Cargo or Tanks → choose the active vessel, condition, hold or tank before entering measurements.

Choose the active vessel and condition, enter measured values carefully, correct highlighted issues, calculate, compare with approved criteria and save the record. Replace all example values before real work.
Cargo or Tanks → choose the active vessel, condition, hold or tank before entering measurements.




Resolve capacity, calibration, unit and FSM-verification warnings before saving; recheck the complete condition in the approved loading system.
CaptainCalc is decision support. It never replaces approved stability data, loading computers, ECDIS, official publications, procedures or professional judgment.
Freemium keeps essential online tools available with ads. Premium removes ads, raises limits and unlocks the complete offline professional workspace.
