Displacement–length ratio

Template:Short description The displacement–length ratio (DLR or D/L ratio) is a calculation used to express how heavy a boat is relative to its waterline length.

DLR was first published in Template:Cite book

It is calculated by dividing a boat's displacement in long tons (2,240 pounds) by the cube of one one-hundredth of the waterline length (in feet):

$𝐷𝐿𝑅=\frac{𝑑𝑖𝑠𝑝𝑙𝑎𝑐𝑒𝑚𝑒𝑛𝑡(\mathrm{l}\mathrm{b})/2240}{(0.01\times 𝐿𝑊𝐿(\mathrm{f}\mathrm{t}){)}^3}$

DLR can be used to compare the relative mass of various boats no matter what their length. A DLR less than 200 is indicative of a racing boat, while a DLR greater than 300 or so is indicative of a heavy cruising boat.

Displacement	DLR
ultralight	under 90
light	90 to 180
moderate	180 to 270
heavy	270 to 360
ultraheavy	360 and up

See also

• Sail Area-Displacement ratio

References

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