Propeller Size Calculator for
Displacement / Semi-displacement Hulls
Instructions for use:
Enter your data into the form.
Use accurate data. The results are only as good
as the data you enter.
Press the calculate button to display the results.
Using the "back" button on your browser,
you can return to this data form from the results page
to change individual items without having to re-enter everything again.
Waterline length of vessel
Beam at the waterline
Molded hull draft (excluding keel)
Vessel displacement weight
Number of engines (Shaft lines)
Maximum rated horsepower of each engine
Maximum rated engine R.P.M.
Number of shaft bearings between the gear box and the propeller
(calculations will show the HP required to attain your desired speed)
1 knot = 1.1508 mile per hour
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