1. What is a Barge Gross Tonnage Calculator?

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

Purpose: It helps marine professionals determine the gross tonnage for registration, fees, and regulations compliance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( GT \) — Gross tonnage (unitless)
• \( K \) — Coefficient (typically 0.2–0.3)
• \( V \) — Volume of enclosed spaces (cubic meters)

Explanation: The volume is multiplied by a coefficient that accounts for the vessel's type and construction.

3. Importance of Gross Tonnage Calculation

Details: Gross tonnage determines registration fees, safety regulations, crew requirements, and port dues.

4. Using the Calculator

Tips: Enter the coefficient (default 0.25) between 0.2-0.3 and the volume in cubic meters. All values 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 subtracts non-cargo spaces.

Q2: Why does the coefficient vary?
A: The coefficient depends on vessel type, construction, and enclosed space utilization.

Q3: How do I measure the volume?
A: Measure all enclosed spaces below deck and in superstructures, then sum their volumes.

Q4: Is this calculator valid for all vessels?
A: Primarily for barges. Other vessels may use different calculation methods.

Q5: Does this comply with international regulations?
A: This provides an estimate. Official tonnage requires certified measurement.