1. What is a Vessel Gross Tonnage Calculator?

Definition: This calculator estimates the gross tonnage of a vessel based on its total volume and a coefficient.

Purpose: It helps shipbuilders, naval architects, and maritime professionals determine a vessel's size for registration, regulations, and fees.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( GT \) — Gross tonnage (unitless)
• \( K \) — Coefficient (typically 0.2–0.3)
• \( V \) — Total enclosed volume of the vessel (m³)

Explanation: The gross tonnage is calculated by multiplying the vessel's total enclosed volume by a coefficient that accounts for the vessel's type and configuration.

3. Importance of Gross Tonnage Calculation

Details: Gross tonnage determines registration fees, safety regulations, manning requirements, and port dues for vessels.

4. Using the Calculator

Tips: Enter the coefficient (default 0.2) and total enclosed volume in cubic meters. The coefficient must be between 0.2 and 0.3, and volume must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between gross and net tonnage?
A: Gross tonnage includes all enclosed spaces, while net tonnage only includes revenue-generating spaces.

Q2: How do I determine the coefficient (K)?
A: The coefficient depends on vessel type - 0.2 for cargo ships, up to 0.3 for passenger vessels with many enclosed spaces.

Q3: Where do I find the vessel's total volume?
A: This is calculated from the vessel's design plans by naval architects.

Q4: Why is gross tonnage unitless?
A: It's a measurement of volume capacity, not weight, using a standardized formula for comparison purposes.

Q5: How accurate is this calculation?
A: This provides an estimate. Official tonnage calculations follow strict measurement rules and are performed by certified professionals.