載重噸位 (Deadweight tonnage,縮寫為D.W.T.、d.w.t.、dwt或TDW)係指船舶能夠安全運載的質量[1][2][3],載重噸位並不包括船舶本身重量。計算上包含貨物、燃料、淡水、壓艙水、糧食、旅客及船員之重量[1]。
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Draft_scale_at_the_ship_bow_%28PIC00110%29.jpg/640px-Draft_scale_at_the_ship_bow_%28PIC00110%29.jpg)
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Echelle_Port_en_lourd.jpg/640px-Echelle_Port_en_lourd.jpg)
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