CARGO TOOLS

Cargo Calculators

Professional cargo calculators for stowage planning, deadweight calculations, VCG, grain stability, reefer operations and commercial freight.

8Calculators

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IMOStandards-based

All Cargo Calculators

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Stowage Factor Calculator

Calculate stowage factor for bulk cargo hold planning and cargo selection

Cargo

SF = Volume Occupied (m³ or ft³) ÷ Mass of Cargo (MT)

Volume (m³)Cargo Mass (MT)

Cargo Deadweight

Calculate available cargo deadweight based on vessel constants and consumables

Cargo

Cargo DWT = Displacement − Lightship − Stores − Bunkers − FW − Ballast

Displacement (MT)Lightship (MT)Stores (MT)Bunkers (MT)FW (MT)

Ullage to Volume

Convert tank ullage readings to liquid volume for cargo quantity determination

Liquid Cargo

Volume = Tank Capacity − (Ullage × Tank Cross-Section)

Tank Capacity (m³)Ullage (m)Tank Geometry

VCG Calculator

Calculate vertical centre of gravity from loading manifest for stability assessment

Stability

VCG = Σ(Mass × KG) ÷ Σ(Mass)

Mass (MT)KG (m)Item Description

Grain Heeling Moment

Calculate grain heeling moment and verify stability requirements per IMO

Grain

GHM = Volumetric Heeling Moment × Grain Density

Volumetric Heeling Moment (m⁴)Grain Density (MT/m³)SF

Reefer Capacity

Calculate refrigerated container capacity and electrical plug requirements

Reefer

Plug Load = Number of Reefers × kW per Unit

Number of ReeferskW per UnitGenerator Capacity (kW)

Bill of Lading Calculations

Calculate freight charges, gross weight, and measurement tonnage for B/L

Commercial

Freight = Max(W/M) × Rate | W/M = max(Gross Weight, Volume in m³)

Gross Weight (MT)Volume (m³)Freight Rate ($/W/M)

Container Weight Distribution

Calculate container stack weights and verify axle loads for road transport

Container

Stack Weight = Σ(Container Gross Weights) ≤ Max Stack Weight

Container Tare (kg)Cargo Weight (kg)Stack Limit (MT)

About Cargo Calculators

These cargo calculators assist cargo officers, chief officers, and port captains in day-to-day cargo operations. They cover calculations from IMSBC Code requirements for bulk cargo to commercial freight calculations per INCOTERMS. Grain calculations follow IMO Resolution A.119 (V) requirements.