Blue Heron's Nest

On-line Boat Design Calculators


** NOTE: All INPUTS must be NUMERIC and GREATER THAN ZERO
No Input Validation is performed!!!


If you are like me, with a mind that is always thinking nautically, and occasionally gets jolted back into the "real world", these simple little formulas might help you out with the design of your DreamBoat! The formula are for a basic rectangular box shape. The speed constant used is 1.34. Hope these help.


Calculate Boat Displacement:

Waterline Width(Beam) in Ft.
Waterline Length(LWL) in Ft.
Depth of hull in the water(Draft) in In.
Displacement in Lbs, freshwater
Displacement in Lbs, saltwater


Calculate Boat Draft:

Waterline Width(Beam) in Ft.
Waterline Length(LWL) in Ft.
Weight of Boat, Motor, Contents (Displacement) in Lbs
Draft in Inches, freshwater
Draft in Inches, saltwater


Calculate Hull Speed:

Waterline Length(LWL) in Ft.
Speed in Knots (nautical Miles/Hr)
Speed in Miles/Hr
Speed in Kilometers/Hr





LINKS:
Gavin Atkins Boat Design Software
Gavin Atkins Boat Design Rules


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