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Get the Right Amount of Paint

Note: The following recommendations are for two coats of paint. All values are approximate

Boat Type Bottom Paint Topside Topside Polyurathane Enamel Waterline Deck
10' Dinghy 1 qt. 1 qt. 1 qt.
14' Outboard 1-2 qt. 1 qt. 1 qt 1 pt.
18' Runabout 2 qt. 1 qt. 2 qt 1 pt.. 1 qt.
20' Sailboat 3 qt. 2 qt. 2 qt 1 pt.. 1 qt.
24' Runabout 3-4 qt. 2 qt. 2 qt 1 pt. 1 qt.
30' Sailboat 1.5 gal. 3 qt 1 gal. 1 pt. 2 qt 2 qt.
32' Cruiser 1.5-2 gal. 3 qt 1 gal. 1 pt. 2 qt 2 qt.
36' Auxiliary 2 gal. 5 qt 2 gal. 1 pt. 1 gal. 3 qt.
40' Cruiser 2.5 gal. 6 qt 2.5 gal. 2 pt. 1.5 gal. 1 gal.
45' Sailboat 3-3.5 gal 8 qt 3 gal. 3 pt. 2 gal. 1 gal.
50' Sportfisher 4+ gal. 8 qt 3 gal. 4 pt. 2.5 gal. 1 gal.
Right Amount of Paint

Another way to determine bottom paint quantity is to estimate the approximate surface area of the hull below the waterline, using the following formula:

Length x Beam x .75 = Approximate Underwater Surface Area in Sq. Ft.

Each paint has a "theoretical coverage" area, but most paints require at least two coats, so you can expect actual coverage to be no greater than half of the theoretical value.

Painting Guides with Color Charts

  • West Marine Boater’s Painting Guide.pdf File
  • Interlux Painting Guide .pdf File
  • Pettit Painting Guide.pdf File