Calculate gross and net tonnage per International Tonnage Convention (ITC 69)
Input Parameters
Results
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Enclosed Volume
m³
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Gross Tonnage
GT
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Net Tonnage
NT
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Measurement Standard
Reference
ITC 1969 Tonnage:
GT = K1 × V, where K1 = 0.2 + 0.02 × log10(V)
NT ≥ 0.3 × GT
V = total enclosed volume in m³
1 GT ≠ 1 ton weight; tonnage is a volume measure