Length to Width Ratios for Cape Ann Rowing Club Kayak classifications

Values below a ratio of 9.25 are sea kayaks, abbreviated SK. Ratios between 9.25 and 11.5 are fast sea kayaks, abbreviated FSK. Ratios equal to and above 11.5 are high performance kayaks, abbreviated HPK For this table boats with a ratio below FSK are SK. Boats with dimensions above those listed for HPK are HPK.

The left column is the boat beam in inches. Each FSK/HPK column is a increment to the listed beam.

The values in the body of the table are the waterline length to transition to the next class. So for a 17.0" beam - boats shorter than 13'1.25" are SK, boats from 13'1.25" to 15'6.832" are FSK and boats longer than 16'3.5" are HPK. The same table but in metric is provided below.

Length to width ratios in english (feet and inches)

00.1250.250.3750.50.6250.750.875
FSKHPKFSKHPKFSKHPKFSKHPKFSKHPKFSKHPKFSKHPKFSKHPK
1410'9.500"13'5.000"10'10.656"13'6.438"10'11.812"13'7.875"11'0.969"13'9.312"11'2.125"13'10.750"11'3.281"14'0.188"11'4.438"14'1.625"11'5.594"14'3.062"
1511'6.750"14'4.500"11'7.906"14'5.938"11'9.062"14'7.375"11'10.219"14'8.812"11'11.375"14'10.250"12'0.531"14'11.688"12'1.688"15'1.125"12'2.844"15'2.562"
1612'4.000"15'4.000"12'5.156"15'5.438"12'6.312"15'6.875"12'7.469"15'8.312"12'8.625"15'9.750"12'9.781"15'11.188"12'10.938"16'0.625"13'0.094"16'2.062"
1713'1.250"16'3.500"13'2.406"16'4.938"13'3.562"16'6.375"13'4.719"16'7.812"13'5.875"16'9.250"13'7.031"16'10.688"13'8.188"17'0.125"13'9.344"17'1.562"
1813'10.500"17'3.000"13'11.656"17'4.438"14'0.812"17'5.875"14'1.969"17'7.312"14'3.125"17'8.750"14'4.281"17'10.188"14'5.438"17'11.625"14'6.594"18'1.062"
1914'7.750"18'2.500"14'8.906"18'3.938"14'10.062"18'5.375"14'11.219"18'6.812"15'0.375"18'8.250"15'1.531"18'9.688"15'2.688"18'11.125"15'3.844"19'0.562"
2015'5.000"19'2.000"15'6.156"19'3.438"15'7.312"19'4.875"15'8.469"19'6.312"15'9.625"19'7.750"15'10.781"19'9.188"15'11.938"19'10.625"16'1.094"20'0.062"
2116'2.250"20'1.500"16'3.406"20'2.938"16'4.562"20'4.375"16'5.719"20'5.812"16'6.875"20'7.250"16'8.031"20'8.688"16'9.188"20'10.125"16'10.344"20'11.562"
2216'11.500"21'1.000"17'0.656"21'2.438"17'1.812"21'3.875"17'2.969"21'5.312"17'4.125"21'6.750"17'5.281"21'8.188"17'6.438"21'9.625"17'7.594"21'11.062"
2317'8.750"22'0.500"17'9.906"22'1.938"17'11.062"22'3.375"18'0.219"22'4.812"18'1.375"22'6.250"18'2.531"22'7.688"18'3.688"22'9.125"18'4.844"22'10.562"
2418'6.000"23'0.000"18'7.156"23'1.438"18'8.312"23'2.875"18'9.469"23'4.312"18'10.625"23'5.750"18'11.781"23'7.188"19'0.938"23'8.625"19'2.094"23'10.062"
2519'3.250"23'11.500"19'4.406"24'0.938"19'5.562"24'2.375"19'6.719"24'3.812"19'7.875"24'5.250"19'9.031"24'6.688"19'10.188"24'8.125"19'11.344"24'9.562"
2620'0.500"24'11.000"20'1.656"25'0.438"20'2.812"25'1.875"20'3.969"25'3.312"20'5.125"25'4.750"20'6.281"25'6.188"20'7.438"25'7.625"20'8.594"25'9.062"

Length to width ratios in metric (centimeters)

00.250.50.75
FSKHPKFSKHPKFSKHPKFSKHPK
35 323.750  402.500  326.062  405.375  328.375  408.250  330.688  411.125 
36 333.000  414.000  335.312  416.875  337.625  419.750  339.938  422.625 
37 342.250  425.500  344.562  428.375  346.875  431.250  349.188  434.125 
38 351.500  437.000  353.812  439.875  356.125  442.750  358.438  445.625 
39 360.750  448.500  363.062  451.375  365.375  454.250  367.688  457.125 
40 370.000  460.000  372.312  462.875  374.625  465.750  376.938  468.625 
41 379.250  471.500  381.562  474.375  383.875  477.250  386.188  480.125 
42 388.500  483.000  390.812  485.875  393.125  488.750  395.438  491.625 
43 397.750  494.500  400.062  497.375  402.375  500.250  404.688  503.125 
44 407.000  506.000  409.312  508.875  411.625  511.750  413.938  514.625 
45 416.250  517.500  418.562  520.375  420.875  523.250  423.188  526.125 
46 425.500  529.000  427.812  531.875  430.125  534.750  432.438  537.625 
47 434.750  540.500  437.062  543.375  439.375  546.250  441.688  549.125 
48 444.000  552.000  446.312  554.875  448.625  557.750  450.938  560.625 
49 453.250  563.500  455.562  566.375  457.875  569.250  460.188  572.125 
50 462.500  575.000  464.812  577.875  467.125  580.750  469.438  583.625 
51 471.750  586.500  474.062  589.375  476.375  592.250  478.688  595.125 
52 481.000  598.000  483.312  600.875  485.625  603.750  487.938  606.625 
53 490.250  609.500  492.562  612.375  494.875  615.250  497.188  618.125 
54 499.500  621.000  501.812  623.875  504.125  626.750  506.438  629.625 
55 508.750  632.500  511.062  635.375  513.375  638.250  515.688  641.125 
56 518.000  644.000  520.312  646.875  522.625  649.750  524.938  652.625 
57 527.250  655.500  529.562  658.375  531.875  661.250  534.188  664.125 
58 536.500  667.000  538.812  669.875  541.125  672.750  543.438  675.625 
59 545.750  678.500  548.062  681.375  550.375  684.250  552.688  687.125 
60 555.000  690.000  557.312  692.875  559.625  695.750  561.938  698.625 
61 564.250  701.500  566.562  704.375  568.875  707.250  571.188  710.125 
62 573.500  713.000  575.812  715.875  578.125  718.750  580.438  721.625 
63 582.750  724.500  585.062  727.375  587.375  730.250  589.688  733.125 
64 592.000  736.000  594.312  738.875  596.625  741.750  598.938  744.625 
65 601.250  747.500  603.562  750.375  605.875  753.250  608.188  756.125 
66 610.500  759.000  612.812  761.875  615.125  764.750  617.438  767.625 
67 619.750  770.500  622.062  773.375  624.375  776.250  626.688  779.125 
68 629.000  782.000  631.312  784.875  633.625  787.750  635.938  790.625 
69 638.250  793.500  640.562  796.375  642.875  799.250  645.188  802.125