FREE MARITIME TOOLS
Maritime Calculators
200+ professional maritime calculators — navigation, stability, cargo, engineering and conversion tools.
Stability
6 toolsGM Calculator
Metacentric height for vessel stability assessment
Draft Survey Calculator
Accurate cargo quantity determination by draft readings
Free Surface Effect
Free surface moment and GM correction calculation
Displacement Calculator
Vessel displacement from draft readings and hydrostatics
List Calculator
Calculate list angle from transverse weight shift
Trim Calculator
Fore and aft trim adjustment for loading/discharging
Cargo
6 toolsStowage Factor Calculator
Stowage factor for bulk cargo hold planning
Cargo Deadweight
Available cargo deadweight based on vessel constants
Ullage Calculator
Tank ullage to volume conversion for liquid cargo
VCG Calculator
Vertical centre of gravity from loading manifest
Grain Cargo Calculator
Grain heeling moment and stability requirements
Reefer Capacity
Refrigerated container capacity and plug requirements
Engineering
6 toolsFuel Consumption Calculator
Daily fuel consumption based on speed and engine load
SFOC Calculator
Specific Fuel Oil Consumption efficiency metric
RPM to Speed
Propeller RPM to vessel speed conversion
Heat Exchanger Efficiency
Thermal efficiency for marine heat exchangers
Pump Capacity Calculator
Ballast and cargo pump flow rate calculations
Generator Load Calculator
Electrical load balance and generator selection