Hoe reken je fluid ounce naar milliliter om?
Vermenigvuldig het aantal Amerikaanse fluid ounce met 29,57. Voor het gemak rekent u 30 ml per ounce: het verschil is 1,4%, onzichtbaar in een glas en lastig in een zuigfles.
milliliter = Amerikaanse fluid ounce × 29,5735Amerikaanse fluid ounce = milliliter ÷ 29,5735
Waar deze twee eenheden dienen
De Amerikaanse fluid ounce is een honderdachtentwintigste gallon, dus 29,5735 milliliter, en blijkt groter dan de imperiale van 28,4131 hoewel zijn gallon kleiner is. De milliliter is precies gelijk aan de kubieke centimeter, en het is de eenheid van siroopdoses, injectiespuiten en cosmeticaflesjes.
Gangbare volumes in fluid ounce en milliliter
| 0,5 fl oz (1 eetlepel) | 14,8 ml |
| 1 fl oz | 29,6 ml |
| 2 fl oz (espresso) | 59,1 ml |
| 4 fl oz | 118,3 ml |
| 8 fl oz (1 cup) | 236,6 ml |
| 12 fl oz (Amerikaans blikje) | 354,9 ml |
| 16 fl oz (Amerikaanse pint) | 473,2 ml |
| 20 fl oz | 591,5 ml |
| 32 fl oz (1 Amerikaanse quart) | 946,4 ml |
| 33,8 fl oz | 1.000 ml (1 liter) |
| 64 fl oz (halve Amerikaanse gallon) | 1.892,7 ml |
Alle waarden tonen
- 1 fl oz = 29,57 ml
- 2 fl oz = 59,15 ml
- 3 fl oz = 88,72 ml
- 4 fl oz = 118,29 ml
- 5 fl oz = 147,87 ml
- 6 fl oz = 177,44 ml
- 7 fl oz = 207,01 ml
- 8 fl oz = 236,59 ml
- 9 fl oz = 266,16 ml
- 10 fl oz = 295,74 ml
- 11 fl oz = 325,31 ml
- 12 fl oz = 354,88 ml
- 13 fl oz = 384,46 ml
- 14 fl oz = 414,03 ml
- 15 fl oz = 443,6 ml
- 16 fl oz = 473,18 ml
- 17 fl oz = 502,75 ml
- 18 fl oz = 532,32 ml
- 19 fl oz = 561,9 ml
- 20 fl oz = 591,47 ml
- 21 fl oz = 621,04 ml
- 22 fl oz = 650,62 ml
- 23 fl oz = 680,19 ml
- 24 fl oz = 709,76 ml
- 25 fl oz = 739,34 ml
- 26 fl oz = 768,91 ml
- 27 fl oz = 798,49 ml
- 28 fl oz = 828,06 ml
- 29 fl oz = 857,63 ml
- 30 fl oz = 887,21 ml
- 31 fl oz = 916,78 ml
- 32 fl oz = 946,35 ml
- 33 fl oz = 975,93 ml
- 34 fl oz = 1.005,5 ml
- 35 fl oz = 1.035,07 ml
- 36 fl oz = 1.064,65 ml
- 37 fl oz = 1.094,22 ml
- 38 fl oz = 1.123,79 ml
- 39 fl oz = 1.153,37 ml
- 40 fl oz = 1.182,94 ml
- 41 fl oz = 1.212,51 ml
- 42 fl oz = 1.242,09 ml
- 43 fl oz = 1.271,66 ml
- 44 fl oz = 1.301,24 ml
- 45 fl oz = 1.330,81 ml
- 46 fl oz = 1.360,38 ml
- 47 fl oz = 1.389,96 ml
- 48 fl oz = 1.419,53 ml
- 49 fl oz = 1.449,1 ml
- 50 fl oz = 1.478,68 ml
- 51 fl oz = 1.508,25 ml
- 52 fl oz = 1.537,82 ml
- 53 fl oz = 1.567,4 ml
- 54 fl oz = 1.596,97 ml
- 55 fl oz = 1.626,54 ml
- 56 fl oz = 1.656,12 ml
- 57 fl oz = 1.685,69 ml
- 58 fl oz = 1.715,26 ml
- 59 fl oz = 1.744,84 ml
- 60 fl oz = 1.774,41 ml
- 61 fl oz = 1.803,99 ml
- 62 fl oz = 1.833,56 ml
- 63 fl oz = 1.863,13 ml
- 64 fl oz = 1.892,71 ml
- 65 fl oz = 1.922,28 ml
- 66 fl oz = 1.951,85 ml
- 67 fl oz = 1.981,43 ml
- 68 fl oz = 2.011 ml
- 69 fl oz = 2.040,57 ml
- 70 fl oz = 2.070,15 ml
- 71 fl oz = 2.099,72 ml
- 72 fl oz = 2.129,29 ml
- 73 fl oz = 2.158,87 ml
- 74 fl oz = 2.188,44 ml
- 75 fl oz = 2.218,01 ml
- 76 fl oz = 2.247,59 ml
- 77 fl oz = 2.277,16 ml
- 78 fl oz = 2.306,74 ml
- 79 fl oz = 2.336,31 ml
- 80 fl oz = 2.365,88 ml
- 81 fl oz = 2.395,46 ml
- 82 fl oz = 2.425,03 ml
- 83 fl oz = 2.454,6 ml
- 84 fl oz = 2.484,18 ml
- 85 fl oz = 2.513,75 ml
- 86 fl oz = 2.543,32 ml
- 87 fl oz = 2.572,9 ml
- 88 fl oz = 2.602,47 ml
- 89 fl oz = 2.632,04 ml
- 90 fl oz = 2.661,62 ml
- 91 fl oz = 2.691,19 ml
- 92 fl oz = 2.720,76 ml
- 93 fl oz = 2.750,34 ml
- 94 fl oz = 2.779,91 ml
- 95 fl oz = 2.809,49 ml
- 96 fl oz = 2.839,06 ml
- 97 fl oz = 2.868,63 ml
- 98 fl oz = 2.898,21 ml
- 99 fl oz = 2.927,78 ml
- 100 fl oz = 2.957,35 ml
- 101 fl oz = 2.986,93 ml
- 102 fl oz = 3.016,5 ml
- 103 fl oz = 3.046,07 ml
- 104 fl oz = 3.075,65 ml
- 105 fl oz = 3.105,22 ml
- 106 fl oz = 3.134,79 ml
- 107 fl oz = 3.164,37 ml
- 108 fl oz = 3.193,94 ml
- 109 fl oz = 3.223,51 ml
- 110 fl oz = 3.253,09 ml
- 111 fl oz = 3.282,66 ml
- 112 fl oz = 3.312,24 ml
- 113 fl oz = 3.341,81 ml
- 114 fl oz = 3.371,38 ml
- 115 fl oz = 3.400,96 ml
- 116 fl oz = 3.430,53 ml
- 117 fl oz = 3.460,1 ml
- 118 fl oz = 3.489,68 ml
- 119 fl oz = 3.519,25 ml
- 120 fl oz = 3.548,82 ml
- 121 fl oz = 3.578,4 ml
- 122 fl oz = 3.607,97 ml
- 123 fl oz = 3.637,54 ml
- 124 fl oz = 3.667,12 ml
- 125 fl oz = 3.696,69 ml
- 126 fl oz = 3.726,26 ml
- 127 fl oz = 3.755,84 ml
- 128 fl oz = 3.785,41 ml
- 129 fl oz = 3.814,99 ml
- 130 fl oz = 3.844,56 ml
- 131 fl oz = 3.874,13 ml
- 132 fl oz = 3.903,71 ml
- 133 fl oz = 3.933,28 ml
- 134 fl oz = 3.962,85 ml
- 135 fl oz = 3.992,43 ml
- 136 fl oz = 4.022 ml
- 137 fl oz = 4.051,57 ml
- 138 fl oz = 4.081,15 ml
- 139 fl oz = 4.110,72 ml
- 140 fl oz = 4.140,29 ml
- 141 fl oz = 4.169,87 ml
- 142 fl oz = 4.199,44 ml
- 143 fl oz = 4.229,01 ml
- 144 fl oz = 4.258,59 ml
- 145 fl oz = 4.288,16 ml
- 146 fl oz = 4.317,74 ml
- 147 fl oz = 4.347,31 ml
- 148 fl oz = 4.376,88 ml
- 149 fl oz = 4.406,46 ml
- 150 fl oz = 4.436,03 ml
- 151 fl oz = 4.465,6 ml
- 152 fl oz = 4.495,18 ml
- 153 fl oz = 4.524,75 ml
- 154 fl oz = 4.554,32 ml
- 155 fl oz = 4.583,9 ml
- 156 fl oz = 4.613,47 ml
- 157 fl oz = 4.643,04 ml
- 158 fl oz = 4.672,62 ml
- 159 fl oz = 4.702,19 ml
- 160 fl oz = 4.731,76 ml
- 161 fl oz = 4.761,34 ml
- 162 fl oz = 4.790,91 ml
- 163 fl oz = 4.820,49 ml
- 164 fl oz = 4.850,06 ml
- 165 fl oz = 4.879,63 ml
- 166 fl oz = 4.909,21 ml
- 167 fl oz = 4.938,78 ml
- 168 fl oz = 4.968,35 ml
- 169 fl oz = 4.997,93 ml
- 170 fl oz = 5.027,5 ml
- 171 fl oz = 5.057,07 ml
- 172 fl oz = 5.086,65 ml
- 173 fl oz = 5.116,22 ml
- 174 fl oz = 5.145,79 ml
- 175 fl oz = 5.175,37 ml
- 176 fl oz = 5.204,94 ml
- 177 fl oz = 5.234,51 ml
- 178 fl oz = 5.264,09 ml
- 179 fl oz = 5.293,66 ml
- 180 fl oz = 5.323,24 ml
- 181 fl oz = 5.352,81 ml
- 182 fl oz = 5.382,38 ml
- 183 fl oz = 5.411,96 ml
- 184 fl oz = 5.441,53 ml
- 185 fl oz = 5.471,1 ml
- 186 fl oz = 5.500,68 ml
- 187 fl oz = 5.530,25 ml
- 188 fl oz = 5.559,82 ml
- 189 fl oz = 5.589,4 ml
- 190 fl oz = 5.618,97 ml
- 191 fl oz = 5.648,54 ml
- 192 fl oz = 5.678,12 ml
- 193 fl oz = 5.707,69 ml
- 194 fl oz = 5.737,26 ml
- 195 fl oz = 5.766,84 ml
- 196 fl oz = 5.796,41 ml
- 197 fl oz = 5.825,99 ml
- 198 fl oz = 5.855,56 ml
- 199 fl oz = 5.885,13 ml
- 200 fl oz = 5.914,71 ml
- 205 fl oz = 6.062,57 ml
- 210 fl oz = 6.210,44 ml
- 215 fl oz = 6.358,31 ml
- 220 fl oz = 6.506,18 ml
- 225 fl oz = 6.654,04 ml
- 230 fl oz = 6.801,91 ml
- 235 fl oz = 6.949,78 ml
- 240 fl oz = 7.097,65 ml
- 245 fl oz = 7.245,51 ml
- 250 fl oz = 7.393,38 ml
- 255 fl oz = 7.541,25 ml
- 260 fl oz = 7.689,12 ml
- 265 fl oz = 7.836,99 ml
- 270 fl oz = 7.984,85 ml
- 275 fl oz = 8.132,72 ml
- 280 fl oz = 8.280,59 ml
- 285 fl oz = 8.428,46 ml
- 290 fl oz = 8.576,32 ml
- 295 fl oz = 8.724,19 ml
- 300 fl oz = 8.872,06 ml
- 305 fl oz = 9.019,93 ml
- 310 fl oz = 9.167,79 ml
- 315 fl oz = 9.315,66 ml
- 320 fl oz = 9.463,53 ml
- 325 fl oz = 9.611,4 ml
- 330 fl oz = 9.759,26 ml
- 335 fl oz = 9.907,13 ml
- 340 fl oz = 10.055 ml
- 345 fl oz = 10.202,87 ml
- 350 fl oz = 10.350,74 ml
- 355 fl oz = 10.498,6 ml
- 360 fl oz = 10.646,47 ml
- 365 fl oz = 10.794,34 ml
- 370 fl oz = 10.942,21 ml
- 375 fl oz = 11.090,07 ml
- 380 fl oz = 11.237,94 ml
- 385 fl oz = 11.385,81 ml
- 390 fl oz = 11.533,68 ml
- 395 fl oz = 11.681,54 ml
- 400 fl oz = 11.829,41 ml
- 405 fl oz = 11.977,28 ml
- 410 fl oz = 12.125,15 ml
- 415 fl oz = 12.273,01 ml
- 420 fl oz = 12.420,88 ml
- 425 fl oz = 12.568,75 ml
- 430 fl oz = 12.716,62 ml
- 435 fl oz = 12.864,49 ml
- 440 fl oz = 13.012,35 ml
- 445 fl oz = 13.160,22 ml
- 450 fl oz = 13.308,09 ml
- 455 fl oz = 13.455,96 ml
- 460 fl oz = 13.603,82 ml
- 465 fl oz = 13.751,69 ml
- 470 fl oz = 13.899,56 ml
- 475 fl oz = 14.047,43 ml
- 480 fl oz = 14.195,29 ml
- 485 fl oz = 14.343,16 ml
- 490 fl oz = 14.491,03 ml
- 495 fl oz = 14.638,9 ml
- 500 fl oz = 14.786,76 ml
- 510 fl oz = 15.082,5 ml
- 520 fl oz = 15.378,24 ml
- 530 fl oz = 15.673,97 ml
- 540 fl oz = 15.969,71 ml
- 550 fl oz = 16.265,44 ml
- 560 fl oz = 16.561,18 ml
- 570 fl oz = 16.856,91 ml
- 580 fl oz = 17.152,65 ml
- 590 fl oz = 17.448,38 ml
- 600 fl oz = 17.744,12 ml
- 610 fl oz = 18.039,85 ml
- 620 fl oz = 18.335,59 ml
- 630 fl oz = 18.631,32 ml
- 640 fl oz = 18.927,06 ml
- 650 fl oz = 19.222,79 ml
- 660 fl oz = 19.518,53 ml
- 670 fl oz = 19.814,26 ml
- 680 fl oz = 20.110 ml
- 690 fl oz = 20.405,74 ml
- 700 fl oz = 20.701,47 ml
- 710 fl oz = 20.997,21 ml
- 720 fl oz = 21.292,94 ml
- 730 fl oz = 21.588,68 ml
- 740 fl oz = 21.884,41 ml
- 750 fl oz = 22.180,15 ml
- 760 fl oz = 22.475,88 ml
- 770 fl oz = 22.771,62 ml
- 780 fl oz = 23.067,35 ml
- 790 fl oz = 23.363,09 ml
- 800 fl oz = 23.658,82 ml
- 810 fl oz = 23.954,56 ml
- 820 fl oz = 24.250,29 ml
- 830 fl oz = 24.546,03 ml
- 840 fl oz = 24.841,76 ml
- 850 fl oz = 25.137,5 ml
- 860 fl oz = 25.433,24 ml
- 870 fl oz = 25.728,97 ml
- 880 fl oz = 26.024,71 ml
- 890 fl oz = 26.320,44 ml
- 900 fl oz = 26.616,18 ml
- 910 fl oz = 26.911,91 ml
- 920 fl oz = 27.207,65 ml
- 930 fl oz = 27.503,38 ml
- 940 fl oz = 27.799,12 ml
- 950 fl oz = 28.094,85 ml
- 960 fl oz = 28.390,59 ml
- 970 fl oz = 28.686,32 ml
- 980 fl oz = 28.982,06 ml
- 990 fl oz = 29.277,79 ml
- 1.000 fl oz = 29.573,53 ml
- 1.025 fl oz = 30.312,87 ml
- 1.050 fl oz = 31.052,21 ml
- 1.075 fl oz = 31.791,54 ml
- 1.100 fl oz = 32.530,88 ml
- 1.125 fl oz = 33.270,22 ml
- 1.150 fl oz = 34.009,56 ml
- 1.175 fl oz = 34.748,9 ml
- 1.200 fl oz = 35.488,24 ml
- 1.225 fl oz = 36.227,57 ml
- 1.250 fl oz = 36.966,91 ml
- 1.275 fl oz = 37.706,25 ml
- 1.300 fl oz = 38.445,59 ml
- 1.325 fl oz = 39.184,93 ml
- 1.350 fl oz = 39.924,26 ml
- 1.375 fl oz = 40.663,6 ml
- 1.400 fl oz = 41.402,94 ml
- 1.425 fl oz = 42.142,28 ml
- 1.450 fl oz = 42.881,62 ml
- 1.475 fl oz = 43.620,96 ml
- 1.500 fl oz = 44.360,29 ml
- 1.525 fl oz = 45.099,63 ml
- 1.550 fl oz = 45.838,97 ml
- 1.575 fl oz = 46.578,31 ml
- 1.600 fl oz = 47.317,65 ml
- 1.625 fl oz = 48.056,99 ml
- 1.650 fl oz = 48.796,32 ml
- 1.675 fl oz = 49.535,66 ml
- 1.700 fl oz = 50.275 ml
- 1.725 fl oz = 51.014,34 ml
- 1.750 fl oz = 51.753,68 ml
- 1.775 fl oz = 52.493,01 ml
- 1.800 fl oz = 53.232,35 ml
- 1.825 fl oz = 53.971,69 ml
- 1.850 fl oz = 54.711,03 ml
- 1.875 fl oz = 55.450,37 ml
- 1.900 fl oz = 56.189,71 ml
- 1.925 fl oz = 56.929,04 ml
- 1.950 fl oz = 57.668,38 ml
- 1.975 fl oz = 58.407,72 ml
- 2.000 fl oz = 59.147,06 ml
- 2.050 fl oz = 60.625,74 ml
- 2.100 fl oz = 62.104,41 ml
- 2.150 fl oz = 63.583,09 ml
- 2.200 fl oz = 65.061,77 ml
- 2.250 fl oz = 66.540,44 ml
- 2.300 fl oz = 68.019,12 ml
- 2.350 fl oz = 69.497,79 ml
- 2.400 fl oz = 70.976,47 ml
- 2.450 fl oz = 72.455,15 ml
- 2.500 fl oz = 73.933,82 ml
- 2.550 fl oz = 75.412,5 ml
- 2.600 fl oz = 76.891,18 ml
- 2.650 fl oz = 78.369,85 ml
- 2.700 fl oz = 79.848,53 ml
- 2.750 fl oz = 81.327,21 ml
- 2.800 fl oz = 82.805,88 ml
- 2.850 fl oz = 84.284,56 ml
- 2.900 fl oz = 85.763,24 ml
- 2.950 fl oz = 87.241,91 ml
- 3.000 fl oz = 88.720,59 ml
- 3.050 fl oz = 90.199,27 ml
- 3.100 fl oz = 91.677,94 ml
- 3.150 fl oz = 93.156,62 ml
- 3.200 fl oz = 94.635,29 ml
- 3.250 fl oz = 96.113,97 ml
- 3.300 fl oz = 97.592,65 ml
- 3.350 fl oz = 99.071,32 ml
- 3.400 fl oz = 100.550 ml
- 3.450 fl oz = 102.028,68 ml
- 3.500 fl oz = 103.507,35 ml
- 3.550 fl oz = 104.986,03 ml
- 3.600 fl oz = 106.464,71 ml
- 3.650 fl oz = 107.943,38 ml
- 3.700 fl oz = 109.422,06 ml
- 3.750 fl oz = 110.900,74 ml
- 3.800 fl oz = 112.379,41 ml
- 3.850 fl oz = 113.858,09 ml
- 3.900 fl oz = 115.336,77 ml
- 3.950 fl oz = 116.815,44 ml
- 4.000 fl oz = 118.294,12 ml
- 4.050 fl oz = 119.772,79 ml
- 4.100 fl oz = 121.251,47 ml
- 4.150 fl oz = 122.730,15 ml
- 4.200 fl oz = 124.208,82 ml
- 4.250 fl oz = 125.687,5 ml
- 4.300 fl oz = 127.166,18 ml
- 4.350 fl oz = 128.644,85 ml
- 4.400 fl oz = 130.123,53 ml
- 4.450 fl oz = 131.602,21 ml
- 4.500 fl oz = 133.080,88 ml
- 4.550 fl oz = 134.559,56 ml
- 4.600 fl oz = 136.038,24 ml
- 4.650 fl oz = 137.516,91 ml
- 4.700 fl oz = 138.995,59 ml
- 4.750 fl oz = 140.474,27 ml
- 4.800 fl oz = 141.952,94 ml
- 4.850 fl oz = 143.431,62 ml
- 4.900 fl oz = 144.910,29 ml
- 4.950 fl oz = 146.388,97 ml
- 5.000 fl oz = 147.867,65 ml
- 5.100 fl oz = 150.825 ml
- 5.200 fl oz = 153.782,35 ml
- 5.300 fl oz = 156.739,71 ml
- 5.400 fl oz = 159.697,06 ml
- 5.500 fl oz = 162.654,41 ml
- 5.600 fl oz = 165.611,77 ml
- 5.700 fl oz = 168.569,12 ml
- 5.800 fl oz = 171.526,47 ml
- 5.900 fl oz = 174.483,82 ml
- 6.000 fl oz = 177.441,18 ml
- 6.100 fl oz = 180.398,53 ml
- 6.200 fl oz = 183.355,88 ml
- 6.300 fl oz = 186.313,24 ml
- 6.400 fl oz = 189.270,59 ml
- 6.500 fl oz = 192.227,94 ml
- 6.600 fl oz = 195.185,3 ml
- 6.700 fl oz = 198.142,65 ml
- 6.800 fl oz = 201.100 ml
- 6.900 fl oz = 204.057,35 ml
- 7.000 fl oz = 207.014,71 ml
- 7.100 fl oz = 209.972,06 ml
- 7.200 fl oz = 212.929,41 ml
- 7.300 fl oz = 215.886,77 ml
- 7.400 fl oz = 218.844,12 ml
- 7.500 fl oz = 221.801,47 ml
- 7.600 fl oz = 224.758,82 ml
- 7.700 fl oz = 227.716,18 ml
- 7.800 fl oz = 230.673,53 ml
- 7.900 fl oz = 233.630,88 ml
- 8.000 fl oz = 236.588,24 ml
- 8.100 fl oz = 239.545,59 ml
- 8.200 fl oz = 242.502,94 ml
- 8.300 fl oz = 245.460,3 ml
- 8.400 fl oz = 248.417,65 ml
- 8.500 fl oz = 251.375 ml
- 8.600 fl oz = 254.332,35 ml
- 8.700 fl oz = 257.289,71 ml
- 8.800 fl oz = 260.247,06 ml
- 8.900 fl oz = 263.204,41 ml
- 9.000 fl oz = 266.161,77 ml
- 9.100 fl oz = 269.119,12 ml
- 9.200 fl oz = 272.076,47 ml
- 9.300 fl oz = 275.033,82 ml
- 9.400 fl oz = 277.991,18 ml
- 9.500 fl oz = 280.948,53 ml
- 9.600 fl oz = 283.905,88 ml
- 9.700 fl oz = 286.863,24 ml
- 9.800 fl oz = 289.820,59 ml
- 9.900 fl oz = 292.777,94 ml
- 10.000 fl oz = 295.735,3 ml
De Amerikaanse fluid ounce is precies 29,5735295625 ml, bepaald als 1/128 Amerikaanse gallon. De imperiale fluid ounce is 28,4130625 ml, oftewel 1/160 imperiale gallon. Methode en bronnen.
Veelgestelde vragen
Amerikaanse of imperiale fluid ounce?
De Amerikaanse is 29,57 ml, de imperiale 28,41 ml, zo'n 4% minder. Amerikaanse recepten en dranken gebruiken de eerste; in het Verenigd Koninkrijk staan etiketten al jaren in milliliter en overleeft de fluid ounce vooral in de spreektaal.
Is een fluid ounce hetzelfde als een ounce gewicht?
Nee, en daar zit de valkuil. De ounce van gewicht is 28,35 gram, de fluid ounce 29,57 milliliter. De getallen lijken op elkaar maar meten verschillende grootheden; ze vallen alleen bij water ruwweg samen.
Hoeveel milliliter is een Amerikaans blikje?
12 fl oz, dus 354,9 ml, op het etiket meestal afgerond naar 355 ml. Het gewone Europese blikje is 330 ml, iets minder; de versie van 500 ml komt overeen met 16,9 fl oz.
Waarom staat er op een Amerikaans etiket 240 ml voor 8 fl oz?
Omdat de Amerikaanse voedingswaarde-etikettering de fluid ounce als een ronde 30 ml telt. De referentieportie voor dranken is op 240 ml gezet en wordt als 8 fl oz gedrukt, terwijl acht exacte ounces op 236,6 ml uitkomen. Het verschil van 1,4% staat in de regels en is geen drukfout.
Waar komt het verschil tussen de Amerikaanse en de imperiale ounce vandaan?
Van twee ongerelateerde gallons. De Amerikaanse gallon zet de wine gallon van 1707 voort, bepaald op 231 kubieke inch. De imperiale gallon van 1824 is het volume van tien pond water, zodat een imperiale fluid ounce water vrijwel precies één avoirdupois ounce weegt: 28,41 ml tegenover 28,35 g. Dat samenvallen van volume en gewicht werkt alleen met de Britse ounce.