Home
Back
Gross Tonnage Formula:
| From: | To: |
Gross Tonnage is a measure of a ship's total internal volume, calculated based on the vessel's length, breadth, and depth. It represents the overall size of the vessel and is used for regulatory purposes, port dues, and safety regulations.
The calculator uses the Gross Tonnage formula:
Where:
Explanation: This formula calculates the approximate gross tonnage by taking half the product of the vessel's three main dimensions and dividing by 100 to convert to tons.
Details: Gross Tonnage is crucial for determining port fees, regulatory compliance, safety requirements, and vessel classification. It serves as a standard measurement for maritime authorities worldwide.
Tips: Enter the vessel's length, breadth, and depth in feet. All values must be positive numbers. The calculator will provide the gross tonnage measurement in tons.
Q1: What's the difference between gross tonnage and net tonnage?
A: Gross tonnage measures total internal volume, while net tonnage measures volume of cargo spaces only (gross tonnage minus non-cargo spaces).
Q2: Is this formula applicable to all types of vessels?
A: This simplified formula provides an approximate calculation. Official tonnage measurements may use more complex formulas specific to vessel types.
Q3: Why is gross tonnage important for boat owners?
A: It determines registration requirements, safety equipment needed, crew requirements, and port fee calculations.
Q4: How accurate is this calculation method?
A: This provides a good estimate, but official tonnage certification requires precise measurements by certified surveyors using standardized methods.
Q5: Can this formula be used for international registration?
A: While this gives an approximation, official international registration requires certified tonnage measurements following International Maritime Organization standards.