| imperial gallon | 1 gal (imp) | 2 gal (imp) | 3 gal (imp) | 4 gal (imp) | 5 gal (imp) | 6 gal (imp) | 7 gal (imp) | 8 gal (imp) | 9 gal (imp) | 10 gal (imp) | 11 gal (imp) | 12 gal (imp) | 13 gal (imp) | 14 gal (imp) | 15 gal (imp) | 16 gal (imp) | 17 gal (imp) | 18 gal (imp) | 19 gal (imp) | 20 gal (imp) | 21 gal (imp) | 22 gal (imp) | 23 gal (imp) | 24 gal (imp) | 25 gal (imp) | 26 gal (imp) | 27 gal (imp) | 28 gal (imp) | 29 gal (imp) | 30 gal (imp) | 31 gal (imp) | 32 gal (imp) | 33 gal (imp) | 34 gal (imp) | 35 gal (imp) | 36 gal (imp) | 37 gal (imp) | 38 gal (imp) | 39 gal (imp) | 40 gal (imp) | 41 gal (imp) | 42 gal (imp) | 43 gal (imp) | 44 gal (imp) | 45 gal (imp) | 46 gal (imp) | 47 gal (imp) | 48 gal (imp) | 49 gal (imp) | 50 gal (imp) | 51 gal (imp) | 52 gal (imp) | 53 gal (imp) | 54 gal (imp) | 55 gal (imp) | 56 gal (imp) | 57 gal (imp) | 58 gal (imp) | 59 gal (imp) | 60 gal (imp) | 61 gal (imp) | 62 gal (imp) | 63 gal (imp) | 64 gal (imp) | 65 gal (imp) | 66 gal (imp) | 67 gal (imp) | 68 gal (imp) | 69 gal (imp) | 70 gal (imp) | 71 gal (imp) | 72 gal (imp) | 73 gal (imp) | 74 gal (imp) | 75 gal (imp) | 76 gal (imp) | 77 gal (imp) | 78 gal (imp) | 79 gal (imp) | 80 gal (imp) | 81 gal (imp) | 82 gal (imp) | 83 gal (imp) | 84 gal (imp) | 85 gal (imp) | 86 gal (imp) | 87 gal (imp) | 88 gal (imp) | 89 gal (imp) | 90 gal (imp) | 91 gal (imp) | 92 gal (imp) | 93 gal (imp) | 94 gal (imp) | 95 gal (imp) | 96 gal (imp) | 97 gal (imp) | 98 gal (imp) | 99 gal (imp) | 100 gal (imp) |
| drop (imperial) | 46,080.0000000 gtt | 92,160.0000001 gtt | 138,240.0000001 gtt | 184,320.0000002 gtt | 230,400.0000002 gtt | 276,480.0000003 gtt | 322,560.0000003 gtt | 368,640.0000003 gtt | 414,720.0000004 gtt | 460,800.0000004 gtt | 506,880.0000005 gtt | 552,960.0000005 gtt | 599,040.0000005 gtt | 645,120.0000006 gtt | 691,200.0000006 gtt | 737,280.0000007 gtt | 783,360.0000007 gtt | 829,440.0000008 gtt | 875,520.0000008 gtt | 921,600.0000008 gtt | 967,680.0000009 gtt | 1,013,760.0000009 gtt | 1,059,840.000001 gtt | 1,105,920.000001 gtt | 1,152,000.000001 gtt | 1,198,080.0000011 gtt | 1,244,160.0000011 gtt | 1,290,240.0000012 gtt | 1,336,320.0000012 gtt | 1,382,400.0000012 gtt | 1,428,480.0000013 gtt | 1,474,560.0000013 gtt | 1,520,640.0000014 gtt | 1,566,720.0000014 gtt | 1,612,800.0000015 gtt | 1,658,880.0000015 gtt | 1,704,960.0000015 gtt | 1,751,040.0000016 gtt | 1,797,120.0000016 gtt | 1,843,200.0000017 gtt | 1,889,280.0000017 gtt | 1,935,360.0000017 gtt | 1,981,440.0000018 gtt | 2,027,520.0000018 gtt | 2,073,600.0000019 gtt | 2,119,680.0000019 gtt | 2,165,760.000002 gtt | 2,211,840.000002 gtt | 2,257,920.000002 gtt | 2,304,000.0000021 gtt | 2,350,080.0000021 gtt | 2,396,160.0000022 gtt | 2,442,240.0000022 gtt | 2,488,320.0000022 gtt | 2,534,400.0000023 gtt | 2,580,480.0000023 gtt | 2,626,560.0000024 gtt | 2,672,640.0000024 gtt | 2,718,720.0000024 gtt | 2,764,800.0000025 gtt | 2,810,880.0000025 gtt | 2,856,960.0000026 gtt | 2,903,040.0000026 gtt | 2,949,120.0000027 gtt | 2,995,200.0000027 gtt | 3,041,280.0000027 gtt | 3,087,360.0000028 gtt | 3,133,440.0000028 gtt | 3,179,520.0000029 gtt | 3,225,600.0000029 gtt | 3,271,680.0000029 gtt | 3,317,760.000003 gtt | 3,363,840.000003 gtt | 3,409,920.0000031 gtt | 3,456,000.0000031 gtt | 3,502,080.0000032 gtt | 3,548,160.0000032 gtt | 3,594,240.0000032 gtt | 3,640,320.0000033 gtt | 3,686,400.0000033 gtt | 3,732,480.0000034 gtt | 3,778,560.0000034 gtt | 3,824,640.0000034 gtt | 3,870,720.0000035 gtt | 3,916,800.0000035 gtt | 3,962,880.0000036 gtt | 4,008,960.0000036 gtt | 4,055,040.0000037 gtt | 4,101,120.0000037 gtt | 4,147,200.0000037 gtt | 4,193,280.0000038 gtt | 4,239,360.0000038 gtt | 4,285,440.0000039 gtt | 4,331,520.0000039 gtt | 4,377,600.0000039 gtt | 4,423,680.000004 gtt | 4,469,760.000004 gtt | 4,515,840.0000041 gtt | 4,561,920.0000041 gtt | 4,608,000.0000042 gtt |
The imperial (UK) gallon, now defined as exactly 4.54609 litres (about 277.42 cubic inches), is used in some Commonwealth countries and was originally based on the volume of 10 pounds (approximately 4.54 kg) of water at 62 °F (17 °C). The imperial fluid ounce is defined as 1⁄160 of an imperial gallon; there are four quarts in a gallon, two pints in a quart, and 20 Imperial fluid ounces in an imperial pint.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| imperial gallon | gal (imp) | ≡ 4.54609 L | ≡ 4.54609×10−3 m3 | Imperial/US |
| imperial gallons | drops (imperial) | imperial gallons | drops (imperial) |
|---|---|---|---|
| 1 | = 46080.000000042 | 6 | = 276480.00000025 |
| 2 | = 92160.000000083 | 7 | = 322560.00000029 |
| 3 | = 138240.00000012 | 8 | = 368640.00000033 |
| 4 | = 184320.00000017 | 9 | = 414720.00000037 |
| 5 | = 230400.00000021 | 10 | = 460800.00000042 |
The drop is an approximated unit of measure of volume, the amount dispensed as one drop from a dropper or drip chamber. It is often used in giving quantities of liquid drugs to patients, and occasionally in cooking.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| drop (imperial) | gtt | ≡ 1⁄288 fl oz (imp) | = 98.6564670138×10−9 m3 | Imperial/US |
| drops (imperial) | imperial gallons | drops (imperial) | imperial gallons |
|---|---|---|---|
| 1 | = 2.1701388888869E-5 | 6 | = 0.00013020833333322 |
| 2 | = 4.3402777777739E-5 | 7 | = 0.00015190972222209 |
| 3 | = 6.5104166666608E-5 | 8 | = 0.00017361111111095 |
| 4 | = 8.6805555555477E-5 | 9 | = 0.00019531249999982 |
| 5 | = 0.00010850694444435 | 10 | = 0.00021701388888869 |
| imperial gallons | drops (imperial) |
|---|---|
| 1 | = 46,080.0000000 |
| 2.1701388888869 × 10-5 | = 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 …) |