| 0GRT | 0pk |
| 1GRT | 321.425582pk |
| 2GRT | 642.851164pk |
| 3GRT | 964.2767459pk |
| 4GRT | 1,285.702328pk |
| 5GRT | 1,607.12791pk |
| 6GRT | 1,928.553492pk |
| 7GRT | 2,249.979074pk |
| 8GRT | 2,571.404656pk |
| 9GRT | 2,892.830238pk |
| 10GRT | 3,214.25582pk |
| 11GRT | 3,535.681402pk |
| 12GRT | 3,857.106984pk |
| 13GRT | 4,178.532566pk |
| 14GRT | 4,499.958148pk |
| 15GRT | 4,821.38373pk |
| 16GRT | 5,142.809312pk |
| 17GRT | 5,464.234894pk |
| 18GRT | 5,785.660476pk |
| 19GRT | 6,107.086058pk |
| 20GRT | 6,428.51164pk |
| 21GRT | 6,749.937222pk |
| 22GRT | 7,071.362804pk |
| 23GRT | 7,392.788386pk |
| 24GRT | 7,714.213968pk |
| 25GRT | 8,035.639549pk |
| 26GRT | 8,357.065131pk |
| 27GRT | 8,678.490713pk |
| 28GRT | 8,999.916295pk |
| 29GRT | 9,321.341877pk |
| 30GRT | 9,642.767459pk |
| 31GRT | 9,964.193041pk |
| 32GRT | 10,285.61862pk |
| 33GRT | 10,607.04421pk |
| 34GRT | 10,928.46979pk |
| 35GRT | 11,249.89537pk |
| 36GRT | 11,571.32095pk |
| 37GRT | 11,892.74653pk |
| 38GRT | 12,214.17212pk |
| 39GRT | 12,535.5977pk |
| 40GRT | 12,857.02328pk |
| 41GRT | 13,178.44886pk |
| 42GRT | 13,499.87444pk |
| 43GRT | 13,821.30003pk |
| 44GRT | 14,142.72561pk |
| 45GRT | 14,464.15119pk |
| 46GRT | 14,785.57677pk |
| 47GRT | 15,107.00235pk |
| 48GRT | 15,428.42794pk |
| 49GRT | 15,749.85352pk |
| 50GRT | 16,071.2791pk |
| 51GRT | 16,392.70468pk |
| 52GRT | 16,714.13026pk |
| 53GRT | 17,035.55584pk |
| 54GRT | 17,356.98143pk |
| 55GRT | 17,678.40701pk |
| 56GRT | 17,999.83259pk |
| 57GRT | 18,321.25817pk |
| 58GRT | 18,642.68375pk |
| 59GRT | 18,964.10934pk |
| 60GRT | 19,285.53492pk |
| 61GRT | 19,606.9605pk |
| 62GRT | 19,928.38608pk |
| 63GRT | 20,249.81166pk |
| 64GRT | 20,571.23725pk |
| 65GRT | 20,892.66283pk |
| 66GRT | 21,214.08841pk |
| 67GRT | 21,535.51399pk |
| 68GRT | 21,856.93957pk |
| 69GRT | 22,178.36516pk |
| 70GRT | 22,499.79074pk |
| 71GRT | 22,821.21632pk |
| 72GRT | 23,142.6419pk |
| 73GRT | 23,464.06748pk |
| 74GRT | 23,785.49307pk |
| 75GRT | 24,106.91865pk |
| 76GRT | 24,428.34423pk |
| 77GRT | 24,749.76981pk |
| 78GRT | 25,071.19539pk |
| 79GRT | 25,392.62098pk |
| 80GRT | 25,714.04656pk |
| 81GRT | 26,035.47214pk |
| 82GRT | 26,356.89772pk |
| 83GRT | 26,678.3233pk |
| 84GRT | 26,999.74889pk |
| 85GRT | 27,321.17447pk |
| 86GRT | 27,642.60005pk |
| 87GRT | 27,964.02563pk |
| 88GRT | 28,285.45121pk |
| 89GRT | 28,606.8768pk |
| 90GRT | 28,928.30238pk |
| 91GRT | 29,249.72796pk |
| 92GRT | 29,571.15354pk |
| 93GRT | 29,892.57912pk |
| 94GRT | 30,214.00471pk |
| 95GRT | 30,535.43029pk |
| 96GRT | 30,856.85587pk |
| 97GRT | 31,178.28145pk |
| 98GRT | 31,499.70703pk |
| 99GRT | 31,821.13262pk |
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 peck is a unit of volume in the US customary unit system. It uses the symbol pk.
1 US peck is equal to 1/4 of a US bushel. This is also equal to 2 US dry gallons, 8 US dry quarts or 16 US dry pints. In SI / metric, this equates to 8.809768 L.
Although the imperial peck is almost obsolete, it survives in some places in the USA - where some products (namely apples) are still sold by the peck.
It appears in the old English nursery rhyme; 'Peter Piper' where he 'picked a peck of pickled peppers'.