| 0GRT | 0 ac⋅ft |
| 1GRT | 0.002295684114 ac⋅ft |
| 2GRT | 0.004591368228 ac⋅ft |
| 3GRT | 0.006887052342 ac⋅ft |
| 4GRT | 0.009182736455 ac⋅ft |
| 5GRT | 0.01147842057 ac⋅ft |
| 6GRT | 0.01377410468 ac⋅ft |
| 7GRT | 0.0160697888 ac⋅ft |
| 8GRT | 0.01836547291 ac⋅ft |
| 9GRT | 0.02066115702 ac⋅ft |
| 10GRT | 0.02295684114 ac⋅ft |
| 11GRT | 0.02525252525 ac⋅ft |
| 12GRT | 0.02754820937 ac⋅ft |
| 13GRT | 0.02984389348 ac⋅ft |
| 14GRT | 0.03213957759 ac⋅ft |
| 15GRT | 0.03443526171 ac⋅ft |
| 16GRT | 0.03673094582 ac⋅ft |
| 17GRT | 0.03902662994 ac⋅ft |
| 18GRT | 0.04132231405 ac⋅ft |
| 19GRT | 0.04361799816 ac⋅ft |
| 20GRT | 0.04591368228 ac⋅ft |
| 21GRT | 0.04820936639 ac⋅ft |
| 22GRT | 0.05050505051 ac⋅ft |
| 23GRT | 0.05280073462 ac⋅ft |
| 24GRT | 0.05509641873 ac⋅ft |
| 25GRT | 0.05739210285 ac⋅ft |
| 26GRT | 0.05968778696 ac⋅ft |
| 27GRT | 0.06198347107 ac⋅ft |
| 28GRT | 0.06427915519 ac⋅ft |
| 29GRT | 0.0665748393 ac⋅ft |
| 30GRT | 0.06887052342 ac⋅ft |
| 31GRT | 0.07116620753 ac⋅ft |
| 32GRT | 0.07346189164 ac⋅ft |
| 33GRT | 0.07575757576 ac⋅ft |
| 34GRT | 0.07805325987 ac⋅ft |
| 35GRT | 0.08034894399 ac⋅ft |
| 36GRT | 0.0826446281 ac⋅ft |
| 37GRT | 0.08494031221 ac⋅ft |
| 38GRT | 0.08723599633 ac⋅ft |
| 39GRT | 0.08953168044 ac⋅ft |
| 40GRT | 0.09182736455 ac⋅ft |
| 41GRT | 0.09412304867 ac⋅ft |
| 42GRT | 0.09641873278 ac⋅ft |
| 43GRT | 0.0987144169 ac⋅ft |
| 44GRT | 0.101010101 ac⋅ft |
| 45GRT | 0.1033057851 ac⋅ft |
| 46GRT | 0.1056014692 ac⋅ft |
| 47GRT | 0.1078971534 ac⋅ft |
| 48GRT | 0.1101928375 ac⋅ft |
| 49GRT | 0.1124885216 ac⋅ft |
| 50GRT | 0.1147842057 ac⋅ft |
| 51GRT | 0.1170798898 ac⋅ft |
| 52GRT | 0.1193755739 ac⋅ft |
| 53GRT | 0.121671258 ac⋅ft |
| 54GRT | 0.1239669421 ac⋅ft |
| 55GRT | 0.1262626263 ac⋅ft |
| 56GRT | 0.1285583104 ac⋅ft |
| 57GRT | 0.1308539945 ac⋅ft |
| 58GRT | 0.1331496786 ac⋅ft |
| 59GRT | 0.1354453627 ac⋅ft |
| 60GRT | 0.1377410468 ac⋅ft |
| 61GRT | 0.1400367309 ac⋅ft |
| 62GRT | 0.1423324151 ac⋅ft |
| 63GRT | 0.1446280992 ac⋅ft |
| 64GRT | 0.1469237833 ac⋅ft |
| 65GRT | 0.1492194674 ac⋅ft |
| 66GRT | 0.1515151515 ac⋅ft |
| 67GRT | 0.1538108356 ac⋅ft |
| 68GRT | 0.1561065197 ac⋅ft |
| 69GRT | 0.1584022039 ac⋅ft |
| 70GRT | 0.160697888 ac⋅ft |
| 71GRT | 0.1629935721 ac⋅ft |
| 72GRT | 0.1652892562 ac⋅ft |
| 73GRT | 0.1675849403 ac⋅ft |
| 74GRT | 0.1698806244 ac⋅ft |
| 75GRT | 0.1721763085 ac⋅ft |
| 76GRT | 0.1744719927 ac⋅ft |
| 77GRT | 0.1767676768 ac⋅ft |
| 78GRT | 0.1790633609 ac⋅ft |
| 79GRT | 0.181359045 ac⋅ft |
| 80GRT | 0.1836547291 ac⋅ft |
| 81GRT | 0.1859504132 ac⋅ft |
| 82GRT | 0.1882460973 ac⋅ft |
| 83GRT | 0.1905417815 ac⋅ft |
| 84GRT | 0.1928374656 ac⋅ft |
| 85GRT | 0.1951331497 ac⋅ft |
| 86GRT | 0.1974288338 ac⋅ft |
| 87GRT | 0.1997245179 ac⋅ft |
| 88GRT | 0.202020202 ac⋅ft |
| 89GRT | 0.2043158861 ac⋅ft |
| 90GRT | 0.2066115702 ac⋅ft |
| 91GRT | 0.2089072544 ac⋅ft |
| 92GRT | 0.2112029385 ac⋅ft |
| 93GRT | 0.2134986226 ac⋅ft |
| 94GRT | 0.2157943067 ac⋅ft |
| 95GRT | 0.2180899908 ac⋅ft |
| 96GRT | 0.2203856749 ac⋅ft |
| 97GRT | 0.222681359 ac⋅ft |
| 98GRT | 0.2249770432 ac⋅ft |
| 99GRT | 0.2272727273 ac⋅ft |
The register ton is a unit of volume in the shipping world and uses the symbol GRT.
1 register ton is equal to 100 ft³ or 2.832 m³.
The register ton is used in shipping to measure the amount of cargo on a vessel. The phrase is often mistaken for a unit of mass or weight because of the term 'ton' but should not be confused.
The acre-foot is a unit of volume in the US customary unit system with the symbol ac⋅ft.
It represents the volume contained in a box measuring 660 feet long, 66 feet wide and 1 foot deep. This can be thought of a box the size of an acre but 1 foot deep.
It is approximately the same volume as an 8 lane swimming pool; 25 metres in length, 3 metres deep and 16 metres wide (assuming lanes are 2 metres wide).
It is still used in the US despite its links to the much-outdated imperial system of units. For example a "rule of thumb" is that an average suburban family's annual water usage should be around 1 acre-foot. This is equal to just under 3.4 m³ daily.