.3551633 c (US Legal) | 0.4735510 c (US Legal) | 0.5919388 c (US Legal) | 0.7103266 c (US Legal) | 0.8287143 c (US Legal) | 0.9471021 c (US Legal) | 1.0654898 c (US Legal) | 1.1838776 c (US Legal) | 1.3022654 c (US Legal) | 1.4206531 c (US Legal) | 1.5390409 c (US Legal) | 1.6574286 c (US Legal) | 1.7758164 c (US Legal) | 1.8942042 c (US Legal) | 2.0125919 c (US Legal) | 2.1309797 c (US Legal) | 2.2493674 c (US Legal) | 2.3677552 c (US Legal) | 2.4861430 c (US Legal) | 2.6045307 c (US Legal) | 2.7229185 c (US Legal) | 2.8413063 c (US Legal) | 2.9596940 c (US Legal) | 3.0780818 c (US Legal) | 3.1964695 c (US Legal) | 3.3148573 c (US Legal) | 3.4332451 c (US Legal) | 3.5516328 c (US Legal) | 3.6700206 c (US Legal) | 3.7884083 c (US Legal) | 3.9067961 c (US Legal) | 4.0251839 c (US Legal) | 4.1435716 c (US Legal) | 4.2619594 c (US Legal) | 4.3803471 c (US Legal) | 4.4987349 c (US Legal) | 4.6171227 c (US Legal) | 4.7355104 c (US Legal) | 4.8538982 c (US Legal) | 4.9722859 c (US Legal) | 5.0906737 c (US Legal) | 5.2090615 c (US Legal) | 5.3274492 c (US Legal) | 5.4458370 c (US Legal) | 5.5642247 c (US Legal) | 5.6826125 c (US Legal) | 5.8010003 c (US Legal) | 5.9193880 c (US Legal) | 6.0377758 c (US Legal) | 6.1561635 c (US Legal) | 6.2745513 c (US Legal) | 6.3929391 c (US Legal) | 6.5113268 c (US Legal) | 6.6297146 c (US Legal) | 6.7481023 c (US Legal) | 6.8664901 c (US Legal) | 6.9848779 c (US Legal) | 7.1032656 c (US Legal) | 7.2216534 c (US Legal) | 7.3400411 c (US Legal) | 7.4584289 c (US Legal) | 7.5768167 c (US Legal) | 7.6952044 c (US Legal) | 7.8135922 c (US Legal) | 7.9319799 c (US Legal) | 8.0503677 c (US Legal) | 8.1687555 c (US Legal) | 8.2871432 c (US Legal) | 8.4055310 c (US Legal) | 8.5239188 c (US Legal) | 8.6423065 c (US Legal) | 8.7606943 c (US Legal) | 8.8790820 c (US Legal) | 8.9974698 c (US Legal) | 9.1158576 c (US Legal) | 9.2342453 c (US Legal) | 9.3526331 c (US Legal) | 9.4710208 c (US Legal) | 9.5894086 c (US Legal) | 9.7077964 c (US Legal) | 9.8261841 c (US Legal) | 9.9445719 c (US Legal) | 10.0629596 c (US Legal) | 10.1813474 c (US Legal) | 10.2997352 c (US Legal) | 10.4181229 c (US Legal) | 10.5365107 c (US Legal) | 10.6548984 c (US Legal) | 10.7732862 c (US Legal) | 10.8916740 c (US Legal) | 11.0100617 c (US Legal) | 11.1284495 c (US Legal) | 11.2468372 c (US Legal) | 11.365225 c (US Legal) | 11.4836128 c (US Legal) | 11.6020005 c (US Legal) | 11.7203883 c (US Legal) | 11.8387760 c (US Legal) |
A fluid ounce (abbreviated fl oz, fl. oz. or oz. fl., old forms ℥, fl ℥, f℥, ƒ ℥) is a unit of volume (also called capacity) typically used for measuring liquids. Various definitions have been used throughout history, but only two are still in common use: the British Imperial and the United States customary fluid ounce. An imperial fluid ounce is 1⁄20 of an imperial pint, 1⁄160 of an imperial gallon or approximately 28.4 ml. A US fluid ounce is 1⁄16 of a US fluid pint and 1⁄128 of a US liquid gallon or approximately 29.57 ml, making it about 4% larger than the imperial fluid ounce.
Imperial fluid ounce
| 1 imperial fluid ounce | = | 1⁄160 | imperial gallon |
| = | 1⁄40 | imperial quart | |
| = | 1⁄20 | imperial pint | |
| = | 1⁄5 | imperial gill | |
| = | 8 | imperial fluid drams | |
| = | 28.4130625 | millilitres | |
| ≈ | 1.733871455 | cubic inches | |
| ≈ | 0.960759940 | US fluid ounces | |
| ≈ | the volume of 1 avoirdupois ounce of water | ||
| 1 Imperial fluid ounces = 0.11838776041667 US legal cups | 6 Imperial fluid ounces = 0.7103265625 US legal cups |
| 2 Imperial fluid ounces = 0.23677552083333 US legal cups | 7 Imperial fluid ounces = 0.82871432291667 US legal cups |
| 3 Imperial fluid ounces = 0.35516328125 US legal cups | 8 Imperial fluid ounces = 0.94710208333333 US legal cups |
| 4 Imperial fluid ounces = 0.47355104166667 US legal cups | 9 Imperial fluid ounces = 1.06548984375 US legal cups |
| 5 Imperial fluid ounces = 0.59193880208333 US legal cups | 10 Imperial fluid ounces = 1.1838776041667 US legal cups |
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 |
| 1 US legal cups = 8.446819134685 Imperial fluid ounces | 6 US legal cups = 50.68091480811 Imperial fluid ounces |
| 2 US legal cups = 16.89363826937 Imperial fluid ounces | 7 US legal cups = 59.127733942795 Imperial fluid ounces |
| 3 US legal cups = 25.340457404055 Imperial fluid ounces | 8 US legal cups = 67.57455307748 Imperial fluid ounces |
| 4 US legal cups = 33.78727653874 Imperial fluid ounces | 9 US legal cups = 76.021372212165 Imperial fluid ounces |
| 5 US legal cups = 42.234095673425 Imperial fluid ounces | 10 US legal cups = 84.46819134685 Imperial fluid ounces |
| 1 Imperial fluid ounces = 0.1183878 US legal cups |
| 1 US legal cups = 8.4468191 Imperial fluid ounces |