Work out deadweight tonnage instantly with clear inputs, formula shown and shareable results.
Deadweight is everything the ship can carry: loaded displacement minus lightship weight. It includes bunkers, stores, fresh water, crew and ballast as well as cargo, so cargo capacity is deadweight minus all of those — a distinction that matters on long voyages with heavy bunker loads.
Deadweight
DWT = loaded displacement - lightship; cargo = DWT - bunkers - stores - ballast
Marine results are planning estimates only. Verify against the vessel's approved stability booklet, loading manual, class society rules and applicable maritime regulations before loading or sailing.
No. Deadweight includes fuel, water, stores and crew. On a long voyage bunkers alone can absorb several percent of deadweight.
Because that is the maximum permitted loading in normal conditions under the load line rules, giving a consistent basis for comparison.