Gross Registered Tonnage (GRT) 
Estimator 

Gross Registered Tonnage (GRT) represents the total volume of a vessel. The GRT may be listed on the vessels Certificate of Operation or Registration. If unsure please use the guide below. (measurements are in metres) 

 

Please note this calculates an estimated GRT.  For exact GRT please refer to the vessels Certificate of Operation, Certificate of Registration or Condition Report.